Adsorption of asphaltenes at the toluene-silica interface:: A kinetic study

被引：67

作者：

Acevedo, S ^{[1
]}

Ranaudo, MA

García, C

Castillo, J

Fernández, A

机构：

[1] Cent Univ Venezuela, Fac Ciencias, Escuela Quim, Lab Fisicoquim Hidrocarburos, Caracas 1041, Venezuela

[2] Cent Univ Venezuela, Fac Ciencias, Escuela Quim, Lab Espectroscopia Laser, Caracas 1041, Venezuela

来源：

ENERGY & FUELS | 2003年 / 17卷 / 02期

关键词：

D O I：

10.1021/ef020104q

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The adsorption kinetics of asphaltenes at the toluene-silica interface has been measured for nine solution concentrations C-S (from 5 to 3000 mgL(-1)) Results could be adjusted to an irreversible second-order adsorption kinetics, where the adsorption rate k was strongly dependent on concentration. Thus a large reduction in k was observed when C-S was increased in the studied concentration range. This rate reduction was accounted for in terms of adsorption of aggregates formed in solution. The step-wise trends observed for the adsorption isotherms of asphaltenes on mineral surfaces, could be reproduced using the above k values.

引用

页码：257 / 261

页数：5

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