酸碱改性HZSM-5分子筛上甲醇制取均四甲苯的研究

肖何; 高俊华; 胡津仙; 章斌; 刘平; 张侃

酸碱改性HZSM-5分子筛上甲醇制取均四甲苯的研究

肖何^1,2,
高俊华¹,
胡津仙^1,,
章斌¹,
刘平¹,
张侃¹

1.
中国科学院山西煤炭化学研究所煤转化国家重点实验室, 山西太原 030001;
2.
中国科学院大学, 北京 100049

详细信息

通讯作者:
胡津仙,Tel:0351-4250105,E-mail:hujx@sxicc.ac.cn。

中图分类号: O643
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- 文章访问数: 1958
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- 被引次数: 0
出版历程
- 收稿日期: 2012-07-17
- 修回日期: 2012-09-21
- 刊出日期: 2013-01-31

Synthesis of durene from methanol over alkali and acid modified HZSM-5

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 对HZSM-5分子筛进行"酸碱两步改性",制备得到了H(0.2)-Na-ZSM-5、H(0.5)-Na-ZSM-5、H(0.2)-K-ZSM-5和H(0.5)-K-ZSM-5四种催化剂。通过XRD、NH₃-TPD、ICP、FT-IR与Py-IR方法对催化剂进行表征,并在连续流动固定床反应装置上对催化剂进行评价。实验结果表明,H(0.2)-K-ZSM-5催化剂由于其孔径变大、弱的B酸量增多,从而提高了均四甲苯的选择性。
- HZSM-5 /
- 甲醇 /
- 均四甲苯 /
- 碱处理 /
- 酸处理
Abstract: Alkali and acid modified HZSM-5 molecular sieves were prepared through treating with different alkali solutions together with nitric acid of different concentrations; four catalysts, i.e. H(0.2)-Na-ZSM-5, H(0.5)-Na-ZSM-5, H(0.2)-K-ZSM-5 and H(0.5)-K-ZSM-5 were obtained. These catalysts were characterized by means of XRD, NH₃-TPD, ICP, FT-IR and Py-IR; their performance in the synthesis of durene from methanol was investigated in a fixed-bed down-flow reactor. The results showed that the highest selectivity to durene for methanol aromatization is achieved over the H(0.2)-K-ZSM-5 catalyst, which should be ascribed to its large pore size and abundant weak B acid sites arising from the alkali and acid modification.
- HZSM-5 /
- methanol /
- durene /
- alkaline treatment /
- acid treatment

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