Science topic
Hydrogen - Science topic
Hydrogen. The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight 1. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are protons. Besides the common H1 isotope, hydrogen exists as the stable isotope deuterium and the unstable, radioactive isotope tritium.
Questions related to Hydrogen
I need to prepare a synthetic medium. In the literature, they used di-potassium hydrogen orthophosphate trihydrate. In my lab, di-potassium hydrogen orthophosphate ( anhydrous ) is available. can I use it? TIA
As a design engineer in an engineering team whose work is developing a new gas turbine of 2 MW used for thermal power generation which is fuelled by non-carbon fuels, such as hydrogen and ammonia, your task is to analyse and design the combustion system for providing stable and efficient combustion in the gas turbine.
I calculate the amount of corrosion rate but I couldnot find any formula or documents to measure the hydrogen gas
which type of basis set has enough accuracy (6-31, 6-311G) for a reserch publucation (in view of optimun calculation time and highest accuracy) for opt+freq of dimond with 120 atom? (tetrahedral unit cell including rigid carbon strucure with hydrogen on surface). Dimond strucure was geometry optimized by hyperchem befor submit to gaussian.
In theory, the voltage needed to be applied for water splitting is 1.23 V. When I apply 1.23 V, after 10 min system shows amplifier overloaded error so I decreased the voltage. I applied 0.7 V and I see hydrogen bubbles around the cathode ( Platinum as WE).
I have collected a LSV data by taking Hg/HgO as the reference electrode. But I want to convert this one to RHE. Please suggest me the required conversion equation. 0.1M KOH was taken as the supporting electrolyte.
Dear researchers, I am performing research on solar heat for industrial production using concentrated solar power. From what I've seen in the literature, the production of green hydrogen using solar thermochemical water splitting is done using either solar tower or parabolic dish. I could not find a paper that investigated the use of parabolic trough collectors for green hydrogen production. I wonder if that's possible or not.
Hello, I need a model to simulate the electrolysis process using solar panels. Can you help me?
Thank you
- How does the porosity and permeability of saline formations affect hydrogen storage efficiency?
- Can the use of different injection methods improve hydrogen storage efficiency in saline formations?
- How does the depth and temperature of saline formations impact hydrogen storage efficiency?
- Can the addition of certain minerals or compounds enhance hydrogen storage efficiency in saline formations?
- How does the pressure of hydrogen in the saline formation affect its storage efficiency?
- Can the use of multiple layers of saline formations increase the overall hydrogen storage efficiency?
Applications_Library/Memory/SONOS_Memory
I want to put the MSC Hydrogen degradation model into the SONONS structure.
How do I input and run the trap model and hydrogen diffusion model together in the nitride physics?
I want hydrogen to diffuse from nitride to oxide.
Please help.
It will be appreciable if you suggest me paper on this basis.
Green hydrogen can be stored and transported in several ways, including compressed hydrogen gas, liquid hydrogen, methanol, and ammonia. Liquid ammonia has a higher capacity for hydrogen storage by volume compared to liquid hydrogen, with a capacity of 121 kg H2/m3 for ammonia compared to 70.8 kg H2/ for liquid hydrogen. At room temperature, ammonia can be stored at a relatively low pressure (0.99 MPa), which is significantly lower than the pressure required for liquid hydrogen storage. However, ammonia has a lower energy density than hydrogen (18.6 MJ/kg compared to 142.8 MJ/kg for hydrogen gas at standard temperature and pressure) and a higher mass density (600 kg/m3 compared to 70.8 kg/m3 for liquid hydrogen), which can make it more challenging to store and transport. Methanol is another potential option for hydrogen storage, but it has a lower energy density compared to ammonia (20.1 MJ/kg), and utilization release CO2, which can be a concern from an environmental perspective. The decomposition of ammonia to release hydrogen requires a relatively large amount of energy (30.6 kJ/mol H2), while the regasification of liquid hydrogen only requires a small amount of energy (0.907 kJ/mol H2). This can make the utilization of ammonia as a hydrogen storage and transportation medium less energy efficient.
