Farida Lamari

In order to study the purification of hydrogen and its separation from gas mixtures by adsorption, different models describing the adsorption equilibrium of gas mixtures have been tested; seven of them have been compared with experimental multi-component data obtained from the literature. The measurements include three-component mixtures of hydroge...

The present paper reviews and analyses different models that could be used to describe the adsorption equilibrium of pure gases. The adsorption equilibrium of hydrogen, nitrogen and methane is characterised and modelled. Several thermodynamic conceptions have been selected and tested for the calculation of physico-chemical parameters. The model of...

The filamentous fungus Podospora anserina is a good model to study the breakdown of lignocellulose, owing to its ease of culture and genetical analysis. Here, we show that the fungus is able to use a wide range of lignocellulosic materials as food sources. Using color assays, spectroscopy and pyrolysis–gas chromatography mass spectrometry, we confi...

Purpose of Review The present study focuses on investigating the interconnections between adsorption technology and biomass energy production processes. A critical review on the different roles and perspectives of adsorption in these processes and on the potential of biochar as a solid bio-sorbent is investigated. Recent Findings Adsorption plays...

Biorefineries are particularly adapted to answer to the 21st century environmental concerns since their aim is to produce multiple products including bio-sourced fuels and industrial chemical products. Pyrolysis of lignocellulosic biomass can provide solid char, bio-oil and non-condensable gas with different yields depending on the type of biomass...

The price volatility of fossil resources, the uncertainty of their long-term availability and the environmental, climatic and societal problems posed by their operation lead to the need of an energy transition enabling the development and utilization of other alternative and sustainable resources. Acknowledging that indirect land-use change can inc...

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A new procedure for quantitative characterization of different types of solid materials is proposed. The technique is based on the Scanning Electron Microscopy (SEM) analysis results of porous materials and their processing by the software ImageJ. Several types of porous adsorbents AX21, AC35, GAC250, ACENO and IRH3 activated carbons were investiga...

The interaction between hydrogen molecule and graphane, material synthesized when a graphene plane is fully functionalized by hydrogen atoms, is assessable by quantum mechanical ab-initio calculations. Therefore for hydrogen, it is possible to estimate the adsorption properties of a porous material similar to activated carbons, the adsorbent surfac...

Il y a un peu moins d’un siècle, la petite mais ostensible plaque gaz à tous les étages suffisait encore à faire valoir le confort qu’offrait un immeuble. Fabriqué par pyrolyse de la houille, le gaz de ville contenait 50 % de dihydrogène et préludait ainsi à la vision de Jules Verne selon laquelle « l’eau décomposée en ses éléments constitutifs [.....

The present paper reviews the different types of adsorbents that could be used for CO2 capture from flue gases. They include carbon-based adsorbents, zeolites, molecular sieves, metal-organic frameworks, hydrotalcite-like compounds and advanced adsorbents. Their possibilities are described and confronted. In particular, it has been demonstrated tha...

Graphene planes functionalized by hydrogen or fluor atoms can constitute the characteristic adsorptive surfaces of new porous materials. Structure and symmetry of the atom arrangements in graphane and fluoro-graphene have been estimated from experiments and ab-initio computations. These data allow to determine the molecular interactions between gas...

The volatility of fossil resources prices, the uncertainty of their long-term availability and the environmental, climatic and societal problems posed by their operation, lead to the imperative of the energy transition, development and use of other alternative and sustainable resources. In Europe, established feedstocks for ethanol and biodiesel ha...

The volatility of fossil resources prices, the uncertainty of their long-term availability and the environmental, climatic and societal problems posed by their operation, lead to the imperative of the energy transition, development and use of other alternative and sustainable resources. In Europe, established feedstocks for ethanol and biodiesel ha...

Ce chapitre tente de modéliser les travaux empiriques exposés précédemment sur la base d'un travail collectif qui a réuni chercheurs en sciences sociales et en sciences de l'ingénieur. Les auteurs de ce travail ont établi un référentiel commun, des hypothèses et un outil graphique de réflexion partagée en déterminant les contraintes reproductibles...

