氨分解制氢镍基催化剂的制备和应用  

Preparation and Application of Nickel-Based Catalyst for Ammonia Decomposition to Hydrogen

作　　者：蒋红华 王亚运[2,3] 王帅 阮建成[2] JIANG Honghua;WANG Yayun;WANG Shuai;RUAN Jiancheng(Hangzhou Xinde Environmental Protection Technology Co.Ltd,Jiande Zhejiang 311604;College of Chemical and Biological Engineering,Zhejiang University,Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology,Hangzhou 310027,China;Air Liquide(Hangzhou)LTD.,CO.,Hangzhou 310027)

机构地区：[1]杭州新德环保科技有限公司,浙江建德311604 [2]浙江大学化学工程与生物工程学院,浙江省化工高效制造技术重点实验室,杭州310027 [3]液化空气(杭州)有限公司,杭州310027

出　　处：《化工生产与技术》2020年第1期5-7,22,I0002,共5页Chemical Production and Technology

摘　　要：通过浸渍法制备出催化氨分解制备氢气的镧金属修饰的镍基催化剂Nix/Lay-Al2O3(x和y分别为镍和镧在催化剂中的质量分数),研究了优化活化工艺条件以及不同负载量的催化剂的催化活性。结果表明,当反应体系的温度在在400℃及以上时,Ni10/La5-Al2O3已达到很好的催化效果;在450℃及以上时,Ni10/La1-Al2O3即可以满足转化率高的需求。随着氨气空速的增加,氨气转化率有所降低,但是反应速率获得增加,因此实际应用上应充分考虑到不同因素的影响。The nickel-based catalyst supported by the alumina which was modified by lanthanum was prepared with the impregnation method,and then the optimal activating conditions were found out.The catalytic activities of the nickel-based catalysts with different amounts of supported metal had been analyzed and the results showed that the Ni10/La5-Al2O3 could be used to get a high NH3 conversion when the reaction temperature was above 400℃and the Ni10/La1-Al2O3 could also work very well when the temperature was above 450℃.In addition,the influence of NH3 space velocity on the reaction system had been analyzed.With the space velocities elevating,the NH3 conversions decreased a little while the reaction rate increased.Hence,these factors should be taken into full considerations when this kind of catalyst was employed in industry.

关 键 词：Nix/Lay-Al2O3催化剂 浸渍法 氨分解 制氢 

分 类 号：TQ116.29[化学工程—无机化工]