Give your opinion.
I use 6311g++(2df, 2pd) and cam-b3lyp method.
I use a system wuith 16 proccesores and 16 GB. I only want the HF of a symetric hydrocarbon with 180 atom (only carbon and hydrogen, saturated carbons) already the molecule is opt+freq with 631g. I use the optimized log file to calculatiobn the energy. Is it possible to write a code in the input file to shorten the time of calculation?
we are working on ammonia decomposition to produce Hydrogen and Oxygen gas
I am looking for novel Ph.D. research areas focusing mainly on Hydrogen production/storage that are related to industrial engineering, specifically in optimization, Supply chain management.
Why hydrogen is stored at high pressures when used for engines. Is it suitable for petrol engines or diesel engines or both. How to induct hydrogen into diesel engines. Is it possible to mix hydrogen with NH3. If so, How.
What factors could be contributing to the observed difference in hydrogen purity between a series configuration and a parallel configuration of a 4-cell alkaline electrolysis system, where the solution conditions (temperature, KOH concentration and flow rate) are held constant? In the series configuration, the overall voltage is 8 volts (2 volts per cell) and the hydrogen purity is about 92%, while in the parallel configuration the overall voltage is 2 volts and the hydrogen purity is about 98%. What mechanisms or processes might be responsible for this difference in hydrogen purity?
In general, global double hybrid functional (ex. B2LYP) is outperform their range-separated(RS) counterparts(ex. wB2LYP). However, RS performs better in self-interaction error(SIE) for hydrogen atoms..
When calculating Li complexes(Li-tert-BuO_dimer to hexamer) for free energies, what kind of functional is appropriate?
I wonder what's more adequate for my calculation among B2LYP and wB2LYP.
(I'll use 6-311g(d,p) basis set)
And also, I don't know what is self-interaction error.
For testing the design safety of hydrogen tanks, standards like ISO 15869, EC79, JARI 2002, KHK S0128, etc. are usually preferred. However, for transportation of these tanks TPED, DOT, TC/UN, KGS, JIS, etc. certification needs to be obtained. Can anyone explain that what are the tests which the tank will need to pass for TPED certification?
I saw that some research papers added hydrogen to the geometry they were studying in Gaussian 9, even though that geometry (C2N nanosheet) didn't have hydrogen. I've also seen that adding hydrogen to a structure (like a C2N 2D nanosheet) eliminates the negative frequency, but gaussian 9 frequency calculation gives negative frequency mode even without adding hydrogen in C2N 2D nanosheet.
However in Dmol3 calculation, Dmol3 does not require adding extra hydrogen. So I wanted to know that is this ok to add extra hydrogen in a geometry??? or is it wrong process.
I've included two C2N structures below. One has extra hydrogen (in Gaussian 09), and the other doesn't (in Domol3)
What type of reactor is best, conditions mass/mole , energy balance....
i mean any example for "idea to application" in the case of solid state hydrogen storage systems like liquid hydrogen and compressed gas. is there any patent or any research journals regarding that?
When will the green transformation include avionics? When will hydrogen-oxygen-fueled aircraft be developed? When will emission-free aviation based on hydrogen-oxygen jet technology be developed? When will passenger and cargo planes powered by hydrogen-oxygen jet engines be built?
Since space shuttles, which were already built several decades ago, flew to the planet's orbit and were powered by hydrogen-oxygen fuel, it should be technically possible to build passenger and cargo planes powered by hydrogen-oxygen jet engines.
With the urgent transition to a zero-carbon economy, there is growing pressure to extend the green transition to avionics as well, i.e. to build zero-emission, zero-greenhouse-gas-emitting aircraft, and hydrogen-oxygen jet engines are such a solution. In the future, as part of the zero-carbon economy, such technological solutions should become widespread, and thus the green transformation should also include the aviation sector. The question then arises, when will this happen? When will avionics also be pro-environmentally transformed as part of the pro-environmental transformation of the economy and reduction of CO2 emissions into the atmosphere?
