非氧化条件下Mo-Cr/HZSM-5催化剂上的甲烷芳构化反应

THE PERFORMANCE OF METHANE AROMATIZATION ON Mo Cr/HZSM 5 CATALYST

非氧化条件下Ｍｏ┐Ｃｒ／ＨＺＳＭ┐５催化剂上的甲烷芳构化反应＊王冬杰张一平费金华郑小明（杭州大学催化研究所，杭州３１００２８）关键词钼，铬，ＨＺＳＭ－５沸石，甲烷，芳构化，芳烃近年来，甲烷在非氧化条件下催化转化制芳烃已成为甲烷化学利用领域的热门课题．...

The effects of reaction temperature, pretreatment method and Cr loading on methane aromatization over Mo Cr/HZSM 5 catalyst under non oxidizing condition were investigated. The results indicate that when Cr/Mo molar ratio is 0 07, the CH 4 conversion and aromatics selectivity reach 11 6% and 97 2% respectively. Raising temperature is beneficial to the CH 4 conversion and a 15 8% of CH 4 conversion is obtained at 1023 K. The catalyst pretreated with N 2 is better than that with H 2 and CH 4. The NH 3 TPD MS results show that the Mo Cr/HZSM 5 catalyst has more sites of strong acidity and mid strong acidity than Mo/HZSM 5 catalyst. The results of decomposition of isopropanol show that the surface acidity on Mo Cr/HZSM 5 is increased at high temperature. This might be one of the reasons that the activity for methane aromatization is increased over Mo Cr/HZSM 5 catalyst.