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首页> 外文期刊>Catalysis science & technology >Adsorption and reaction properties of SnBEA, ZrBEA and H-BEA for the formation of p-xylene from DMF and ethylene
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Adsorption and reaction properties of SnBEA, ZrBEA and H-BEA for the formation of p-xylene from DMF and ethylene

机译：ZrBEA SnBEA的吸附和反应特性从DMF和H-BEA对二甲苯的形成和乙烯

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摘要

The adsorption and reaction properties of H-BEA, SnBEA, ZrBEA and siliceous BEA were examined to understand the reaction of 2,5-dimethylfuran (DMF) with ethylene to form p-xylene. Temperature-programmed desorption (TPD) of diethyl ether, DMF, 2,5-hexanedione and p-xylene on each of the zeo-lites demonstrated that the Bronsted sites in H-BEA are more reactive than the Lewis sites in SnBEA and ZrBEA and tend to promote the oligomerization of DMF and 2,5-hexanedione, even at 295 K; however, the adsorbed 2,5-hexanedione is converted to DMF at both Lewis-and Bronsted-acid sites. H-BEA, SnBEA and ZrBEA all catalyzed the reaction to p-xylene with high selectivity in a continuous-flow reactor, with all three catalysts showing rates that were first order in both DMF and ethylene. H-BEA was found to deactivate rapidly due to coking, while ZrBEA and SnBEA were both stable. The implications of these results for practical applications are discussed.
机译：H-BEA的吸附和反应特性,SnBEA ZrBEA和硅质BEA检查理解的反应2,5 -二甲基呋喃(DMF)与乙烯形成对二甲苯。程序升温解吸(兼总经理)乙醚、DMF、2,5-hexanedione和对二甲苯在每个zeo-lites证明的布仑斯惕网站H-BEA更被动路易斯在SnBEA ZrBEA和网站促进DMF的寡聚化2、5-hexanedione甚至在295 K;吸附2,5-hexanedione转化为DMF两个路易斯和布仑斯惕酸网站。和ZrBEA对二甲苯的催化反应高选择性的连续流反应堆,所有三个催化剂显示率一阶DMF和乙烯。H-BEA迅速关闭由于被发现炼焦,ZrBEA和SnBEA都是稳定的。这些结果为实际的意义应用进行了讨论。

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