Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia

PP-31THERMAL CONVERSIONS OF WOOD SAWDUST TO GASEOUSFUELS IN A FLUIDIZED CATALYTIC BEDKuznetsov B.N. 1,2 and Shchipko M.L. 11 Institute of Chemistry and Chemical Technology SB RAS,K. Marx str., 42, Krasnoyarsk, 660049, fax: +7(391)2439342, e-mail: inm@icct.ru2 Siberian Federal University, Svobodny pr., 79, Krasnoyarsk, 660041The selection of catalytically active materials for fluidized bed was made takinginto account the extreme conditions of their work in the studied high temperaturepyrolysis and gasification processes. Different slag materials of metallurgy industryhaving a high mechanical resistance and thermal stability were tested. As it wasfound the Marting slag after the special activation treatment has the best catalyticproperties among the other slag materials.The studied process of syn-gas production from wood sawdust is based on theintegration of carbonization and gasification stages. In the pyrolysis reactor the woodis pyrolized to char product and fuel-gas in fluidized bed of slag catalyst. Then thechar is treated by steam in the gasification reactor for production of syn-gas. Thecirculation of hot char-product between carbonization and gasification reactorssupplies by heat the water stage of char gasification by steam.The optimal technological parameters of carbonization and gasification stageswere selected. They synchronize the work of carbonization and gasification reactorsand provide the maximal yield of syn-gas. Syn-gas produced from wood by thedeveloped integrated carbonization – gasification process has low tar impurities.The studied process of methane-enriched gas production from wood sawdustincludes the next steps. At first the wood particles expose to thermally destruction inthe heated fluidized bed of catalyst with the formation of volatile and solid charproducts. Some part of char reacts with steam, the finest char particles are burned ina combustion chamber. The heat for gasification process is collected from threesources: from overheated steam, from catalytic methanization of produced syn-gasand from combustion of some part of char product. The suggested one-stepgasification process makes it possible to produce from waste wood the methanecontaininggas with calorific value on 30 % higher in comparison with the traditionalsteam gasification process.120