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
收藏
页码：257 / 261
页数：5
相关论文
共 17 条
[1]   ADSORPTION OF ASPHALTENES AND RESINS ON ORGANIC AND INORGANIC SUBSTRATES AND THEIR CORRELATION WITH PRECIPITATION PROBLEMS IN PRODUCTION WELL TUBING [J].
ACEVEDO, S ;
RANAUDO, MA ;
ESCOBAR, G ;
GUTIERREZ, L ;
ORTEGA, P .
FUEL, 1995, 74 (04) :595-598
[2]   A study of multilayer adsorption of asphaltenes on glass surfaces by photothermal surface deformation. Relation of this adsorption to aggregate formation in solution [J].
Acevedo, S ;
Castillo, J ;
Fernandez, A ;
Goncalves, S ;
Ranaudo, MA .
ENERGY & FUELS, 1998, 12 (02) :386-390
[3]   Importance of asphaltene aggregation in solution in determining the adsorption of this sample on mineral surfaces [J].
Acevedo, S ;
Ranaudo, MA ;
García, C ;
Castillo, J ;
Fernández, A ;
Caetano, M ;
Goncalvez, S .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2000, 166 (1-3) :145-152
[4]   Thermo-optical studies of asphaltene solutions:: evidence for solvent-solute aggregate formation [J].
Acevedo, S ;
Ranaudo, MA ;
Pereira, JC ;
Castillo, J ;
Fernández, A ;
Pérez, P ;
Caetano, M .
FUEL, 1999, 78 (09) :997-1003
[5]   New techniques and methods for the study of aggregation, adsorption, and solubility of asphaltenes.: Impact of these properties on colloidal structure and flocculation [J].
Castillo, J ;
Fernández, A ;
Ranaudo, MA ;
Acevedo, S .
PETROLEUM SCIENCE AND TECHNOLOGY, 2001, 19 (1-2) :75-106
[6]  
Collins S. H., 1983, SPE- 11800- MS, DOI [10.2118/11800-MS, DOI 10.2118/11800-MS]
[7]   INTERACTIONS BETWEEN A BITUMEN, ITS COMPONENTS AND MODEL FILLERS [J].
FRITSCHY, G ;
PAPIRER, E .
FUEL, 1978, 57 (11) :701-704
[8]  
GILES CH, 1970, J APPL CHEM, V20, P37
[9]   ASPHALTENES ADSORPTION BY QUARTZ AND FELDSPAR [J].
GONZALEZ, G ;
MIDDEA, A .
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY, 1987, 8 (5-6) :525-548
[10]   Fractionation of asphaltene by complex formation with p-nitrophenol.: A method for structural studies and stability of asphaltene colloids [J].
Gutiérrez, LB ;
Ranaudo, MA ;
Méndez, B ;
Acevedo, S .
ENERGY & FUELS, 2001, 15 (03) :624-628
12