Effect of water properties on selectivity for 1-octene and 2-octanol reaction systems in sub- and supercritical water using a TiO2 catalyst

被引：7

作者：

Akizuki, Makoto ^{[1
]}

Oshima, Yoshito ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Frontier Sci, Dept Environm Syst, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778563, Japan

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2017年 / 123卷

关键词：

Subcritical water; Supercritical water; Solid acid catalysis; Water properties; Reaction selectivity; TEMPERATURE; DERIVATIVES; FORMULATION; HYDRATION; DENSITY; ACID;

D O I：

10.1016/j.supflu.2016.11.018

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 effect of water properties on solid acid catalysis using TiO2 as the catalyst in sub- and supercritical water was elucidated using the reactions of 1-octene and 2-octanol as models. Kinetic data for these reactions at 290-410 degrees C and 25 MPa were analyzed, and relationships between reaction selectivities and water properties were evaluated quantitatively. The cis/trans selectivity for 2-octene produced in reactions of both 1-octene and 2-octanol drastically increased at around the critical temperature of water, and was quantitatively explained using the model of acid catalysis in sub- and supercritical water derived from kinetic analyses. The hydration selectivity of 1-octene conversion had a local maximum at around 330 degrees C, which was explained by considering the change in reactivity of water as a reactant caused by changes in both water density and the degree of hydrogen bonding. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：76 / 81

页数：6

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