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Sorption and kinetics of CO2 and CH4 in binderless beads of 13X zeolite

Silva, José A.C.; Schumann, Kristin; Rodrigues, A.E.
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
462.15363%
The sorption equilibrium of CO2 and CH4 in binderless beads of 13X zeolite has been investigated between 313 and 373 K and pressure up to 4 atm. The amount adsorbed of CO2 and CH4 is around 5.2 mmol/gads and 1.2 mmol/gads, respectively, at 313 K and 4 atm. Comparing these values with the ones in literature the value of CO2 is 20% higher than in CECA 13X binder pellets. It is also found that isotherms are pronounced Type I for CO2 and almost linear for CH4. The CO2 isotherms were modeled using a simple deviation from Langmuir isotherm that takes into account interaction between adsorbed molecules at adjacent sites (Fowler model) suggesting a moderate repulsion. Henry’s constants range from 143 to 11.1 mmol/gads.atm for CO2 and 0.45 to 0.27 mmol/gads.atm for CH4 between 313 and 373 K, respectively. The heats of sorption at zero coverage are 43.1 kJ/mol for CO2 and 9.2 kJ/mol for CH4. The sorption kinetics has been investigated by the Zero-Length Column technique (ZLC). Recipes to analyze ZLC desorption curves in pellets of adsorbents are reviewed and it is derived a criteria which indicates that for the sorption rate be measured macroscopically the time of the experiment (that should be above a few seconds) is directly calculated with the following expression: t0:1 7:02 10 2 r2c Dc. Based on such criteria it is shown that crystal diffusivity of CO2 in 13X can be measured macroscopically by ZLC...

Adsorption equilibrium and diffusion ofmethane and carbon dioxide on binderless beads of 13X zeolite

Silva, José A.C.; Schumann, Kristin; Rodrigues, A.E.
Fonte: Instituto Politécnico de Bragança Publicador: Instituto Politécnico de Bragança
Tipo: Conferência ou Objeto de Conferência
Português
Relevância na Pesquisa
451.0911%
Equilibrium and kinetics of sorption of CO2 and CH4 on a new type of binderless on of 13X zeolite. The equilibrium data is measured in a breakthrough apparatus and the kinetic data by the ZLC technique.

Sorption of carbon dioxide on binderless beads of 13X

Silva, José A.C.; Schumann, Kristin; Rodrigues, A.E.
Fonte: Instituto Politécnico de Bragança Publicador: Instituto Politécnico de Bragança
Tipo: Conferência ou Objeto de Conferência
Português
Relevância na Pesquisa
549.51656%
The sorption equilibrium of CO2 and CH4 in binderless beads of 13X zeolite has been investigated between 313 and 373 K and pressure up to 4 atm. The amount adsorbed of CO2 and CH4 is around 5.2 mmol/gads and 1.2 mmol/gads, respectively, at 313 K and 4 atm. Comparing these values with the ones in literature the value of CO2 is 20% higher than in CECA 13X binder pellets. The crystal diffusivity of CO2 measured experimentally by the ZLC technique is 5.8×10-15 m2/s and 1.3×10-15 m 2/s at 373 and 313 K, respectively. These values are in the same order magnitude of the ones measured by a frequency response and pulse chromatography techniques reported in literature. The ZLC desorption curves for CH4 were measured under an equilibrium regime and no kinetic data is obtained.

Porous solids for biogas upgrading

Silva, José A.C.; Rodrigues, A.E.
Fonte: CVR - Centro para a Valorização de Resíduos Publicador: CVR - Centro para a Valorização de Resíduos
Tipo: Conferência ou Objeto de Conferência
Português
Relevância na Pesquisa
532.2047%
In this work, we will present sorption equilibrium, kinetic and fixed bed data of CO2, CH4 in MOF-508b and zeolite 13X at 303, 323 and 343 K and partial pressures up to 4.5 bar. These data are fitted with appropriate isotherm models. At the same time single, binary and ternary breakthrough curves were measured to provide required data to develop and validate a mathematical model based on the LDF approximation for the mass transfer, which could be used in the design (simulation) of a cyclic adsorption processes (PSA) for the purification of biogas and CO2 sequestration.