Partout en Europe, l'installation d’éoliennes provoque des conflits qui engagent une multitude d’acteurs publics, privés ou associatifs, au sein de coalitions locales, régionales ou nationales, elles-mêmes soumises à de fortes contraintes juridiques, économiques, environnementales ou privées. Les innovations institutionnelles, financières et politi...

Some separation methods for acetic acid dehydration, such as azeotropic distillation, extractive distillation and hybrid extraction/distillation process (HEDP) are investigated and further analyzed. In order to optimize the separation process, different separation agents were investigated. The phase equilibria (vapor-liquid and vapor-liquid-liquid)...

A brief review of the different methods of hydrogen storage process for application in automobile manufacturing was presented and discussed. The hydrogen storage by adsorption on super activated carbon AX21 at various thermodynamic conditions was investigated. In order to describe the reality of the system, we planned a brief review, a discussion a...

An estimate of the fluoro-graphene adsorption capacity for hydrogen is determined by Monte Carlo numerical simulations. Structure and symmetry of the atom arrangements in fluoro-graphene have been estimated by experiments and ab-initio computations. A comparison of effective and ab-initio potential for gas adsorption on fluoro-graphene materials is...

Graphene planes functionalized by hydrogen or fluor atoms can constitute the characteristic adsorptive surfaces of new porous materials. Structure and symmetry of the atom arrangements in graphane and fluoro-graphene have been estimated from experiments and ab-initio computations. These data allow to determine the molecular interactions between gas...

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The chemically modified multiwalled carbon nanotubes (MWCNT)/poly(1-vinyl-1,2,4-triazole) (PVTri) composites were prepared via in situ emulsion polymerization. The morphological and structural properties of the surface-modified MWCNT and the synthesized MWCNT/PVTri composites were characterized by Fourier transform infrared spectroscopy, X-ray diff...

Using a scanning electronic microscope have been investigated three types of adsorbents Zeolite 13X, activated carbon AC35, IRH3 and clays. The structure of the samples in the form of powder, granules, and compact formations of cylinders or tablets are observed. The materials have been tested before and after the adsorption process at high pressure...

Hydrogen is a zero greenhouse gas emission fuel. It can be produced by dissociating water by electrolysis or by high-temperature thermochemistry. Other possibilities exist from hydrocarbons, alcohols or biomass: reforming, partial oxidation and gasification. The CO2 emitted by these methods can be captured and stored. The hydrogen produced by the d...

Hydrogen has its most important application in fuel cells (FC), their powers ranging from the W (portable) to the MW (building electrical equipment). These uses require that the hydrogen be stored, transported and made available in the form of a gas compressed, liquid, or combined in solid materials. Its flammability and explosiveness require preca...

The selective adsorption of mixture components is an important property of adsorbent materials for the purification and possible capture of combustion effluents. The selectivity of an adsorbent can vary strongly with the characteristics of its pore network. This study is devoted to determine the variation of the selective adsorption between the mic...

The adsorption data of the pure gases methane, ethylene and hydrogen on two types of zeolites and two types of activated carbon materials were measured using a volumetric method at 293 K and at pressure up to 26.8 MPa. Four different approaches were tested for description of the experimental equilibrium data. Based on the experimental data obtained...

Single-walled carbon nanotube (SWCNT) polyvinylimidazole (PVI) composites have been prepared by in situ emulsion polymerization. Dispersion of raw SWCNTs in the PVI matrix was improved by surface modification of the SWCNTs using nitric acid treatment and air oxidation. The carbonyl-terminated SWCNTs were covalently bonded to PVI by in situ polymeri...

The possibility of application of new materials for storage of hydrogen in automotive industry is examined Materials are active carbon AC35 in whose structure, particles from various metals: Ni, Ni + La and Ni + MM are implanted. The last mentioned material called “mixed metal MM” contains approximately 51% La, 33% Ce, 12% Nd, 4% Pr. The study of t...

