论文部分内容阅读
研究了xCu 6 %Zn/HZSM 5 (x =0～ 0 9% )系列催化剂对甲烷和丙烷混合气体无氧芳构化反应的催化性能 .结果表明 ,在此系列催化剂上 ,丙烷促进了甲烷的活化 ,使之参与到芳烃的形成过程中 .在 6 0 0℃和甲烷 /丙烷摩尔比为 1 0的条件下 ,0 7%Cu 6 %Zn/HZSM 5催化剂表现出最佳活性 ,甲烷转化率达到 36 % ,芳烃选择性达到 85 7% .这说明在Zn/HZSM 5中添加第二组分Cu有助于提高催化剂的活性和稳定性 .考察了反应时间和甲烷 /丙烷摩尔比对甲烷和丙烷转化率及产物分布的影响 .13 CH4同位素示踪实验发现13 C进入到了C6H+ 6,C7H+ 8和C8H+ 10 碎片中 ,这进一步证实甲烷参与了芳烃的形成 .
The catalytic performance of xCu 6% Zn / HZSM 5 (x = 0 ~ 0 9%) series catalysts for the anaerobic aromatization of methane and propane mixtures was studied. The results showed that propane promoted methane Activated to make it participate in the formation of aromatics.The best activity of 0 7% Cu 6% Zn / HZSM 5 catalyst was obtained at 600 ℃ and methane / propane molar ratio of 10, and the methane conversion Reached 36% and the aromatic selectivity reached 85.7%, indicating that the addition of Cu as the second component in Zn / HZSM 5 can improve the activity and stability of the catalyst.We investigated the effects of reaction time and molar ratio of methane to propane on methane and Propane conversion and product distribution.13 CH4 isotope tracing experiments revealed that 13 C entered the C6H + 6, C7H + 8 and C8H + 10 fragments, further confirming that methane is involved in the formation of aromatics.