可循环生产的直接电合成固态K_2FeO_4新方法  

Investigation of the New Method of Available Cycle-production for Direct Electrosynthesis of Solid K_2FeO_4

作　　者：何伟春[1] 何方[1] 关春龙[1] 毕豫[1] 

机构地区：[1]河南工业大学材料科学与工程学院,郑州450007

出　　处：《河南大学学报（自然科学版）》2008年第6期580-584,共5页Journal of Henan University:Natural Science

基　　金：河南省教育厅自然科学基金项目(2008B430005);河南工业大学博士科研基金项目(2007BS045)

摘　　要：对可循环生产的以KOH溶液电解铁丝网电极直接合成固态K2FeO4的新方法进行了研究，并用EDX，FTIR，XRD，SEM等技术对样品进行了表征．结果表明，在65℃14．5mol／L KOH中以4．2～1．0mA／cm^2电流密度电解时，可获得K2FeO4电流效率为51．2％～73．2％，纯度为94．8％～98．1％，相应的能耗为3．2～2．1kwh·（kgK2FeO4）^-1．连续循环电解实验表明，该工艺操作简单，几乎不产生废碱液，在上述实验条件下铁网阳极没有发现钝化，每次所得电解效果基本一致．An investigation of the new method of available cycle-production for direct electrosynthesis of solid K2 FeO4 is conducted by electrolyzing an iron wire gauze in KOH solution. The techniques of EDX, FTIR, XRD and SEM are used to characterize the obtained sample. The results show that the potassium ferrate（VI） efficencies of 51.2%-73.2%, purities of 94.8%-98.1% and power consumptions of 3.2-2.1 kWh/ kg （K2FeO4）can be obtained via electrolyzing in 14.5 mol/l. KOH at current densities of 4.2-1.0 mA/cm^2 at 65℃ . The continuous experiments show that the operation is simple, there is almost no waste alkaline solution produced and the iron wire gauze anode is not found to be passivated under the above conditions. All electrolysis results obtained each time are consistent.

关 键 词：高铁酸钾 电合成 循环生产 KOH 电流效率 

分 类 号：O646[理学—物理化学]