Base-catalysed reduction of pyruvic acid in near-critical water

被引：0
作者：
Li Gang Luo
Zhi Qiang Hou
Yuan Yuan Wang
Li Yi Dai
机构：
[1] East China Normal University,Department of Chemistry
来源：
Chemical Papers | 2013年 / 67卷
关键词：
near-critical water; additives; pyruvic acid; reduction; lactic acid;
D O I：
暂无
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学科分类号：
摘要：
The reduction of pyruvic acid in near-critical water has successfully been conducted under conditions of various temperatures, pressures, reaction time and the presence of formic acid as the reducing agent. In this work, additives (K2CO3, KHCO3, and sodium acetate) used in the reduction of pyruvic acid were also investigated. The results showed that by adding K2CO3 (25 mole %) a markedly higher lactic acid yield (70.7 %) was obtained than without additives (31.3 %) at 573.15 K, pressure of 8.59 MPa, 60 min, and in the presence of 2 mol L−1 formic acid. As a base catalyst, K2CO3 definitely accelerated the reduction of pyruvic acid. The reaction rate constants, average apparent activation energy and pre-exponential factor were evaluated in accordance with the Arrhenius equation. The reaction mechanism of the reduction was proposed on the basis of the experimental results.
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页码：509 / 516
页数：7
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