Structures of H3PO4/SiO2 catalysts and catalytic performance in the hydration of ethene

被引：30

作者：

Maki, Y ^{[1
]}

Sato, K ^{[1
]}

Isobe, A ^{[1
]}

Iwasa, N ^{[1
]}

Fujita, S ^{[1
]}

Shimokawabe, M ^{[1
]}

Takezawa, N ^{[1
]}

机构：

[1] Hokkaido Univ, Dept Mat Sci & Technol, Sapporo, Hokkaido 060, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 1998年 / 170卷 / 02期

关键词：

hydration of ethene; ethanol; H3PO4/SiO2; silicon phosphates;

D O I：

10.1016/S0926-860X(98)00054-4

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：

The hydration of ethene was carried out over H3PO4/SiO2 having various amounts of H3PO4. The rate of the ethanol formation increased markedly with the increasing H3PO4 loadings, in particular above 60-70 wt%. By X-ray diffraction (XRD), and P-31 and Si-29 MAS NMR methods, it was revealed that various silicon phosphates were produced in the preparation of the catalysts. The structures of the phosphates depended on the H3PO4 loadings. It was suggested that Si(HPO4)(2) . H2O species which formed at higher H3PO4 loadings were hydrolyzed to H3PO4 and SiO2 during the course of the reaction, yielding the catalysts with high performance. The bulk phase of the H3PO4 was involved in the reaction. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：269 / 275

页数：7

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