Adsorption mechanism of furfural onto modified rice husk charcoals / 生物工程学报
Chinese Journal of Biotechnology
;
(12): 1492-1500, 2015.
Artigo
em Chinês
| WPRIM
| ID: wpr-337472
ABSTRACT
To evaluate the absorptive characteristics of furfural onto biomass charcoals derived from rice husk pyrolysis, we studied the information of the structure and surface chemistry properties of the rice husk charcoals modified by thermal treatment under nitrogen and carbon dioxide flow and adsorption mechanism of furfural. The modified samples are labeled as RH-N2 and RH-CO2. Fresh rice husk charcoal sample (RH-450) and modified samples were characterized by elemental analysis, nitrogen adsorption-desorption isotherms, Fourier-transform infrared spectroscopy and Boehm titration. The results show that fresh rice husk charcoal obtained at 450 degrees C had a large number of organic groups on its surface and poor pore structure. After the modification under nitrogen and carbon dioxide flow, oxygenic organics in rice husk charcoals decompose further, leading to the reduction of acidic functional groups on charcoals surface, and the increase of the pyrone structures of the basic groups. Meanwhile, pore structure was improved significantly and the surface area was increased, especially for the micropores. This resulted in the increase of π-π dispersion between the surfaces of rice husk charcoals and furfural molecular. With making comprehensive consideration of π-π dispersion and pore structure, the best removal efficiency of furfural was obtained by rice husk charcoal modified under carbon dioxide flow.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Oryza
/
Propriedades de Superfície
/
Dióxido de Carbono
/
Carvão Vegetal
/
Química
/
Espectroscopia de Infravermelho com Transformada de Fourier
/
Biomassa
/
Adsorção
/
Furaldeído
/
Nitrogênio
Idioma:
Chinês
Revista:
Chinese Journal of Biotechnology
Ano de publicação:
2015
Tipo de documento:
Artigo
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