Is it possible to build passenger and cargo aircraft powered by hydrogen-oxygen jet engines?
Is it possible to build transcontinental space passenger aircraft powered by hydrogen-oxygen jet engines?
Is it possible to also build small jet passenger and cargo aircraft powered by hydrogen-oxygen engines?
Will avionics also be pro-environmentally transformed as part of a pro-environmental transformation of the economy and reduction of CO2 emissions into the atmosphere?
When will the green transformation also include avionics?
When will emission-free aviation be established?
What do you think about this topic?
What is your opinion on this issue?
Please answer,
I invite everyone to join the discussion,
Thank you very much,
Best wishes,
Dariusz Prokopowicz
I have a PDB file . I have to remove hydrogen atom from CYS residues. I manually did it and when I'm running pdb2gmx command, it shows error about the hydrogen atoms. I tried -ignh flag but it ends up adding hydrogen to the residue. What should I do ? I need a topology file without hydrogen atoms in the structure file.
I'm a student. I'm simulating the production of ammonia from nitrogen and hydrogen as shown in Figure 2 and want to know the costs. But found that the value could not be viewed and encountered an error as shown in Figure 1 if you want more data or know how to solve pls answer my question.
cooler :
"ERROR> 'HE - 6' SPECIFIED AREA DIFFERS FROM CALCULATED AREA BY >10 PERCENT.
Heat transfer area INPUT: 1.105 CALC: 5.236 SF"
Turbine :
"ERROR> 'TUR- 94' ACTUAL GAS FLOW RATE INLET IS OUT OF RANGE
ERROR> 'TUR- 94' DESIGN GAUGE PRESSURE INLET IS OUT OF RANGE
ERROR> 'TUR- 94' DESIGN TEMPERATURE INLET IS OUT OF RANGE"
The hydrogen isomers of ortho and para differ in their proton spin and thermal properties.
Some scholars have been carrying out simulations of ortho to para hydrogen conversion in simulating software like aspen hysys and some other software but yet I do not know how they go about doing it.
Any response is appreciated.
Hello all.
I have a .gro file, from which I have to delete certain number of hydrogen atoms from specific residues. I tried doing it manually, but the atom numbers get mixed up and the file does not open. Can anyone suggest how to do it ?
Thanks.
Photocatalyst uses ultra-violet radiation to active a catalyst and occurs a chemical reaction. Experimentally, the use of UV source is very dangerous for health. A lot of precautions are considered for using UV source. Hence, i would like to use a heat activated catalyst to generate *OH.
Thanks to all.
I am trying to use hydrogen produced from the Alkaline electrolyzer in production of Green Ammonia. I have researched online and found most of the ammonia synthesis are done in Aspen plus or HYSYS or dwsim or similar like that.
I am trying to make Ammonia synthesis model in MATLAB but I am having problem in here. Originally I am not the chemical engineering student, so I don't know much of dynamic mass and energy balance. Is there a good resource which I can use for modelling Ammonia synthesis in MATLAB?
Alkaline electrolyzer model is made on MATLAB simulink, so I am trying to make Ammonia synthesis model on MATLAB too.
Please help me in here if you know something.
Is there a solution for liquid hydrogen and gas hydrogen transmission line leakage?
What is your suggested software for simulating the hydrogen transfer process in pipelines?
Hello Everyone !
I was trying to derive the solubility of the hydrogen in the metal hydride in the PCT curve for the first and the third segment of the curve and was wondering if someone can share me the document in which the derivation is provided .
Thank you
regards
Ketan
I'm trying to design a pilot plant process for the conversion of methane into hydrogen and solid carbon via molten metal catalytic cracking, and I'm struggling to find a good resource to follow for the design process.
I have to solve this problem, but im not an expert on CVD technique, i tryed to look for some usefull sources but i couldn't find anything can some one explain it or link something that could help?