A mathematical model with four parameters describing the adsorption equilibrium of supercritical gases on microporous adsorbents in a wide range of pressures is studied. Numerical experiments related to determining the model parameters by nonlinear regression process of experimental data are carried out. From a physical point of view for a particul...

The hydrogen adsorption on basal graphite planes functionalized by hydrogen atoms is studied by molecular modeling and numerical simulation at temperatures of 77K and 293K up to high pressure. At 77K and pressure of 1MPa, on such an adsorbing surface, the excess hydrogen physisorption is estimated equal to ∼7.0wt%. At 293K and 30MPa, the excess phy...

Afin de pallier la nature intermittente et aléatoire des énergies renouvelables, le projet CESTAR propose d'étudier la solution du stockage tampon d'hydrogène pressurisé. Il s'intéresse au système électrolyseur / stockage tampon en hydrogène sous pression dans des tronçons de canalisation dédiés. Le projet CESTAR vise plus précisément à étudier les...

Scientific work published in Food Science, Engineering and Technologies.

The synthesis of single wall nanotubes (SWNT)/poly(vinyl)triazole (PVTri) composites by in situ emulsion polymerization method and its chemical and physical properties were investigated throughout this work. The surface modification of the SWNT by nitric acid treatment and air oxidation has improved the dispersion of the SWNT in the PVTri matrix. T...

Scientific work published in Food Science, Engineering and Technologies.

Proceedings from ICCE 2010 https://www.research.manchester.ac.uk/portal/en/publications/icce2010-10th-international-conference-on-clean-energy-proceedings(f5569566-e343-4cd1-90ef-26f3b23839ab)/export.html

In this paper, we discussed the potential of hydrogen adsorption by three types of carbon materials (GNF, SWNT and AC) in relation with their surface reactivity due to their nanometric pore dimension. We realized experimental studies of hydrogen adsorption measurements on a high accuracy gravimetric device up to 5 MPa on a series of chemically acti...

Studies in material science and gas adsorption

This paper deals with hydrogen storage issues and reports the high-pressure technological advancement performed to date at a laboratory scale in two distinct domains. For on-board storage applications, the developments enter the scope of the adsorption approach that relates to materials exhibiting high specific areas and microporous volumes; experi...

S.K. Bozbas, S.K. Beyaz, F.D. Lamari, Ü. Ay CO2 adsorption analysis on activated carbon at different temperatures IV National Hydrogen Energy Congress (with international participation) Book of Abstract page 379

In this article, we present a new approach to describe adsorption equilibrium of pure gases in a wide range of pressure. This approach is based on a simple statistical mechanics treatment combining the potential theory and lattice fluid models. The obtained equation for the calculation of the excess adsorption can predict the curve progression of i...

This paper presented results of a study in which hydrogen adsorption isotherm modeling was used to measure hydrogen storage capacity in fuel cell applications. The results were validated on large surface-area activated carbons, where extreme thermodynamic conditions such as very high pressure and low temperature were combined. The innovative system...

In this work, we discuss the purification of hydrogen by physical adsorption on zeolites Li–LSX exchanged 78%, 83% and 99%. A newly developed adsorption device is applied to the gas–solid adsorption measurements. Isotherms of hydrogen adsorption are gravimetric volumetrically measured at 293.15K up to 5MPa. The accuracy of this new device is compar...

In this paper, we focused on hydrogen adsorption on large surface area solids, combining optimal extreme conditions i.e. very high pressure and low temperature for gas storage process purpose. Therefore, a new volumetric device is elaborated to obtain excess adsorption isotherms at 77 K up to 500 bar. Two activated carbons with different micro-poro...

Using grand canonical Monte-Carlo simulations, the adsorption capacities and isosteric heats of hydrogen on activated carbons, graphite nanofibers, and bundles of carbon nanotubes are estimated for identical thermodynamic states. These computations allow a systematic, meaningful, and unbiased comparison of the adsorption properties of hydrogen in s...