Adsorption and separation of CO2/CH4 on binderless beads of 13X zeolite

Silva, José A.C.; Rodrigues, A.E.
Fonte: Sociedade Portuguesa de Química Publicador: Sociedade Portuguesa de Química
Tipo: Conferência ou Objeto de Conferência
Português
Relevância na Pesquisa
342.92156%
The sorption equilibrium of CO2 and CH4 has been investigated on the binderless beads of 13X zeolite between 313 and 373 K and pressure up to 4 atm. The amount adsorbed of CO2 and CH4 is around 5.2 mmol/gads and 1.2 mmol/gads, respectively, at 313 K and 4 atm. Comparing these values with the ones in literature the value of CO2 is 20% higher than in similar 13X binder pellets.

Purificação de acido clavulanico utilizando zeolitas.; Purification of clavulanic acid using zeolites.

Marcus Bruno Soares Forte
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 25/04/2008 Português
Relevância na Pesquisa
378.60633%
O presente trabalho teve como objetivo principal a separação e purificação de acido clavulanico a partir de caldo fermentado utilizando zeolitas. Foram utilizadas zeolita natural (ZN) e sintetica faujasita (13X), ambas modificadas por troca ionica com diferentes cations de compensação (Na+1, K+1, Ca+2, Ba+2, Mg+2, Sr+2). Atraves de estudos cineticos de adsorcao de AC, usando as diferentes zeolitas nas respectivas formas cationicas, selecionou-se a zeolita 13X-Na como a mais promissora na adsorcao do referido composto. No equilibrio, houve retencao de 17,4% do AC inicial (CAC*/CAC0 = 0,826) e a quantidade de AC adsorvida, em relacao a quantidade de zeolita (q*) foi 0,4927 mg/g. O diametro médio da molecula de AC (DAC) foi estimado em 9,6 A. A zeolita 13X-Na foi caracterizada em termos de composicao (Si/Al = 1,5), densidade (dz = 2,248 g/cm3), área superficial (SBET = 444,860 m2/g), volume total de poros (Vporos = 0,308 cm3/g), volume de microporos (Vmicro = 0,203 cm3/g) e diâmetro médio de poros (Dporos = 28 A). Através desses resultados, a porosidade da particula calculada foi ?p = 0,69. O leito de particulas de 13X-Na apresentou porosidade ?b = 0,85. Soluções de AC puro foram obtidas através de HPLC em escala semi-preparativa. Isotermas de adsorção nas temperaturas 10...

Removal of Cr(VI) from aqueous solutions by a bacterial biofilm supported on zeolite : optimisation of the operational conditions and scale-up of the bioreactor

Pazos, M.; Branco, Mónica; Neves, Isabel C.; Sanromán, M. A.; Tavares, M. T.
Fonte: John Wiley & Sons, Inc. Publicador: John Wiley & Sons, Inc.
Tipo: Artigo de Revista Científica
Publicado em /12/2010 Português
Relevância na Pesquisa
424.94215%
The aim of this study was to investigate the feasibility of a bioreactor system and its scale-up to remove Cr(VI) from solution. The bioreactor is based on an innovative process that combines bioreduction of Cr(VI) to Cr(III) by the bacterium Arthrobacter viscosus and Cr(III) sorption by a specific zeolite. Batch studies were conducted in a laboratory-scale bioreactor, taking into account different operating conditions. Several variables, such as biomass concentration, pH and zeolite pre-treatment, were evaluated to increase removal efficiency. The obtained results suggest that the Cr removal efficiency is improved when the initial biomass concentration is approximately 5 g L–1 and the pH in the system is maintained at an acidic level. Under the optimised conditions, approximately 100 % of the Cr(VI) was removed. The scale-up of the developed biofilm process operating under the optimised conditions was satisfactorily tested in a 150-L bioreactor.; Xunta de Galicia - programa Angeles Alvariño

Optimization of production of extracellular polymeric substances by Arthrobacter viscosus and their interaction with a 13X zeolite for the biosorption of Cr(VI)

