Effects of added phosphorus on conversion of ethanol to propylene over ZSM-5 catalysts

被引：69
|
作者：
Takahashi, Atsushi [1 ]
Xia, Wei [1 ]
Nakamura, Isao [1 ]
Shimada, Hiromichi [1 ]
Fujitani, Tadahiro [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Res Inst Innovat Sustainable Chem, Tsukuba, Ibaraki 3058569, Japan
来源：
APPLIED CATALYSIS A-GENERAL | 2012年 / 423卷
关键词：
Ethanol; Propylene; P-ZSM-5; Carbon deposition; ZEOLITE CATALYSTS; TRANSFORMATION; CRACKING; PERFORMANCE; SITES; ACID; OIL;
D O I：
10.1016/j.apcata.2012.02.029
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We investigated the effects of added phosphorus on the conversion of ethanol to propylene over ZSM-5 zeolite catalysts. We found that the activity of the catalysts was enhanced by the addition of phosphorus, and we suggest that the added phosphorus suppressed oligomerization of propylene and butene by decreasing the acidity of the active sites of the zeolites. Furthermore, the addition of phosphorus greatly enhanced the hydrothermal stability of the zeolites and thus substantially improved the catalyst durability during ethanol conversion. Carbon deposition, which was the main cause of deactivation of the phosphorus-modified zeolites, was suppressed by H2O produced by dehydration of ethanol. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：162 / 167
页数：6
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