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用程序升温氧化技术研究了二甲苯异构化反应在HZSM-5和pt/HZSM-5上的积炭行为。结果表明,该反应在HZSM-5上的开始阶段,其积炭量随反应时间线性增加,积炭速率为1.33×10~(-5)g/gcat·min;该反应在Pt/HZSM-5上的积炭量与反应时间呈线性关系,其积炭速率为2.48×10~(-6)g/gcat·min,表明金属Pt的存在抑制了积炭的生成。还对积炭前后催化剂的酸性质及其催化性能进行了研究和关联,得到了有益的信息。
The temperature-programmed oxidation process was used to study the carbon deposition behavior of xylene isomerization on HZSM-5 and pt / HZSM-5. The results show that the carbon deposition rate increases linearly with the reaction time at the initial stage of HZSM-5, and the carbon deposition rate is 1.33 × 10 -5 g / g cat · min. The reaction is carried out in the presence of Pt / HZSM-5 The deposition rate is linear with the reaction time, and the carbon deposition rate is 2.48 × 10 -6 g / gcat · min, indicating that the presence of metal Pt inhibits the formation of coke. The acidity and catalytic performance of the catalyst before and after carbon deposition were also studied and correlated, and useful information was obtained.