Ni改性Mo／HZSM－5催化剂上甲烷芳构化性能研究

Study on the Performance of Methane Aromatization of Ni Modification of Mo/HZSM-5 Catalyst

Ｎｉ改性Ｍｏ／ＨＺＳＭ－５催化剂上甲烷芳构化性能研究王冬杰，张一平，费金华，郑小明（杭州大学催化研究所，杭州，３１００２８）关键词甲烷，Ｍｏ－Ｎｉ／ＨＺＳＭ－５催化剂，芳构化，芳烃由于甲烷氧化偶联和部分氧化遇到了转化率和选择性不易兼顾及甲烷深度氧化难...

The effects of conversion of CH4 over Mo-Ni/HZSM-5 catalysts under a non-oxidizing condition with different temperatures,different conditions of pretreatment and different loadings of Ni were investigated.The results indicate that when Ni/Mo molar ratio is 0.05,the conversion of CH4 at 973 K can reach 11.3%,and the selectivity of aromatic hydrocarbon can reach 97.1%It′s shown that adding a certain quantity of Ni is beneficial to the conversion of CH4,the maximun conversion of CH4 at 1023 K can reach 15.9%.The effect of reaction with pretreatment by using N2 is better than that in the cases of H2,CH4 or air.The results of NH3-TPD-MS show that the centre numberes of strong acidity and weak acidity both on the Mo-Ni/HZSM-5 catalysts are more than that on the Mo/HZSM-5 catalyst.This might be one of the reasons that the activity of methane aromatization is increased over Mo-Ni/HZSM-5 catalyst.