添加剂对车载制氢机制氢效率影响的实验研究  

Effect of Additive on Performance of On-board Hydrogen Generator with Different Mass Fractions of KOH Liquor

作　　者：纪常伟[1,2] 冯雨[1] 汪硕峰[1,2] 张擘[1] 徐溥言 余梦辉 

机构地区：[1]北京工业大学环境与能源工程学院区域大气复合污染防治北京市重点实验室,北京100124 [2]北京电动车辆协同创新中心,北京100081

出　　处：《兵工学报》2016年第3期570-576,共7页Acta Armamentarii

基　　金：国家自然科学基金项目(51476002);国家重点基础研究发展计划项目(2013CB228403);北京市科学技术委员会科技计划项目(Z141100003814017)

摘　　要：针对掺氢汽油机汽车使用的车载制氢机效率偏低问题,在制氢机性能实验台上研究加入添加剂对制氢机效率的影响。在电解电流为40 A,初始温度为23.7℃,初始压力为0.1 MPa条件下,对电解质量分数分别为20%、30%和40%的KOH溶液与其对应单位体积中含有0.3 g重铬酸钾KOH溶液的电解电压与制氢效率进行比较。实验结果表明:在质量分数分别为20%、30%和40%KOH溶液中加入重铬酸钾电解电压分别降低0.16 V、0.19 V和0.09 V,制氢效率分别提高2.14%、2.78%和1.46%,制氢效率比分别提高5.23%、6.71%和3.47%;在质量分数为30%KOH溶液中加入重铬酸钾效果最好,可以有效提高制氢效率。In view of the low efficiency of on-board hydrogen generator used in the vehicle with hydrogenblended gasoline engine,the effect of additive on the performance of on-board hydrogen generator with different mass fractions of KOH liquor is tested on a hydrogen generator testing bench. The experiment is carried out under the conditions of electrolytic current of 40 A,initial temperature of 23. 7 ℃ and initial pressure of 0. 1 MPa. The mass fractions of KOH are kept at 20%,30% and 40% in the KOH liquor.For each KOH mass fraction,the effect of addition of 0. 3 g K_2Cr_2O_7 on the electrolytic voltage and hydrogen production efficiency is investigated. The experimental results indicate that,when 20%,30% and40% KOH liquors are added into K_2Cr_2O_7,respectively,the electrolytic voltages are reduced by0. 16 V,0. 19 V and 0. 09 V,the hydrogen efficiencies are increased by 2. 14%,2. 78% and 1. 46%,respectively,and the hydrogen efficiency ratios are increased by 5. 23%,6. 71% and 3. 47%. The hydrogen production efficiency is effectively increased by adding 30% KOH liquor into K_2Cr_2O_7.

关 键 词：动力机械工程 车载制氢机 氢氧化钾 添加剂 制氢效率 重铬酸钾 

分 类 号：TK91[动力工程及工程热物理]