Quintelas, C.; Silva, Vitor B. da; Silva, Bruna Andreia Nogueira Airosa; Figueiredo, Hugo; Tavares, M. T.
Fonte: Taylor & Francis Publicador: Taylor & Francis
Tipo: Artigo de Revista Científica
Publicado em /10/2011 Português
Relevância na Pesquisa
459.52414%
In this work we aimed to optimize the production of extracellular polymeric substances (EPS) by an Arthrobacter viscosus biofilm supported on 13X zeolite to be used in the biosorption of Cr(VI). The optimization parameters were agitation rate, work volume, pH and glucose concentration. Following the optimization of EPS production, the biofilm was used in the biosorption of hexavalent Cr from liquid solutions. Differences between the use of dead or active biomass and between the performance of zeolite in powder or in pellet form were also studied. The optimized EPS production allowed values of metal uptake between 2.72 mg/gbiosorbent and 7.88 mg/gbiosorbent for initial Cr(VI) concentrations of 20–60 mg/L. For an initial concentration of 20 mg/L, the optimal conditions of EPS production allowed an increase of 10% on the removal percentage of total Cr, and the use of zeolite as a powder rather than the pelleted form produced an increase of 46.5% in the removal percentage. For the initial concentration of 60 mg/L, the use of active biomass compared to dried biomass allowed a reduction of the time required for the total removal of Cr(VI) from 20 to 13 days.

Chromium (VI) ion adsorption features of chitosan film and its chitosan/zeolite conjugate 13X film

Batista, Anabelle C. L.; Villanueva, Emílio R.; Amorim, Rosa Valéria S.; Tavares, M. T.; Takaki, G. M. Campos
Fonte: MDPI Publicador: MDPI
Tipo: Artigo de Revista Científica
Publicado em //2011 Português
Relevância na Pesquisa
330.80746%
This research evaluated the importance of the adsorption properties of chitosan a chitosan/zeolite conjugate film for the removal of Cr(VI) ions from solutions in the 5–260 mg/L concentration range, when the pH was adjusted to 4.0 and 6.0. The uptake capacities of the films formed by chitosan and by the chitosan/zeolite conjugate were calculated by mass balance. The equilibrium isotherms were fitted to the Langmuir, Freundlich and Redlich-Peterson models. The chitosan film seems to be a good sorbent for Cr(VI) at pH 4, but its physical instability suggests the need for a more resilient support. Due to this fact zeolite was added to the chitosan matrix in solution and a chitosan/zeolite (CS/Zeo) film was thus formed. The solubility of the film and the characterization of the different matrices by FTIR, TGA and X-Ray showed that a cross-linked structure was formed between the chitosan and zeolite and the solubility of the film increased. In this study, the low manufacturing cost of the CS/Zeo matrix, the good uptake of Cr(VI) at acidic pH (17.28 mg/g) and the non desorption of Cr(VI) from the film in water suggests this combination should be tested in industrial environment.

Separação de CO2 por meio da tecnologia PSA

Neves,Célia de Figueiredo Cordeiro; Schvartzman,Mônica Maria de Abreu Mendonça
Fonte: Sociedade Brasileira de Química Publicador: Sociedade Brasileira de Química
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2005 Português
Relevância na Pesquisa
532.2047%
This paper describes the separation of CO2 from a gas mixture containing 25% CO2, 4% O2 and 71% N2 using the pressure swing adsorption (PSA) technique. The adsorbent selected was the zeolite 13X due to its great adsorption capacity for CO2 and selectivity towards the other components of the gas mixture. The experimental technique was designed to identify the most important variables for the process and to optimize it. It is shown that the PSA technique can be used to separate CO2 from O2 and N2 to obtain an effluent containing 2% CO2 with 99% separation efficiency.

Modeling of the fixed - bed adsorption of carbon dioxide and a carbon dioxide - nitrogen mixture on zeolite 13X

Dantas,T. L. P; Luna,F. M. T; Silva Jr,I. J; Torres,A. E. B; de Azevedo,D. C. S.; Rodrigues,A. E; Moreira,R. F.P.M
Fonte: Brazilian Society of Chemical Engineering Publicador: Brazilian Society of Chemical Engineering
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2011 Português
Relevância na Pesquisa
751.0911%
In this study, the fixed - bed adsorption of carbon dioxide and a carbon dioxide - nitrogen mixture on zeolite 13X was investigated. The adsorption equilibrium and breakthrough curves were determined at different temperatures - 301 - 306 K, 323 K, 373 K and 423 K. A model based on the LDF approximation for the mass transfer, considering the energy and momentum balances, was used to describe the adsorption kinetics of carbon dioxide and a carbon dioxide - nitrogen mixture. The model acceptably reproduced all of the breakthrough curves and can be considered as adequate for designing a PSA cycle to separate carbon dioxidenitrogen mixtures.

