化工进展2019，Vol.38Issue(3)：1387-1395,9.DOI:10.16085/j.issn.1000-6613.2018-0469
咪唑改性MCM-22分子筛的制备及甲烷无氧芳构化性能
Preparation of imidazole modified MCM-22 molecular sieves and its catalytic performance in methane dehydroaromatization
摘要
Abstract
Imidazole modified MCM-22 molecular sieves (MCM-22-I) were synthesized by hydrothermal synthesis method under dynamic conditions using imidazole as additives. The effect of imidazole on the synthesis of MCM-22 zeolites was investigated. The physicochemical properties of the molecular sieve samples were characterized by FTIR, XRD, SEM, ICP, BET, NH3-TPD, H2-TPR, and TG/DTG. The results showed that MCM-22-I displayed large specific surface area, abundant pore structure and enhanced acidity and the modification by imidazole can reduce the amount of the template agent HMI used. The6 Mo/MCM-22-I and 6 Mo/MCM-22 catalysts were prepared by incipient-wetness impregnation method.The catalytic performance evaluation of the catalysts for methane dehydroaromatization were carried out in a fixed bed reactor under the reaction conditions of 700℃, P = 1 atm and space velocity of 1500 mL/ (g-cat·h). The results showed that methane conversion increased by 24.1％, the formation rate and the selectivity of benzene by using imidazole modified 6 Mo/MCM-22-I catalyst increased by 24.3％ and 10％, respectively, compared with conventional 6 Mo/MCM-22 catalyst.关键词
催化剂/MCM-22/分子筛/咪唑改性/合成/固定床/甲烷无氧芳构化Key words
catalyst/MCM-22/molecular sieves/imidazole modified/synthesis/fixed-bed/methane dehydroaromatization分类
能源科技引用本文复制引用
高佳良,张根,程序,代成义,郝青青,马晓迅..咪唑改性MCM-22分子筛的制备及甲烷无氧芳构化性能[J].化工进展,2019,38(3):1387-1395,9.基金项目
国家自然科学基金重点项目(21536009) （21536009）
陕西省教育厅专项科研计划项目(17JK0777) （17JK0777）
