摘要
在脉冲微反色谱装置上,用正己烷、3-甲基戊烷、十氢化萘及环己烷为原料,考察了HZSM-5分子筛及催化剂的择形裂化性能及氢转移反应性能。结果表明,新鲜HZSM-5分子筛具有良好的择形性,高温水热处理后,择形性下降。氢转移反应能力降低。提高反应温度不利于择形裂化反应及氢转移反应。氢转移反应越低,丙烯及丁烯等烯烃选择性越高。芳烃不仅通过分子间氢转移反应生成,而且通过直接脱氢芳构化反应生成。根据实验结果,提出了烃类在HZSM-5分子筛上的择形催化裂化模型及环己烷在HZSM-5催化剂上的反应网络。
The shape selective cracking reaction and hydrogen transfer reaction have been conducted with n- hexane, 3-methylpentane, decalin and cyclohexane over HZSM-5 catalyst in a micro pulse reactor. The fresh HZSM-5 demonstrates good shape selectivity. Both the shape selectivity and hydrogen tran- fer activity decrease with hydrothermal treatment as well as increasing reaction temperature. Propy- lene and butylene yields increase with low hydrogen transfer reaction. Aromatics formation are formed not only via the hydrogen transfer reaction between the molecules but also by dehydrogenation and aromatization. Based on these results, a shape selective catalytic cracking model of hydrocarbons and a reaction network of cyclohexane on HZSM-5 catalyst are suggested.
出处
《石油炼制》
CSCD
1992年第9期12-17,共6页