Evaluation of the zinox and zeolite materials as adsorbents to remove H2S from natural gas

Melo, Dulce Maria de Araújo; Souza, José Roberto de; Melo, Marcus Antonio de Freitas; Martinelli, Antonio Eduardo; Cachima, Gustavo Henrique Bezerra; Cunha, Jardel Dantas da
Fonte: Colloids and Surfaces Publicador: Colloids and Surfaces
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
524.94215%
MELO, Dulce Maria de Araújo et al. Evaluation of the Zinox and Zeolite materials as adsorbents to remove H2S from natural gas. Colloids and Surfaces. A, Physicochemical and Engineering Aspects, Estados Unidos, v. 272, p. 32-36, 2006.; Mesoporous materials can be generally used as adsorbents to remove impurities from gases. During the past few years, H2 S has been removed from natural gas using materials such as dolomite, zeolites, and industrial compounds, which can be widely used by oil and natural gas companies. The present study focused on the use of Zeolite 13X and Zinox 380 as H2 S adsorbent at 25 ◦ C. They were characterized by chemical analyses (X-ray fluorescence and atomic absorption), X-ray diffraction, particle size distribution analyses and FT Infrared spectroscopy. Adsorption reactions were carried out using proposed models. The results revealed that both materials studied could be used as H2 S adsorbents in natural gas exceeding the capabilities of industrial compounds

Avaliação da capacidade de adsorção do CO2 em zeólita 12X com gases sintéticos e originados da pirólise do lodo de esgoto

Lessa, Mayara de Oliveira
Fonte: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Engenharia Química; Pesquisa e Desenvolvimento de Tecnologias Regionais Publicador: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Engenharia Química; Pesquisa e Desenvolvimento de Tecnologias Regionais
Tipo: Dissertação Formato: application/pdf
Português
Relevância na Pesquisa
565.38023%
This work depicts a study of the adsorption of carbon dioxide on zeolite 13X. The activities were divided into four stages: study batch adsorption capacity of the adsorbent with synthetic CO2 (4%), fixed bed dynamic evaluation with the commercial mixture of gases (4% CO2, 1.11% CO, 1 2% H2, 0.233% CH4, 0.1% C3, 0.0233% C4 argon as inert closing balance), fixed bed dynamic modeling and evaluation of the breakthrough curve of CO2 originated from the pyrolysis of sewage sludge. The sewage sludge and the adsorbent were characterized by analysis TG / DTA, SEM, XRF and BET. Adsorption studies were carried out under the following operating conditions: temperature 40 °C (for the pyrolysis of the sludge T = 600 °C), pressures of 0.55 to 5.05 bar (batch process), flow rate of the gaseous mixture between 50 - 72 ml/min and the adsorbent masses of 10, 15 and 20 g (fixed bed process). The time for the adsorption batch was 7 h and on the fixed bed was around 180 min. The results of this study showed that in batch adsorption process step with zeolite 13X is efficient and the mass of adsorbed CO2 increases with the increases pressure, decreases with temperature increases and rises due the increase of activation temperature adsorbent. In the batch process were evaluated the breakthrough curves...

Abatement of dilute methane using combined ozone and Pd-ion-exchanged zeolite

Hui, K.; Kwong, C.; Chao, C.
Fonte: Engineers Australia; Australia Publicador: Engineers Australia; Australia
Tipo: Conference paper
Publicado em //2010 Português
Relevância na Pesquisa
432.6672%
Dilute methane emissions found in industrial exhausts such as waste water treatment plants and coal mine ventilation systems are problematic for energy recovery, while their quantity imposes significant global warming effects. In this study, the catalytic combustion of methane with combined ozone and Pd-ion-exchanged zeolite was investigated. Without zeolite, gas phase reaction among methane, air and ozone gave 1-11% of methane conversion at 295-435 oC. The presence of inlet ozone (1-4 vol%) to the zeolite 13X system enhanced methane removal efficiency by 24-56%, giving overall performance of 93% in this low temperature range. There existed a range of reaction temperature where methane conversion was most enhanced by ozone in the zeolite system. Without ozone, methane oxidation showed an activation energy of 136 kJ/mol. This was reduced to 116 kJ/mol by using 4 vol% of ozone. The enhanced methane removal was attributed to the decomposition of ozone to form atomic oxygen reacting with adsorbed methane. Higher methane conversion was observed at lower space velocities under various inlet ozone concentrations indicating the importance of mass diffusion of ozone and methane to the active sites in the zeolite. As the inlet ozone and methane concentration increased...