Calculate the growth rate of the silicon epitaxial layer using reduction reaction of hydrogen and tetrachlorosilane mixture. The concentration of tetrachlorosilane in the gas flow is 0.1% (volume), the process is carried out under atmospheric pressure at the temperature set at 1273 K. Si: Ca = 5 × 1022 cm-3, hg = 7 cm/s (between 5 and 10), k = 8.62.10-5 eV/K - Bolzmann constant. Experimentally is established that surface reaction rate ks is 0.302 cm/s. Cg ~ pSiCl4/(kT)
I am looking for an alternative way to purge hydrogen (in order to obtain certain desired products in an anaerobic process). Hence, to my knowledge, mass flow controllers are regularly used for H2 injections. However, I also wanted to know if there is any other alternative way to purge hydrogen gas into an anaerobic bioreactor at any flow rate (different flow rates in case of different MFCs)? If yes, then please do let me know about some additional information about this and also about MFCs.
Hello everyone,
I am currently trying to run an IRC calculation for a RO2 structure isomerizing to the QOOH structure for the Ethanal +OH system. The RO2 and QOOH energies are agreeable with literature and the TS that was found seems to have the right imaginary frequency and movement, and it has an energy that is closer to the literature values. But whenever I run an IRC calculation, I see on GaussView that the hydrogen abstraction stops halfway and then goes back to the RO2 without ever forming a bond for the QOOH. I have tried reducing the step size, increasing the maxpoints, and even trying LQA. I have also tried doing separate IRC calculations for the forward and reverse reactions, to no fruition. Is this an indication that the TS is still wrong, or maybe the QOOH structure is incorrect? Or, is there a keyword in the route section that I am missing?
Please advise, thank you.
trying to understand the risks of a cu component served under the gas containing h2 as a main compound.
I am thinking about the future fuel system. and I think hydrogen fuel is best for the future power system. now days all of us interest electric vehicles(EV). EV has one problem that is, the charging system. To charge those batteries all country have to update the power grid. some country update the power system.
but is that all???
we are fully dependent on batteries. all of electric product now control by batteries. now renewable energy also store by batteries. But the batteries have life time. after that recycle the batteries. but It not so easy process. some country doesn't have any recycle system like Bangladesh, india, nepal, pakistan, etc.
So I think all of us should work in hydrogen fuel. It is 100% environment friendly.
Am I right or wrong????
I must measure temperature and ion density of 3-10eV plasma of hydrogen and boron at 5-50 pascals
As long as there are magnetic and electric fields, I can not install sensors inside
The first ionization energy of Hydrogen and Boron are 13.9eV and 8.3eV that corresponds to 91nm and 149nm, but there are no sensors for that frequencies
I performed Gas chromatography for mixture of gases (hydrogen, methane and carbon dioxide) using the following conditions: Nitrogen as carrier gas, injector temperature - 50 degree celsius, and detector - 120 degree celsius. The peaks generated are positive for hydrogen and methane, but negative for carbondioxide. Kindly state the reason for the above issue.
Can hydrogen and/or fusion-based power generation become the main source of carbon-free energy in the future?
Or can hydrogen and/or fusion-based power generation become the main source of carbon-free energy in the future?
Is it possible to significantly accelerate the pro-environmental transformation of the energy sector by the end of this decade based on the development of carbon-free energy sources?
Is it possible for carbon-free energy sources to become the main sources of energy by the end of this decade?
Is it possible for hydrogen and fusion-based energy to become major energy sources by the end of this decade?
What do you think about this?
What do you think on this subject?
Please reply,
I invite you all to discuss,
Thank you very much,
Regards,
Dariusz
The reaction happened in MeOH with 50 bar of hydrogen and Ni on alumina catalyst. I just wonder in what mechanism this product can be formed.
I found that hydrophobic comprised of many types such as pi-sigma interaction, alkyl interaction etc. What are the differences between them? Can someone enlighten me? I am still new in this field. Thank you in advance.
How does the polarity of water change by the dissolution of hydrogen?
Is hydrogen-rich water more polar than pure water?
Can you explain the mechanism and provide some references, please?
Thanks
I am simulating a hydrogen load with an electrolyzer, a PV system, and the grid.
