Study on Effect and Catalytic Mechanism of the Catalysts for Coal Oxidation in Alkaline Medium

Study on Effect and Catalytic Mechanism of the Catalysts for Coal Oxidation in Alkaline Medium

刘怀有;吕经康;赵永刚;周尉;印仁和

【期刊名称】《中国化学（英文版）》 【年(卷),期】2011(029)010

【摘要】Coal electro-oxidation in sodium hydroxide solution with catalysts, K3Fe（CN）6, sodium hypochlorite and sup- ported FeS, were investigated, respectively. Gas produced from electro-analysis of coal slurry was collected by drainage-method and l-t curves were recorded to testify the catalysis of each catalyst for coal oxidation. The results show that the three kinds of catalysts can obviously improve the coal oxidation current. Furthermore, K3Fe（CN）6 and sodium hypochlorite played an indirect oxidation role in the electrolysis process. Catalysts bridge the coal par- ticles and the solid electrode surface, thus increase the coal oxidation rates. The changes of catalyst content during the electrolysis were further determined by quantitative titration to discuss the catalytic Mechanism. The dynamic transition of K3Fe（CN）6/K4Fe（CN）6 and ClO^-/Cl^- are proposed by iodometric method. 【总页数】5页(2014-2018)

【关键词】催化机理;氧化效应;催化剂;中煤;碱性介质;K4Fe（CN）6;氢氧化钠溶液;铁氰化钾

【作者】刘怀有;吕经康;赵永刚;周尉;印仁和