Catalytic combustion of methane with ozone using Pd-exchanged zeolite X: Experimental investigation and kinetics model

Wan, M.; Hui, K.; Chao, C.; Kwong, C.
Fonte: Taylor & Francis Ltd Publicador: Taylor & Francis Ltd
Tipo: Artigo de Revista Científica
Publicado em //2010 Português
Relevância na Pesquisa
519.91477%
The authors experimentally investigated the catalytic combustion of methane on a 3-wt%-Pd-ion-exchanged zeolite 13X catalyst under various reaction temperatures, ozone/methane concentration ratios, and gas hourly space velocities. A model based on Langmuir-Hinshelwood kinetics was developed to analyze the performance of the system. Without the catalyst, the activation energy for methane oxidation with ozone is 148 kJ/mol. Adding catalysts but using oxygen only as oxidant, the activation energy reduces to 114 kJ/mol. Adding ozone to the system greatly reduces the activation energy to 63 kJ/mol. The enhanced methane conversion by adding ozone with catalysts could be attributed to the decomposition of ozone to atomic oxygen species. With the catalyst, at temperatures below 400°C, methane conversion is mainly achieved by reaction with ozone. Adding ozone at this low temperature range can enhance the energy efficiency of methane conversion. Reaction with oxygen becomes increasingly important at higher temperature and becomes the dominant mechanism at above 500°C.; M. P. Wan, K. S. Hui, Christopher Y. H. Chao, C. W. Kwong

Use of multi-transition metal-ion-exchanged zeolite 13X catalysts in methane emissions abatement

Hui, K.; Chao, C.; Kwong, C.; Wan, M.
Fonte: Elsevier Science Inc Publicador: Elsevier Science Inc
Tipo: Artigo de Revista Científica
Publicado em //2008 Português
Relevância na Pesquisa
532.2047%
K.S. Hui, C.Y.H. Chao, C.W. Kwong, M.P. Wan

Utilization of Fly-Ash Products from Biomass Co-Combustion and Zeolite 13X for Building Energy Conservations

Kwong, C.; Chao, C.
Fonte: Springer; Verlag, Berlin Publicador: Springer; Verlag, Berlin
Tipo: Parte de Livro
Publicado em //2009 Português
Relevância na Pesquisa
562.71348%
Catalytic ozonation of volatile organic compounds (VOCs) using biomass combustion derived fly-ash products and zeolite 13X was investigated for applications in an integrated air purification and desiccant cooling system. Fly-ash products from rice husk- coal co-combustion at different biomass blending ratios were used. The material characteristics such as metal content and surface area were compared and correlated with the catalytic activities. It was found that the surface area and the metal constitutes have made the catalytic activities over the fly-ash products from biomass combustion superior to that from coal-only combustion. The elevated reaction temperatures from 25 o C to 75 o C also have significant effects to the catalytic activities. On the other hand, the potential synergy to Zeolite 13X was explored. The combined catalytic ozonation and adsorption not only enhance VOCs removal, but also minimize intermediate species emission. Furthermore, the hydrophilic properties of Zeolite 13X can be utilized to handle the latent load of the conventional air conditioning system for energy conservations.; C. W. Kwong and C. Y. H. Chao

Selection of adsorbents for CO2 recovery from process gas streams using pressure swing adsorption processes; Selección de adsorbentes para la recuperación de CO2 a partir de gases de proceso mediante adsorción con oscilación de presión