I have been trying to simulate for a while now but no matter how small the hydrogen load and how big the pv system it always tells me that is unfeasible due to hydrogen unmet load. I would like the grid to supply most of the hydrogen production, but I still can't make it work
any suggestions?
I want to do hydrogen and oxygen evolution reactions using nanoparticles synthesised using laser ablation method. But the yield is very low in this method.
is there a minimal requirement of quantity of the material (nanoparticles in my case) that is needed for the experiment. Like how much of the sample I need to prepare in order to carry out the reactions mentioned above.
Dear all,
I'm trying to simulate the combustion of hydrogen diesel in dual fuel mode in ANSYS-Forte. I have kinetic reaction mechanisms file( .txt) but in order to build the .cks file in the pre-processing part of the software, a thermophysical properties file is needed which I don't have it.
Would you please let me know how should I do this.
Thanks in advance for your time and support.
Masoud
With the help of which technologies can a commercial hydrogen production system and bank be created for the development of hydrogen energy?
Hydrogen production companies are to be set up in the European Union and a European hydrogen bank is to be established. This is necessary in view of the need to develop hydrogen energy. The development of hydrogen energy is one of the best solutions for a pro-climate and pro-environmental transformation of the energy sector and for increasing energy security, increasing the scale of energy self-sufficiency and reducing the scale of future, successive energy crises. Hydrogen power is one of the key types of emission-free energy sources. Consequently, the development of hydrogen energy is an excellent solution to carry out a pro-environmental transformation of energy, to develop green energy, to reduce CO2 emissions, to counteract the progressive process of global warming, to reduce the scale of the negative effects of a future global climate catastrophe that may still occur in this 21st century.
In view of the above, I address the following question to the esteemed community of researchers and scientists:
With the help of which technologies can a hydrogen bank system be created for the development of hydrogen energy?
What do you think about this topic?
Please reply,
I invite you all to discuss,
Thank you very much,
Warm regards,
Dariusz Prokopowicz
I would like to know the thermo-hydraulic condition in the SGTS line just after the hydrogen explosion in Unit 3. I need the gas pressure (gas density) to calculate heat transfer from the gas to the SGTS piping. I guess that the blast pressure of the hydrogen explosion was about 5 atm. Is it true? Are there any references?
Hello everyone,
I will be using hydrogen gas at 5 bar pressure, Room temperature and 12 l/min flow-rate and 50 liter cylinder.
Since the lower limit of Hydrogen is 4% by Volume in Air to form an explosive mixture with air.
How could I roughly estimate the volume of my room in cm3 etc in which I would be doing the experiments?
We want to make sure that the room should be big enough before the Hydrogen concentration reaches this value of 4%.
Thank you.
Hello guys. I have a question about the determination of gases concentration in gc analysis. We are running an experimental test. However we are observing that the area of a reactant (CO) is increasing during the experiment conmparing to the initial chromatogram. Besides, the hydrogen area is not deacreasing too.nThe area is proportional to the reactant concentration, right? Actually, we are not using an internal standard. We are running a Fischer-Tropsch reaction.
Hello everyone!
I want to simulate a premixed combustion case with Hydrogen/air (or oxygen) chemistry.
I know simulating a non-premixed combustion case with hydrogen/air detailed chemistry means injecting hydrogen as fuel and air as oxygen at a particular temperature and pressure and using any available chemical mechanism (GRI, UCSD, etc...).
But, what is meant by simulating premixed combustion with detailed chemistry?
Hi, I'm graduate student working on electrocatalyst.
Most of the research article about electrocatalysis HER only measure the electrochemical performance ,such as LSV, Tafel slope, overpotentail. The production rate of hydrogen is seldom measured by research group.
Is the alkaline electrolyte won't have other reaction except HER?
I appreciate your help and sorry for my poor english.
Professor Blaaiberg,
I cannot find a uiersity in Australia who will accept me for my PhD. Although the subject starts with hydrogen fuel cells to power electric locomotives the most important part is Slip/Slide cotrol of the bogie wheels on a locomotive. I need to build and test the Traction Simulator and then it can be applied to a live locomotives.
