中文摘要：

研究了在氧气存在下生物质催化氧化制甲酸体系中甲酸的稳定性,主要考察了反应温度、反应时间、氧气初始压力、硫酸浓度、催化剂等因素对于甲酸分解的影响。研究结果表明,温度、反应时间、硫酸浓度对甲酸的分解速率有显著的影响;氧气的初始压力对于甲酸的分解影响较小;催化剂NaVO3的存在会加速甲酸的分解。生物质催化氧化体系中,甲酸的分解反应为二级反应,甲酸分解反应的表观活化能为85.1 k J/mol。提出了在H2SO4溶液中氧气气氛下NaVO3催化甲酸分解的机理。

英文摘要：

The stability of formic acid in NaVO3＋ H2SO4 aqueous solutions under high-pressure oxygen has been studied,since this is relevant to the conversion of biomass to formic acid. The effects of varying the temperature,reaction time,initial oxygen pressure,sulfuric acid concentration and catalyst presence on the decomposition rate of formic acid were studied in detail. The results indicate that the decomposition rate of formic acid depends greatly on temperature,reaction time and sulfuric acid concentration. The initial oxygen pressure has a small influence on the decomposition rate of formic acid. The presence of a catalyst can significantly improve the decomposition rate of formic acid. A kinetic study indicates that the decomposition of formic acid in NaVO3＋ H2SO4 aqueous solution under high-pressure oxygen is a second-order reaction,and the apparent activation energy for the decomposition of formic acid is 85. 1 k J/ mol. A mechanism of NaVO3 catalysis of formic acid decomposition has been proposed.