Castro González, Sergio
Fonte: Universidade de Cantabria Publicador: Universidade de Cantabria
Tipo: Trabalho de Conclusão de Curso
Português
Relevância na Pesquisa
349.51656%
RESUMEN: Este Trabajo Fin de Grado se enmarca dentro de las prácticas realizadas en la empresa Solvay de Torrelavega. El objetivo es el estudio de la técnica de adsorción por oscilación de presión (PSA) para su aplicación en la captura y concentración de CO2 en corrientes de proceso, así como la realización de un estudio preliminar para la elección del adsorbente en dos casos representativos de la industria química. En este trabajo fin de grado se ha realizado una revisión del estado del arte sobre los materiales adsorbentes de CO2, principalmente carbonáceos y zeolitas. El segundo punto estudiado es la configuración del ciclo PSA, tanto el ciclo básico como las modificaciones que se pueden realizar. En el último apartado de este Trabajo Fin de Grado se realiza una selección preliminar entre los dos adsorbentes más empleados en la industria: carbón activo y zeolita 13X. La principal conclusión que deriva del estudio preliminar realizado es que la zeolita 13X es más ventajosa desde el punto de vista operacional que el carbón activo.; ABSTRACT: This Degree Final Project is part of the practices in the company Solvay Torrelavega. The aim is to study the technique of Pressure Swing Adsorption (PSA) for application in capture and CO2 concentration in process streams as well as conducting a preliminary study for the choice of adsorbent in two representative cases in chemical industry. In this Degree Final Project it has conducted a review of the state of the art on CO2 adsorbent materials. We can distinguish two main types: carbonaceous and zeolites. The second important issue is the configuration of the PSA cycle. In this document the basic cycle and the possible modifications are studied. In the last section a preliminary study of the adsorbents zeolite 13X and activated carbon is performed. The main conclusion obtain is that the zeolite 13X is more advantageous from an operational point of view than the activated carbon.; Grado en Ingeniería Química

To Investigate the absorption, dynamic contact angle and printability effects of synthetic zeolite pigments in an inkjet receptive coating

Jalindre, Swaraj
Fonte: Rochester Instituto de Tecnologia Publicador: Rochester Instituto de Tecnologia
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
437.73914%
Ink absorption performance in inkjet receptive coatings containing synthetic zeolite pigments was studied. Coating pigment pore and particle size distribution are the key parameters that influence in modifying media surface properties, thus affecting the rate of ink penetration and drying time (Schölkopf, et al. 2004). The primary objective of this study was: (1) to investigate the synthetic zeolite pigment effects on inkjet ink absorption, dynamic contact angle and printability, and (2) to evaluate these novel synthetic zeolite pigments in replacing the fumed silica pigments in conventional inkjet receptive coatings. In this research study, single pigment coating formulations (in equal P:B ratio) were prepared using microporous synthetic zeolite pigments (5A, Organophilic and 13X) and polyvinyl alcohol (PVOH) binder. The laboratory-coated samples were characterized for absorption, air permeance, roughness, drying time, wettability and print fidelity. Based on the rheological data, it was found that the synthetic zeolite formulated coatings depicted a Newtonian flow behavior at low shear; while the industry accepted fumed silica based coatings displayed a characteristically high pseudoplastic flow behavior. Our coated samples generated using microporous synthetic zeolite pigments produced low absorption...

Binary adsorption of CO2/CH4 in binderless beads of 13X zeolite

Silva, José A.C.; Cunha, Adelino F.; Schumann, Kristin; Rodrigues, A.E.
Fonte: Wiley Publicador: Wiley
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
557.68605%
The binary sorption CO2 and CH4 in binderless beads of 13X zeolite has been investigated between 313 and 473 K and total pressure up to 5 atm through fixed bed adsorption experiments. The amount adsorbed of CO2 and CH4 is around 4.7 mmol/gads and 0.4 mmol/gads, respectively, at 313 K and 3.7 atm in a 50/50 equimolar mixture. In a 25(CO2)/75(CH4) mixture the amount adsorbed is 4.0 and 0.84 mmol/g at the same temperature and pressure. Experimental selectivities CO2/CH4 range from 37 at a low pressure of 0.667 atm to approximately 5 at the high temperature of 423 K. Comparing these values with the ones in literature CO2 adsorption capacity is 20% higher than in CECA 13X binder pellets. The CO2/CH4 binary isotherms were fitted with the extended Fowler model that takes into account interaction between adsorbed molecules at adjacent sites suggesting a moderate attraction between CO2 and CH4. The model is validated through a graphical method using the single component isotherm parameters. The breakthrough curves measured show a plateau of pure CH4 of approximately 6 min depending of the operating conditions chosen.