Y改性Mo/HZSM-5催化剂上甲烷直接芳构化反应性能的研究

Study on the performance of methane aromatization over Y modified Mo/HZSM 5 catalyst

研究了稀土元素Ｙ对Ｍｏ／ＨＺＳＭ－５催化剂的活性和选择性的影响，发现适量的稀土元素Ｙ促进了催化剂的活性，提高了甲烷的转化率及苯的选择性，在１０２３Ｋ时，甲烷的芳构化转化率达１９．６％，苯的选择性达９６．５％，且催化剂活性较稳定。失活催化剂经氢气脱炭再生后，活性较稳定，说明催化剂失活的主要原因是表面积炭。

The effect of rare earth element Y on activity and selectivity of the Mo/HZSM 5 catalyst has been investigated.The results show that an appropriate quantity of Y can improve the activity of the catalyst, conversion of methane and selectivity to benzene, and thus for aromatization at 1023K, the conversion and selectivity are about 19.6% and 96.5 %, respectively, while the activity of the catalyst keeping stable. The main cause of catalyst deactivation is carbon deposition on the surface of the catalyst, and the deactivated catalyst can be regenerated by hydrogen treatment for removal of carbon deposits.