Idioma:

CO2 adsorption in amine-grafted zeolite 13X

Bezerra, Diôgo P. ; Silva, Francisco W.M. da ; Moura, Pedro A.S. de ; Sousa, Allyson G.S. ; Vieira, Rodrigo S. ; Rodriguez-Castellon, Enrique ; Azevedo, Diana C.S.

Applied surface science, 2014-09, Vol.314, p.314-321 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

Texto completo disponível

Citações Citado por

Enviar para

Título:
CO2 adsorption in amine-grafted zeolite 13X
Autor: Bezerra, Diôgo P. ; Silva, Francisco W.M. da ; Moura, Pedro A.S. de ; Sousa, Allyson G.S. ; Vieira, Rodrigo S. ; Rodriguez-Castellon, Enrique ; Azevedo, Diana C.S.
Assuntos: Adsorbents ; Adsorption ; Amine ; Carbon dioxide ; CO2 adsorption ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; Heat of adsorption ; Isotherms ; Physics ; Surface chemistry ; X-ray photoelectron spectroscopy ; Zeolite 13X ; Zeolites
É parte de: Applied surface science, 2014-09, Vol.314, p.314-321
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: •CO2 adsorption mechanism in amine-grafted zeolite 13X was investigated.•The loaded amine tends to fill zeolite micropores and most of it is unaccessible to react with CO2.•Part of loaded MEA binds covalently to the zeolitic structure and will not detach from the surface even at low pressures.•Chemisorption is likely to lead to CO2 higher uptakes upon a rise in temperature for solids with the highest amine load. The adsorption of CO2 on Zeolite 13X functionalized with amino groups was studied. Adsorbent functionalization was carried out by grafting with different loads of monoethanolamine (MEA). The adsorbents were characterized by N2 adsorption/desorption isotherms at 77K, x-ray diffraction, TGA, in situ FTIR, XPS and adsorption microcalorimetry. CO2 isotherms were studied in a gravimetric device up to 10bar at 298 and 348K. It was found that increasing loads of amine to the adsorbent tend to reduce micropore volume of the resulting adsorbents by pore blocking with MEA. There is experimental evidence that part of the loaded MEA is effectively covalently bonded to the zeolitic structure, whereas there is also physisorbed excess MEA which will eventually be desorbed by raising the temperature beyond MEA boiling point. Heats of adsorption at nearly zero coverage indicate that some of the adsorbed CO2 reacts with available amino groups, which agrees with the finding that the adsorption capacity increases with increasing temperature for the modified zeolite with the highest MEA load.
Editor: Amsterdam: Elsevier B.V
Idioma: Inglês

Links

View record in Pascal Francis

Voltar para lista de resultados

Anterior Resultado 9 Avançar Ir para próxima página

Realização: Logos de Redes Sociais:

CO2 adsorption in amine-grafted zeolite 13X

Bezerra, Diôgo P. ; Silva, Francisco W.M. da ; Moura, Pedro A.S. de ; Sousa, Allyson G.S. ; Vieira, Rodrigo S. ; Rodriguez-Castellon, Enrique ; Azevedo, Diana C.S.

Amsterdam: Elsevier B.V

Buscando em bases de dados remotas. Favor aguardar.