Nitridation: A simple way to improve the catalytic performance of hierarchical porous ZSM-5 in benzene alkylation with methanol

Nitridation: A simple way to improve the catalytic performance of hierarchical porous ZSM-5 in benzene alkylation with methanol
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氮化:提高多级孔ZSM-5在苯与甲醇烷基化反应中催化性能的简单方法

DOI:
10.1016/j.cclet.2016.10.025
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发表时间:
2017-02
影响因子:
9.1
通讯作者:
Li Xiao-Nian
Li Xiao-Nian
中科院分区:
化学1区
文献类型:
--
作者:
Lyu Jing-Hui;Hu Hua-Lei;Rui Jia-Yao;Zhang Qun-Feng;Cen Jie;Han Wen-Wen;Wang Qing-Tao;Chen Xiao-Kun;Pan Zhi-Yan;Li Xiao-Nian

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采用流动氨气对分级多孔ZSM-5进行高温氮化,合成了氮化分级多孔ZSM-5。采用XRD、SEM、N2吸附等温线、NH3-TPD和Py-IR等手段对样品进行了表征,并对样品在苯和甲醇烷基化反应中的性能进行了评价。结果表明,氮化反应保持了原ZSM-5分子筛的高比表面积,同时有效地调节了分子筛的布朗斯特酸性。此外,在氮化催化剂上观察到高的抑制率,这可以归因于布朗斯台德酸性的降低,其抑制了甲醇制烯烃反应。
Nitrided hierarchical porous ZSM-5 was synthesized by nitridation of hierarchical porous ZSM-5 with flowing ammonia at elevated temperature. The samples were characterized by XRD, SEM, Nitrogen sorption isotherms, NH3-TPD and Py-IR, and evaluated in alkylation of benzene and methanol. The result indicated that the high specific surface area of parent ZSM-5 was maintained, while the Brönsted acidity was effectively adjusted by nitridation. Moreover, the high suppression of ethylbenzene was observed on nitrided catalyst and this could be attributed to the decrease of Brönsted acidity which suppressed the methanol to olefins reactions.
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