生物质热裂解气中模型化合物萘的催化转化研究
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摘要: 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。
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关键词:
- 萘 /
- 水蒸气 /
- 一氧化碳 /
- 氢气 /
- Ni-Pt/Al2O3
Abstract: 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 ℃.-
Key words:
- naphthalene /
- steam /
- CO /
- H2 /
- Ni-Pt/Al2O3
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