CoB催化剂在硼氢化钠-乙醇体系中制氢的应用

发布时间：2018-06-06 21:00

本文选题：CoB催化剂 + 硼氢化钠　；参考：《应用化工》2017年11期

【摘要】：采用化学还原法制备了非晶态合金CoB催化剂,研究其在NaBH_4-乙醇复合体系中的催化活性。考察了基于乙醇量(硼氢化钠浓度)、NaOH质量浓度、反应体系温度、醇水体系对CoB催化NaBH_4制氢的影响。结果表明,硼氢化钠产氢速率随着乙醇量(硼氢化钠浓度)的增加呈现出先加快后减缓的变化;NaBH_4产氢速率随碱质量浓度的增加呈现出先增加后减小的变化,且最优碱浓度大约为5%;NaBH_4制氢速率随反应温度增加而快速增加,反应动力学计算显示该体系的表观反应活化能Ea为56.45 kJ/mol;在相同条件下,CoB催化硼氢化钠醇解制氢的产氢速率快于催化硼氢化钠水解制氢的产氢速率。
[Abstract]:Amorphous alloy CoB catalyst was prepared by chemical reduction method and its catalytic activity in NaBH4- ethanol composite system was studied. The effects of ethanol content (sodium borohydride concentration), reaction temperature and alcohol-water system on the production of NaBH _ 4 catalyzed by CoB were investigated. The results showed that the hydrogen production rate of sodium borohydride increased first and then slowed down with the increase of ethanol concentration. The hydrogen production rate of NaBH4 increased first and then decreased with the increase of alkali concentration. The optimum alkali concentration is about 5% NaBH4. The hydrogen production rate increases rapidly with the increase of reaction temperature. The kinetic calculation of the reaction showed that the apparent activation energy (EA) of the system was 56.45 kJ / mol, and the rate of hydrogen production was faster than that of catalytic hydrolysis of sodium borohydride under the same conditions.
【作者单位】：辽宁石油化工大学化学化工与环境学部石油化工重点实验室;
【基金】：国家自然科学基金项目(21201096) 辽宁省教育厅资助项目(L2010242) 辽宁省石油化工重点实验室项目(LZ2015050) 中国科学院煤制乙二醇及相关技术重点实验室资助项目
【分类号】：O643.36;TQ116.2

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