Thermal Decomposition of Biomass and Glycerol in Vibro-Liquefied Bed in the Presence of the Catalysts of Deep Oxidation
YU. V. DUBININ,В В N. A. YAZYKOV,В В A. D. SIMONOVВ В andВ В V. A. YAKOVLEV
Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 5, Novosibirsk 630090 (Russia)
Keywords: catalyst of deep oxidation, combustion of solid fuel, pyrolysis, gasification, steam reforming, biomass, glycerol, vibro-liquefied bed, boiling bed
Pages: 389–395
Abstract
Features of the thermal
decomposition (pyrolysis, steam reforming) of carbon-containing raw material in
the vibro-liquefied bed of inert material and in the presence of the catalysts
of deep oxidation were studied. It was shown that the presence of catalysts in
wood pyrolysis ensures more complete transformation of condensable organic
substances (resins) into light gaseous products (СО, Н2, СО2, СН4). For a model
oxygen-containing organic substrate (glycerol), it was shown that the
conversion of glycerol during its steam reforming in pseudo-liquefied bed of
the catalysts of deep oxidation follows several routes including gasification
with the formation of СО, Н2, СО2 and СН4, polycondensation of the
products of glycerol dehydration with the formation of coke, steam gasification
of coke. Similar processes are realized during the combustion of biomass at the
stage of pyrolysis and gasification in the boiling bed. It was shown that
efficient catalysts in the steam reforming of glycerol exhibit high activity in
the process of oxidation of glycerol and biomass. Investigation of the process
of catalytic combustion of aqueous solutions of glycerol showed that the degree
of oxidation reaches 99.3–99.9 % with the use of the catalysts of deep
oxidation. Oxidation process runs with the highest efficiency in the presence
of PK–12–73 catalyst.
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