助剂改性Ni/钙钛矿催化焦油重整产氢研究  

H_(2) Production from Toluene Steam Reforming Over Ni/Perovskite Catalysts With Presence of Promoters

作　　者：张中晖 邓涛[1] 何东霖 秦昌雷[1] 夏洪强 冉景煜[1] ZHANG Zhonghui;DENG Tao;HE Donglin;QIN Changlei;XIA Hongqiang;RAN Jingyu(Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education,School of Energy and Power Engineering,Chongqing University,Chongqing 100080,China;Engineering Research Centre for Waste Oil Recovery Technology and Equipment of Ministry of Education,Chongqing Technology and Business University,Chongqing 400067,China;State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]重庆大学能源与动力工程学院,重庆400044 [2]重庆工商大学焦油回收技术与设备工程研究中心,重庆400044 [3]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,银川750021

出　　处：《工程热物理学报》2023年第4期863-870,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.52076020);省部共建煤炭高效利用与绿色化工国家重点实验室开放课题(No.2021-K12)。

摘　　要：为构建高活性且长效稳定的焦油重整催化剂体系,本研究对助剂改性Ni/钙钛矿催化剂的反应特性进行了实验测试与综合评价。分别在不同温度(600℃、650℃、700℃)和负载量(ω=0.5%、1%、2%、4%)下开展了甲苯水蒸气催化重整实验,并利用TEM、XRD、TPR、XPS等技术分析了催化剂反应前后形貌、物相等物化特征的变化情况。结果表明,质量分数为2%的Ce助剂掺杂可以在标准化学计量比下获得最高的甲苯转化率与氢气产率,分别为84.7%和57.4%。这是由于Ce助剂添加增加了晶格氧含量,促进了焦炭前驱体气化并减少积碳,从而维持催化活性。Aiming to synthesize a kind of catalyst with high tar steam reforming reactivity,the effect of promoters modified Ni/Perovskite were experimentally tested and comprehensively evaluated.In this work,the catalytic performance was carried out by using toluene as biomass tar model at different temperatures(600℃,650℃,700℃)and various support quantities of promoters(w=0.5%,1%,2%,4%),and changes in morphology and phase of catalysts were characterized by TEM,XRD,TPR,XPS,etc.Experimental results indicated the maximum toluene conversion and hydrogen yield reached 84.7%and 57.4%respectively under standard stoichiometric ratio by using w=2% Ce as promoter.The reason is the presence of Ce promoter increased the content of lattice oxygen,which further enhanced the gasification of coke precursor and reduced the coke deposition,therefore maintained the catalytic activity.

关 键 词：焦油 Ni/钙钛矿催化剂 产氢 助剂 

分 类 号：TK91[动力工程及工程热物理]