Can you help me please.
Bernard Schaffler. bernard.schaffler01@gmail.com
How hydrogen annealing of H2 concentration (%H2) affect MOSFET/semiconductor carrier concentration? From the research papers I've read, it is mainly on the time and temperature of hydrogen annealing they had done on their experiments to study on carrier concentration. What about the concentration/content of H2 during Hydrogen annealing that affects the carrier concentration?
Dear
In the context of the increasing scale of the energy and climate crisis, mainly renewable and zero-carbon energy sources will be developed in the future, which mainly include hydrogen energy and fusion-based energy. This raises the following question:
What are the opportunities for the development of zero-carbon hydrogen and/or fusion-based energy?
What are the possibilities for hydrogen energy applications in powering motor vehicles, cars, aircraft, etc. and supplying buildings and industrial plants with electricity and heat from hydrogen and/or fusion-based energy?
What technologies still need to be improved and developed so that zero-carbon hydrogen and/or fusion-based energy can rapidly become widespread and dominant energy sources?
What is your opinion on the subject?
What do you think about this topic?
Please reply,
I invite you all to discuss,
Thank you very much,
Best regards,
Dariusz
I wish to know in detail about the Carbon balance for Perhydro Dibenzyltoluene dehydrogenation using Pt/Al2O3 catalyst. ? The inlet to the reactor is Perhydro Dibenzyltoluene (H18 DBT) and outlet products from the reactor might be H0DBT, H6DBT, H12 DBT, H18DBT and Hydrogen gas. How to identify the percentage composition of each.? Does I need to go for chromatography. ? Is there any alternative method to do that. Does anyone have prior experience in dealing with the Perhydro Dibenzyltoluene dehydrogenation and the analysis of its products? Thanks
Whee can i find a university who will accept my proposed PhD thesis. The subject is Hydrogen Fuel Cells to power electric locomotives and it includes Slip/Slide of the bogie wheels.
Prof. Blaaiberg could you accept my thesis at your university?
Bernard Schaffler
I want to calculate the density of a mixture of hydrogen, methane and helium using EOS, please kindly recommend relevant literatures, many thanks.
Can hydrogen reduce all metal oxides in a heated environment? As far as I know, metal oxide such as NiO can be reduced. But is it the same as other metals? Especially metals oxide that I used, which is:
Gallium(I) oxide, Ga2O
Gallium(III) oxide, Ga2O3
Niobium oxide, Nb2O5
Silver oxide, Ag2O
Silver(II) oxide, AgO
Is there any other methods I can detect hydrogen gas quantitively except of GC-TCD?
I know there is pop-test, but I can't detect gas quantitively.
If you have any idea, please let me know. Thanks a lot.
I was trying to model a system with several chlorophyll molecules and carotenoids. For adding hydrogens, I used chimera which is working perfectly well for carotenoids. However, the chlorophyll molecules are not getting pronated in the desired manner. There are discrepancies in the number of hydrogen atoms. Sometimes, these packages fails to identify the valencies correctly. The results were even worse when Pymol is used. Previously, I used HAAD for this purpose. Unfortunately, HAAD is not giving any outputs this time (only getting 0 KB files). I need to add hydrogens to these molecules before setting up a system in GROMACS. How can I model these chlorophyll molecules accurately?
I am trying to simulate adsorption of hydrogen on a crystal. When one hydrogen atom is adsorbed, the calculation stop.
The processors are working but it stops printing the next steps. I let it run for 3 days but still it was there only.
No error was shown in the log file or anywhere.
Dear all,
I am trying to calculate the first 6 excited states (singlets and triplets) of a molecule using CIS and CISD module in GAMESS. The implementation of CIS in the Gamess input file is easy and I obtain the results. However, I am unable to find a keyword in the manual that will allow me to calculate the singlets and triplets with CISD. It will be really helpful if you can kindly help me with the input file that allows singlet and triplet excited states. Below I mention what I am using for the CIS module.
