γ-Al_(2)O_(3)负载Ni-Fe催化剂的制备及其催化NH_(3)分解性能  

Preparation on Ni-Fe catalyst supported by γ-Al_(2)O_(3) and its catalytic performance in ammonia decomposition

作　　者：韩昕璐 戚诗涛 林日亿[1] 张立强[1] 王新伟[1] HAN Xinlu;QI Shitao;LIN Riyi;ZHANG Liqiang;WANG Xinwei(College of New Energy,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东青岛266580

出　　处：《中国石油大学学报(自然科学版)》2025年第2期247-255,共9页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(52206189)。

摘　　要：以Ni(NO_(3))_(2)·6H_(2)O、Fe(NO_(3))_(3)·9H_(2)O和γ-Al_(2)O_(3)为原料,采用浸渍法制备多种Ni-Fe氨分解催化剂,探究不同条件下氨定向催化分解制取氢气的效果,并采用单点比表面测试(BET)、扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、氢气程序升温还原(H_(2)-TPR)对催化剂的结构进行表征。结果表明:前驱体溶液质量分数为20%所对应的Ni-Fe/Al_(2)O_(3)催化剂的Ni的分散度最大并且催化活性最高;当NH_(3)+N_(2)混合器流速控制在40+200 mL/min且反应温度为600℃时,氨分解转化率为91.3%。Ammonia is an important hydrogen carrier,and its decomposition can release stored hydrogen energy.In order to meet the current industrial demands for high hydrogen production rates and cost-effective catalysts in the ammonia decomposition process,this study utilized Ni(NO_(3))_(2)·6H_(2)O,Fe(NO_(3))_(3)·9H_(2)O,and γ-Al_(2)O_(3)as raw materials to prepare various nickel-based catalysts for ammonia decomposition via impregnation method.The study investigated the effect of directed catalytic decomposition of ammonia for hydrogen production under different conditions,and characterized the catalysts structures using single-point BET,SEM,TEM,XRD,and H_(2)-TPR techniques.The results show that the Ni-Fe/Al_(2)O_(3)catalyst with the heating temperature of 500℃and the precursor solution concentration of 20%has the largest Ni dispersion and the highest catalytic activity.When the flow rate of NH_(3)+N_(2)mixer was controlled at 40+200 mL/min and the reaction temperature was 600℃,the ammonia conversion rate of the material was 91.3%.

关 键 词：镍催化剂 制氢 载体 氨分解 

分 类 号：TK02[动力工程及工程热物理]