生物质气化焦油催化裂解获得高气体能产率的实验研究

STUDY ON GETTING HIGH GAS YIELD BY CATALYTIC CRACKING OF TAR FORM BIOMASS GASIFICATION

以生物质催化裂解获得高气体能产率为目标，借助两级固定床热解装置研究生物质的催化裂解特性。以锯末为生物质原料，以特种焦、煅烧后的白云石和高铝质多孔熟料为催化剂，热解温度为700％，催化裂解温度范围为700～90℃。结果表明：特种焦较煅烧后的白云石和高铝质多孔熟料在生物质焦油转化率、气体能产率等方面具有明显优势。借助扫描电镜（SEM）观察3种催化剂的微观结构，分析催化剂的微观结构对生物质气体能产率的影响。

The catalytic cracking characteristics were investigated in a home-made two-stage fixed bed reactor with the special coke, calcined dolomite, and porous high-alumina clinker. The purpose of the present research work was to get high gas yield by catalytic cracking reaction of biomass. Experiments were conducted at pyrolysis temperature of 700℃ and catalytic cracking temperature ranging from 700 to 900℃ using sawdust as biomass raw material. The results showed that the special coke is the most effective among three kinds of catalysts on tar conversion rate and gas yield, etc. The microstructure of catalysts was observed by scanning electron microscopy （SEM）, and influence of the microstructure on gas yield of biomass was studied.