Federal University Dutse
Question
Asked 3 May 2015
How do you purify biogas to increase the methane content?
What are the best options available for stripping carbon dioxide, H2S and other gases from biogas to increase the methane value.
Most recent answer
Thanks
Popular answers (1)
National Research and Innovation Agency Republic of Indonesia (BRIN)
It depend on what resource you have to purify, how much methane content you want to increase, and what purposes you will utilize the biogas for. The common technologies which using biogas purification/CO2 Capture in industry are Amine absorbtion coloumn and pressure swing adsorbtion. However for household scale, you can use water absorbtion on bubble or coloumn as simple way to purify. The more advance technology you can use adsorption material such as carbon active, silica gell, zeolite, etc.
6 Recommendations
All Answers (22)
National Research and Innovation Agency Republic of Indonesia (BRIN)
It depend on what resource you have to purify, how much methane content you want to increase, and what purposes you will utilize the biogas for. The common technologies which using biogas purification/CO2 Capture in industry are Amine absorbtion coloumn and pressure swing adsorbtion. However for household scale, you can use water absorbtion on bubble or coloumn as simple way to purify. The more advance technology you can use adsorption material such as carbon active, silica gell, zeolite, etc.
6 Recommendations
Newcastle University
You can use iron oxide (Fe2O3) pellets to remove H2S and silica beads (SiO2) to remove water vapors. For CO2 you can use soda (NaOH) to reduce your carbon dioxide (CO2). All the above are related to the scale of your experimental/engineering endeavour. Calculate how much you need based on the quantity of the gases you want to remove and see how often you would have to re activate.
Hope this helps a bit
Evangelos
4 Recommendations
National Research Center, Egypt
In my lab-scale experiment,The acidified brine solution was used which makes the biogas insoluble in the water.
also,alkaline solution( 2% NaOH solution) can be used in lab scale for decreasing CO2 content in biogas
2 Recommendations
Ministry of Environment Solid Waste Management and Climate Change
Small tip: A relatively high water content (low solids AD) in the digester can help increase CH4 content. The reason behind is that since there is a lot of water in the system which is also operating at an alkaline pH, the CO2 and H2S formed get absorbed within the substrates solution, resulting in a higher content CH4 in the biogas.
Techniques for removing H2S include the use of activated carbon, alkaline solution or use of Zn or Fe oxides.
1 Recommendation
Swedish University of Agricultural Sciences
Quite alot of the CO2 can be removed using bottom ashes from biomass. It might be an option to consider to reduce total costs for the upgrading step.
2 Recommendations
University of Lay Adventists of Kigali
My suggestion is based on the use of biogas scrubbing system that can help to remove different gas such as hydrogen sulfide,Carbon dioxide,moisture trapping and so on..
University of Nigeria
Thanks to all the contributors. I find most of them useful. Dr. Fuqing Xu please can you give me further details about the paper you referred me to.
University of Nigeria
Pass the biogas through lime water to reduce or remove CO2 but may run the risk of affecting the calorific value of the biogas. You may try using CO2 Monitor (M90) as used in natural gas. Secondly, use iron fillings or feric oxide to remove HS2. Remember that biogas contains 65 per cent methane & 35 per cent CO2.
4 Recommendations
Motilal Nehru National Institute of Technology
nice appropriate answer for biogas purification, thanks to all
1 Recommendation
Federal University of Rio Grande do Norte
there is an patent of pyrolysis gas to enrich biogas , the hydrogen and the gas CO , as this can be done insitu of external excitu , several recent paper also uploaded in research gate
1 Recommendation
Federal University of Rio Grande do Norte
This route is known as pyrobiomethan , the problem are mass tranfser limitation , can be better way the pyrogas, syngas biomethane bette fuel than combined hydrogen and methane called biohythane
1 Recommendation
University of Nigeria
Dear Dr. Pagndai V Pannir Selvam. Can you supply me with the source where I can read more about this?
Thanks
Dr. Emmanuel Echiegu
Federal University of Rio Grande do Norte
we have made biological post doctorate researchh 10 years before
, the recent updated one is
Biogas upgrading – a technical review
Traduzir esta página26 de mai de 2016 - Water, biogas upgrading and water treatment. 2014-2016 ... IEA Task 37, stajsjcs on operajonal biogas upgrading plants among IEA. Task 37 ...
[PDF]Upgrading Technologies for Biogas Production Plants - Munin - UiT
Traduzir esta páginade HW Brendeløkken - 2016 - Artigos relacionados1 de jun de 2016 - The International Energy Agency (IEA) and the World Energy Council estimates that ... commercially used biogas upgrading technologies.
[PDF]
1 Recommendation
University of Nigeria
Dear Dr. Pannirselvam
Thanks a million for the link supplied. I will study them and, if I still have some questions, I hope you don't mind my getting back to you. Once again, thanks.
Dr. Emmanuel Echiegu
1 Recommendation
University of Nigeria
Dear Rakesh
Find below some of the responses i received when i posed the question. I hope you find the responses useful.
Pass the biogas through lime water to reduce or remove CO2 but may run the risk of affecting the calorific value of the biogas. You may try using CO2 Monitor (M90) as used in natural gas. Secondly, use iron fillings or feric oxide to remove HS2. Remember that biogas contains 65 per cent methane & 35 per cent CO2.
1 Recommendation
Similar questions and discussions
Related Publications
Several alternative biogas purification techniques are currently being examined for increasing the efficiency of the biogas production. Phototrophic microalgal strains have been tested for converting large quantities of CO², from biogas into algal biomass. However, nearly all studies on blogas upgrading with microalgae resulted in contamination of...
Natural gas is the primary source of energy, accounting for around 20% of the world’s energy production. It is also a key element in reducing CO2 emissions due to its key role in stabilizing renewable energy sources. At the same time, natural gas as a fossil fuel that emits CO2 should be limited. A natural candidate that can ensure the stabilizatio...
The market for biogas production has been increasing every year all over the world. The use of biogas as an energy vector is accomplished through the most diverse applications, such as direct burning (thermal energy), internal combustion engines, and fuel cells. Besides direct applications, biogas can be used as a raw material for producing high ad...