生物质焦油模型化合物催化转化实验研究

以苯和甲苯为焦油的模型化合物，在固定床反应器上研究了堇青石和白云石两种催化剂作用下，温度、蒸汽量和空速对焦油催化转化的影响。结果表明，苯和甲苯的转化率都随温度的提高和空速的降低而升高。在堇青石和白云石催化作用下，甲苯在裂解温度900℃，S/C摩尔比为1.5时转化率最高，转化率均达到95%。苯在裂解温度900℃，S/C摩尔比为1.0时转化率最高，转化率分别为61%和53%。蒸汽量的增大有助于裂解气体成分的调整。堇青石稳定性实验表明，积炭是造成催化剂活性降低的重要原因。

Catalytic conversion of model compounds of biomass tar

Using benzene and toluene as model compounds of biomass tar, the effect of temperature, steam content and space velocity on catalytic conversion were investigated in a fixed bed reactor over dolomite and cordierite catalyst. The results indicate that the conversion rate is improved with increasing temperature and decreasing space velocity. At 900℃, the conversion of toluene over cordierite and dolomite catalyst could reach 95%, using a molar ratio of steam/carbon (S/C mol ratio) equal to 1.5. At the same reaction temperature, the conversion of benzene over cordierite and dolomite catalyst could reach 61% and 53% separately, using a molar ratio of S/C mol ratio equal to 1.0. High steam content is favorable to adjust gas component. Stability experiment indicates that coke deposition is the key reason for catalyst deactivation.