INFLUENCE OF THE SUPPORT OF COMO SULFIDE CATALYSTS AND OF THE ADDITION OF POTASSIUM AND PLATINUM ON THE CATALYTIC PERFORMANCES FOR THE HYDRODEOXYGENATION OF CARBONYL, CARBOXYL, AND GUAIACOL-TYPE MOLECULES

被引:261
作者
CENTENO, A [1 ]
LAURENT, E [1 ]
DELMON, B [1 ]
机构
[1] UNIV CATHOLIQUE LOUVAIN,UNITE CATALYSE & CHIM MAT DIVISES,B-1348 LOUVAIN,BELGIUM
关键词
D O I
10.1006/jcat.1995.1170
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The present work corresponds to part of a program aimed at upgrading oil obtained by pyrolysis of biomass by hydrotreatment (hydrodeoxygenation HDO). CoMo sulfide catalysts, nonsupported, supported on different supports (alumina, carbon, silica), or modified by K or Pt, were used. We used a model reacting mixture containing compounds representative of the molecules that must react to permit a primary stabilisation of the pyrolytic oil: 4-methylacetophenone (4-MA), diethylsebacate (DES), and guaiacol (GUA). In the reaction of the carbonyl group of the 4-MA it is shown that no important role is played by any acid-base mechanism; dispersion determines the activity. Acidity of the support influences the formation of active sites for decarboxylation and hydrogenation of the carboxyl group of DES. It was confirmed that guaiacol-type molecules lead to coking reactions. The role of acidity in the mechanism of these reactions is confirmed, but the modifications made in the catalysts in this work are still not sufficient to control coke deposition. The catalysts supported on carbon lead to the direct elimination of the methoxyl group of the guaiacol. Carbon, on the whole, seems to be a promising support. This work suggests that appropriate modifications of the hydrotreating catalysts can lead to a more effective process for stabilisation of the bio-oils by reaction with hydrogen. (C) 1995 Academic Press, Inc.
引用
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页码:288 / 298
页数:11
相关论文
共 55 条
[1]  
BAKER EG, 1988, RESEARCH IN THERMOCHEMICAL BIOMASS CONVERSION, P883
[2]  
BARBIER J, 1984, B SOC CHIM FR, V1, P250
[3]  
BREDENBERG JB, 1988, J CHEM TECHNOL BIOT, V42, P221
[4]   HYDROGENOLYSIS OF DIFFERENTLY SUBSTITUTED METHOXYPHENOLS [J].
BREDENBERG, JB ;
HUUSKA, M ;
TOROPAINEN, P .
JOURNAL OF CATALYSIS, 1989, 120 (02) :401-408
[5]   HYDROGENOLYSIS AND HYDROCRACKING OF THE CARBON OXYGEN BOND .1. HYDROCRACKING OF SOME SIMPLE AROMATIC O-COMPOUNDS [J].
BREDENBERG, JBS ;
HUUSKA, M ;
RATY, J ;
KORPIO, M .
JOURNAL OF CATALYSIS, 1982, 77 (01) :242-247
[6]  
CANDIA R, 1981, B SOC CHIM BELG, V90, P1225
[7]  
CECKIEWICZ S, 1987, J CATAL, V108, P294
[8]   DYNAMIC PROCESSES IN ACTIVE PHASE SUPPORT INTERACTIONS [J].
DELMON, B .
JOURNAL OF MOLECULAR CATALYSIS, 1990, 59 (02) :179-206
[9]  
ELLIOTT DC, 1987, ENERGY BIOMASS WASTE, V10, P765
[10]  
ELLIOTT DC, 1985, 20TH IECEC MIAM BEAC