In order to interpret adsorption results of hydrogen storage by adsorption in graphite nanofiber (GNF) materials at molecular scale and to propose optimized structures of graphitic materials, we have realized both experimental and numerical studies of gas adsorption in GNF. The porous materials have been synthesized by CVD method. The adsorption ex...

Full text link https://hal.archives-ouvertes.fr/hal-00513287 The isosteric heat of carbon dioxide adsorption on activated carbon is determined by grand canonical Monte Carlo simulations. The results, obtained at room temperature and low pressure for an adsorbent model with slit-type porosity, show that the isosteric heat depends strongly on the sli...

A new approach for a description of the adsorption equilibrium gas-solid was developed. This method combines the quantum-mechanical treatment of the classical theory of Polanyi and the conception of the lattice gas. This leads to a three parameters equation describing the adsorption equilibrium. A thermodynamical treatment of the temperature depend...

Zeolites are used for many purposes like ion exchange and adsorbent for separation and pre-concentration of trace elements. For example; zeolites can be used as ion-exchangers to remove cationic species from aqueous solutions by replacing them by sodium cations. The Si/Al ratio is important in zeolites for the acidity of the framework, ion exchange...

HYTRAIN Final Workshop HYTRAIN project was funded under the European Commission’s 6th Framework Human Resources and Mobility Programme. The network comprises 18 of the leading European research centres. https://cordis.europa.eu/project/id/512443

Porous materials are gaining interest due to their potential for storing hydrogen via physisorption. In the present work, two carbon fibres, carbonised at 973 and 1273 K, have been chemically activated with KOH and NaOH, in order to obtain materials with optimised characteristics for hydrogen storage application. Highly microporous activated carbon...

Adsorption properties of gram-scale samples of different kind of arc discharge nanotubes were studied, namely: (A) raw collaret collected on the cathode, (B) raw soots collected on the lateral reactor wall, (C) thermally treated soot, and (D) thermally then chemically treated soot. The morphology, structure, and composition of these materials were...

International Conference HYDROGEN MATERIALS SCIENCE AND CHEMISTRY OF CARBON NANOMATERIALS Editors: D. V. Schur, S. Y. Zaginaichenko, T. N. Veziroglu, V. V. Skorokhod. https://www.researchgate.net/publication/325193972_International_Conference_ICHMS2007_httpaheucomuaichms07html? DOI: 10.13140/RG.2.2.17650.86724

Adsorption properties of gram scale samples of different kind of arc discharge nanotubes and graphitic nanofibers were studied. The arc discharge nanotubes are namely: i) raw collaret collected on the cathode, ii) raw soots collected on the lateral reactor wall, iii) thermally and chemically treated soot. The graphitic nanofibers were obtained by C...

Abstract Porous materials are gaining interest due to their potential for storing hydrogen via physisorption. In the present work, two carbon fibres, carbonised at 973K and 1273K, have been chemically activated with KOH and NaOH, in order to obtain materials with optimised characteristics for hydrogen storage application. Highly microporous activat...

Hydrogen is an ideal energy carrier which is considered for future transport, such as automotive applications. In this context storage of hydrogen is one of the key challenges in developing hydrogen economy. The relatively advanced storage methods such as high-pressure gas or liquid cannot fulfill future storage goals. Chemical or physically combin...

The topic of this work is to compare several experimental methods such as volumetric and volumetric-gravimetric methods for measuring the equilibrium states of pure gases being adsorbed on the surface of solid materials. The investigation of different type methods and their advantages end disadvantages are discussed. The installations used for meas...

3rd Hydrogen Research and Training Network Workshop on behalf of RTN Marie Curie Mobility HYTRAIN Work package Leader Mid-Term Reporting European Commission https://cordis.europa.eu/programme/id/FP6_MOBILITY-1.1

Hydrogen Storage in Novel Activated Carbons and their Performance in an Engineering Environment Project Advancements HyTRAIN Early-Stage Researcher Mirko Kunowsky's thesis work from Universidad de Alicante In collaboration with CNRS LIMHP Villetaneuse (2007) Hydrogen Research and Training Network Workshop on behalf of RTN Marie Curie Mobility HYTRA...

