skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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

Abstract

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. The authors used a model reacting mixture containing compounds representative of the molecules that must react to permit a primary stabilisation of the pyrolytic oil: 4-methy lacetophenone (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 leadmore » to a more effective process for stabilisation of the bio-oils by reaction with hydrogen. 55 refs., 3 figs., 5 tabs.« less

Authors:
; ;  [1]
  1. Universite Catholique de Louvain, Louvain-la-Neuve (Belgium)
Publication Date:
OSTI Identifier:
111023
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 154; Journal Issue: 2; Other Information: PBD: Jul 1995
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; COBALT ALLOYS; CATALYTIC EFFECTS; MOLYBDENUM ALLOYS; ORGANIC OXYGEN COMPOUNDS; REDUCTION; BIOMASS; PROCESSING; CATALYST SUPPORTS; ALUMINIUM OXIDES; POTASSIUM; PLATINUM; CARBON

Citation Formats

Centeno, A., Laurent, E., and Delmon, B. 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. United States: N. p., 1995. Web. doi:10.1006/jcat.1995.1170.
Centeno, A., Laurent, E., & Delmon, B. 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. United States. doi:10.1006/jcat.1995.1170.
Centeno, A., Laurent, E., and Delmon, B. Sat . "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". United States. doi:10.1006/jcat.1995.1170.
@article{osti_111023,
title = {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},
author = {Centeno, A. and Laurent, E. and Delmon, B.},
abstractNote = {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. The authors used a model reacting mixture containing compounds representative of the molecules that must react to permit a primary stabilisation of the pyrolytic oil: 4-methy lacetophenone (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. 55 refs., 3 figs., 5 tabs.},
doi = {10.1006/jcat.1995.1170},
journal = {Journal of Catalysis},
number = 2,
volume = 154,
place = {United States},
year = {1995},
month = {7}
}