生物质热裂解气中模型化合物萘的催化转化研究

在常压连续流动固定床反应器上, 以Ni-Pt/Al2O3为催化剂, 研究了水蒸气含量及反应温度对萘的催化转化反应性能的影响。实验发现，反应温度的升高不仅可以提高萘的转化率和CO、H2的产率, 而且可以改善CO的选择性, 但H2的选择性和积碳量降低；随着水蒸气含量的升高，萘的转化率、H2的产率以及H2的选择性均得到提高，但CO的产率和选择性、积碳量有所下降。此外, 随水蒸气含量的升高副产物苯的浓度增大，在反应温度为700 ℃左右时苯的浓度出现极大值。

CATALYTIC CONVERSION OF THE NAPHTHALENE AS THE MODEL COMPOUND IN PYROLYSIS GAS FROM BIOMASS

The effect of steam content and reaction temperature on the catalytic conversion of Naphthalene, which was chosen as the model compound in pyrolysis gas from biomass, has been investigated with a Ni-Pt/Al2O3 catalyst in a fixed bed reactor. It has been confirmed that increasing the reaction temperature not only enhances the conversion of naphthalene and H2-, CO-yield, but also improves the CO-selectivity, however the H2-selectivity and the carbon deposit decrease. High steam content is favorable to increase the naphthalene conversion, the H2-yield and -selectivity, but the CO-yield and -selectivity as well as the carbon deposit decrease with increasing steam content. It is also found that the concentration of benzene, a by-product of naphthalene conversion, increases with the enhanced steam content and reaches a maximum at 700 ℃.