燃料化学学报2017，Vol.45Issue(11)：1349-1355,7.
不同硅铝比Al-ITQ-13分子筛的甲醇制丙烯反应催化性能
Catalytic performances of Al-ITQ-13 zeolites with different SiO2/Al2 O3 ratios in the conversion of methanol to propene
摘要
Abstract
Al-ITQ-13 zeolites with different SiO2/Al2 O3 molar ratios were synthesized by using seeds in the gel and characterized by XRD, SEM, N2 physisorption, MAS NMR and NH3-TPD. The effect of SiO2/Al2 O3 molar ratio on the catalytic performance of Al-ITQ-13 in the conversion of methanol to propene ( MTP ) was investigated in a fixed-bed micro-reactor. The results showed that the Al-ITQ-13 zeolites with different SiO2/Al2 O3 molar ratios are similar in their textural properties;however, the amount and strength of acid sites decrease with the increase of SiO2/Al2 O3 molar ratio. Moreover, the SiO2/Al2 O3 molar ratio has a significant influence on the catalytic behavior of Al-ITQ-13 in MTP. As the hydrogen transfer and aromatization reactions were suppressed over the Al-ITQ-13 zeolite with high SiO2/Al2 O3 molar ratio, with the increase of SiO2/Al2 O3 molar ratio, the selectivity to propene and butene is increased at the expense of the selectivity to propene;that is, with the increase of SiO2/Al2 O3 molar ratio from 137 to 309, the selectivity to propene is increased from 46. 04% to 55. 52% and meanwhile, the propene/ethene ratio is increased from 3. 39 to 6. 57.关键词
MTP/Al-ITQ-13分子筛/甲醇/丙烯/硅铝物质的量比/酸性Key words
methanol to propene ( MTP)/Al-ITQ-13 zeolite/methanol/propene/SiO2/Al2 O3 molar ratio/acidity分类
化学化工引用本文复制引用
曾鹏晖,张莉莉,郭小忠,李明富,郭巧霞,牛超,申宝剑..不同硅铝比Al-ITQ-13分子筛的甲醇制丙烯反应催化性能[J].燃料化学学报,2017,45(11):1349-1355,7.基金项目
The project was supported by the National Natural Science Foundation of China ( U1462202 ) , the Science Foundation of China University of Petroleum-Beijing (2462015YQ0309).国家自然科学基金(U1462202)和中国石油大学(北京)科研基金(2462015YQ0309)资助 （ U1462202 ）
