ZSM-5-SBA-15复合分子筛制备及甲苯甲醇烷基化性能研究

刘鹏; 沈健

ZSM-5-SBA-15复合分子筛制备及甲苯甲醇烷基化性能研究

刘鹏,
沈健

辽宁石油化工大学石油化工学院, 辽宁抚顺 113001

详细信息

通讯作者:
沈健(1959-),男,硕士,辽宁沈阳人,教授,E-mail:Sj6673120@yahoo.com.cn。

中图分类号: TQ426.6
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- 文章访问数: 417
- HTML全文浏览量: 14
- PDF下载量: 422
- 被引次数: 0
出版历程
- 收稿日期: 2014-11-10
- 修回日期: 2015-01-13
- 刊出日期: 2015-09-30

Preparation of ZSM-5-SBA-15 composite molecular sieves and its performance for toluene alkylation with methanol

LIU Peng,
SHEN Jian

College of Petrochemical Engineering, Liaoning Shihua University, Fushun 113001, China

摘要

摘要: 采用后合成法制备了ZSM-5-SBA-15复合分子筛,通过XRD、FT-IR、BET、NH₃-TPD及吡啶红外等手段表征催化剂的性质。结果表明,ZSM-5-SBA-15既具有微孔结构又具有介孔结构。吡啶吸附和NH₃吸脱附实验结果表明,ZSM-5微孔分子筛的引入使SBA-15介孔分子筛的酸性增强,但与ZSM-5相比,ZSM-5-SBA-15复合分子筛的酸性位没有改变,酸强度有一定的减弱。用固定床评价了该复合分子筛甲苯甲醇烷基化反应的催化性能。结果表明,与常规ZSM-5相比,ZSM-5-SBA-15表现出了较高的对位选择性。
- ZSM-5-SBA-15 /
- ZSM-5 /
- SBA-15 /
- 对二甲苯 /
- 烷基化
Abstract: A series of ZSM-5-SBA-15 composite molecular sieves were prepared by post-synthesis method and characterized by XRD, FT-IR, BET, NH₃-TPD and pyridine infrared. The results indicated that ZSM-5-SBA-15 has both ZSM-5 microporous and SBA-15 mesoporous structure. The adsorption-desorption measurement using pyridine and ammonia demonstrated that acidity of SBA-15 was heightened because ZSM-5 was introduced into. Compared with ZSM-5, the acidic sites on ZSM-5-SBA-15 were still accessible. However, the strength of acidity was weakened. In the probe reaction of the alkylation of toluene and methanol, the ZSM-5-SBA-15 composite exhibited higher para-xylene selectivity in comparison to pristine ZSM-5.
- ZSM-5-SBA-15 /
- ZSM-5 /
- SBA-15 /
- para-xylene /
- alkylation

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