Catalytic conversion of model compounds of biomass tar
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摘要: 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。Abstract: 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.
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Key words:
- biomass /
- tar /
- catalytic /
- cordierite
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