Organisation of the 2nd Workshop on behalf of RTN Marie Curie HYTRAIN Project

Project advancements of HyTRAIN Experienced Researcher Storage of hydrogen is one of the key challenges in developing hydrogen economy. Conventional storage methods such as high-pressure gas or cryogenic liquid hydrogen can not fulfill the set future storage goals. Storage in solid fuel form by chemically or physically combined within materials has...

The adsorption of equimolar binary mixtures of hydrogen-carbon dioxide, hydrogen-methane, and methane-carbon dioxide in porous material models is determined by grand canonical Monte Carlo simulations. The material models have an adsorbent surface similar to that of nanofibers with a herringbone structure. Our main result, which is relevant for hydr...

Recently a new class of crystalline materials which possess a low density and high surface area, so-called Metal-Organic Frameworks (MOFs) have been developed and synthesized [Eddaoudi et al., 2000; Li et al., 1999]. These materials are formed by coordinate bonds from multidentate ligands to mono-or polynuclear metal centres and may have extensive...

Storage of hydrogen is one of the key challenges in developing hydrogen economy. Conventional storage methods such as high-pressure gas or cryogenic liquid hydrogen can not fulfill the set future storage goals. Storage in solid fuel form by chemically or physically combined within materials has potential advantages over other storage methods. There...

Hydrogen storage by adsorption at high pressure on nano-porous materials and comparison with gas compressed up to 700 bar.

The adsorption of molecules in nanotube materials is of fundamental interest because gas storage and separation technologies can benefit from a better understanding of the sorption properties. The large hydrogen storage capacity provided by carbon nanotubes [Dillon et al. 1997] and graphite nanofibers accelerated the worldwide research and developm...

For the H2 production, realized by reformation or partially oxidation of hydrocarbons using the Pressure Swing Adsorption (PSA) as key method, the knowledge of thermodynamic parameters of the used adsorbents like selectivity, heat of adsorption and desorption are magnitudes for the efficiency of the process. For the separation of gas mixtures using...

The large use of hydrogen gas energy depends on its storage which is difficult due to its low compressibility. Solutions have been proposed among them adsorption in carbon nanostructures. But the ability of carbon nanomaterials to store hydrogen still remains a controversial subject. The experimental values reported for gas storage capacity vary fr...

One of the main problem of the use of hydrogen gas as a fuel is its storage efficiency. Storage by adsorption at room temperature is one of the suitable mode for use hydrogen on board vehicles. Thermal effects are induced by adsorption and desorption of the gas during the storage process. We have investigated in this present work the thermal effect...

Proceedings of 1st IHEC Istanbul.

Analysis of hydrogen purification process by adsorption in the dehydrated Na-LSX zeolite is described. New measurements of hydrogen and nitrogen adsorption selectivity of this zeolite have been performed up to a pressure of 20 MPa and at temperatures of 273, 293 and 313 K, by using a gravimetric-volumetric method. Structural characterizations were...

The capture of carbon dioxide produced by combustion of fossil fuels is studied in the aim to reduce the greenhouse gas emission to acceptable levels by various processes including membrane separation or molecular sieves adsorption… Also, in order to minimise CO 2 emissions, renewable resources could be used with the help of hydrogen vector. One po...

Adsorption in porous solids at room or low temperature is one of the possible storage modes of hydrogen gas. The storage efficiency in these materials depends on their physical properties and characteristics, the most important being their adsorption capacity, porosity, density, and the endo- or exothermic character of the adsorption process. In pa...

In this work, we have realized experimental studies of gas adsorption in purified and raw graphitic nano-fibres (GNFs) obtained by CVD method, at a pressure of 20 MPa and a temperature of 293 K. The structural characterizations of these adsorbents have been evaluated by X-ray diffraction, transmission electronic microscopy, specific surface area me...