$contrl nprint=-5 ispher=1 cityp=cis maxit=200
scftyp=rhf $end
$system timlim=5700 mwords=1000 $end
$scf SOSCF=.FALSE. DIIS=.TRUE. DIRSCF=.TRUE. DAMP=.TRUE. $end
$cis nstate=6 dgaprx=.FALSE. NDAVIT=50 iroot=1 $end
$basis gbasis=KTZVP $end
$guess guess=huckel $end
$data
Methylene...CI...
Cnv 2
Carbon 6.0
Hydrogen 1.0 0.0 0.82884 0.7079
$END
Hi all,
To set things clearly: I am a PhD student working on the process implications of electryfing the ammonia production by replacing conventional SMR with Water Electrolysis. A part of my preliminary work is to assess the difference in theoretical minimum energy consumption. To do so, I have calculated a first approximation by summing up the reactions (SMR, Water gas shift, Haber-Bosch,...) and calculating the enthalpy of the resulting "total" reaction. I have done this for the "Water Electrolysis + Haber-Bosch scenario" and validated the minimum with values from the literature.
However, for the conventional "SMR + Haber-Bosch scenario", values from the literature are different. To be more specific, here is the energy minimum calculated in the following conference paper:
(...) the theoretical minimum of energy consumption for the process itself (represented by LHV of methane) is 22.2 GJ/t NH3 (...)
Conference Paper 2. Kirova-Yordanova Z, Energy Integration and Cogeneration i...
So here is my question: Why use the LHV of methane (instead the enthalpy of reactions) to calculate the energy minimum ? I feel like this is incorrect as I do not take into account the synthesis of methane.
Thanks in advance for any answers,
Antoine
I do not understand the full concept/theory of how dangling bonds pins the fermi levels in MOSFET which in turn affects the threshold voltage. Hydrogen atoms are deployed to passivate the dangling bond since oxidation is not enough, however is hydrogen annealing is not done, the excess dangling bond will pins the fermi level. I could not understand this term, can someone please explain to me please?
Dear researchers,
I'm currently doing research related to the nitrogen cycle. But I am confused about the potential of the nitrogen/nitrate/nitrite reduction reaction relative to a standard hydrogen electrode (SHE).
Can anyone please provide some information for this question? I would be really thankful for your help.
Best regards
Yun
Natural hydrogen seepage has been reported in many parts of the world, but how was natural hydrogen stored in the geological background?
In other words, where was the hydrogen originally stored in the fairy circle where natural hydrogen seepage has been confirmed? Was it as a gas, or as a result of temperature and pressure in the mineral lattice?
Was the natural hydrogen produced in situ or offsite?
I have a estimated average hydrogen demand of 200kg/day. I would like to know how to determine the best pressure at which the hydrogen must be stored. The stored hydrogen is to be used for room heating later.
Thanks
Dear friends and colleagues,
My team and I have been conducting research on the potential to perform a reaction involving SiO2 and Hydrogen Fluoride to create H2O and SIF4. Specifically we are interested in the H2O so we could then extract the oxygen via electrolysis and then react the hydrogen with SiF4 to get our Hydrogen Fluoride back along with silicon. Now that the Hydrogen Fluoride is present at the end of the reaction, we can redo the reaction all over again with a new batch of SIO2. The reactions are written out below.
4HF + SiO2 -> 2H2O + SiF4
2H2O -> 2H2 + O2
SiF4 + 2H2 -> 4HF + Si
However this reaction seems to have the issue where SiF4 quickly hydrolyzes before the Electrolysis can begin, to form H2SiF6. Thus the desired chain of reactions can not commence. Are you aware of any ways to mitigate this problem or are able to point me towards relevant literature on this matter? If I am misunderstanding the reaction dynamics please correct me. All feedback/help would be greatly appreciated.
Sincerely,
Georgiy Aleksanyan
Can hydrogen obtained from the electrolysis of industrial wastewater be called green hydrogen?