稀土改性CaO载体负载Ni催化乙醇水蒸气重整制氢  

Hydrogen Production by Ethanol Steam Reforming Catalyzed with Ni Supported by Rare Earth Modified CaO Carrier

作　　者：李亮荣 杨小喆 江文丹 张亮东 杨青青 章志红 LI Liang-rong;YANG Xiao-zhe;JIANG WEN-dan;ZHANG Liang-dong;YANG Qing-qing;ZHANG Zhi-hong(Fuzhou Medical College,Nanchang University,Fuzhou 344000,China;School of Public Health,Nanchang University,Nanchang 330031,China;Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health,Nanchang 330031,China)

机构地区：[1]南昌大学抚州医学院,江西抚州344000 [2]南昌大学公共卫生学院,江西南昌330031 [3]疾病预防与公共卫生江西省重点实验室,江西南昌330031

出　　处：《稀有金属与硬质合金》2024年第5期50-54,共5页Rare Metals and Cemented Carbides

基　　金：江西省教育厅科技项目(GJJ2203405);抚州市科技指导项目(20220906);南昌大学抚州医学院重点科技项目(FYKJ-202203)。

摘　　要：将稀土化合物La_(2)O_(2)CO_(3)改性CaO载体负载Ni制备Ni/CaO-La_(2)O_(2)CO_(3)(NCaL)催化剂,对其催化乙醇水蒸气重整制氢效果进行了研究,并与未改性的Ni/CaO(NCa)催化剂进行对比。采用X射线衍射仪(XRD)分析催化剂的物相,程序升温化学吸附仪(TPR)测试氧化还原能力,色谱工作站分析制氢性能。结果显示:300℃下,NCa的乙醇转化率不到70%,而NCaL的乙醇转化率超过80%;400℃下,NCaL的乙醇转化率已达100%,而NCa的乙醇转化率不到95%。La_(2)O_(2)CO_(3)改性能显著提高催化剂的低温乙醇转化率和催化活性。600℃下,NCaL的H_(2)选择性达到最大值近90%,较NCa的最大值提高了14.31%。NCaL的H_(2)、CO_(2)选择性明显高于NCa,而CO、CH4选择性有所降低。La_(2)O_(2)CO_(3)改性能显著提高催化剂的H_(2)选择性,稀土改性CaO载体可提升Ni催化乙醇水蒸气重整制氢效果。Ni/CaO-La_(2)O_(2)CO_(3)(NCaL)catalyst was prepared by supporting Ni with CaO carrier modified by rare earth compound La_(2)O_(2)CO_(3).Its catalytic effect for hydrogen production by ethanol steam reforming was studied,compared with the unmodified Ni/CaO(NCa)catalyst.The phase of the catalyst was analyzed by X-ray diffractometer(XRD),the redox capacity was tested by temperature programmed chemisorption instrument(TPR),and the hydrogen production performance was analyzed by chromatography worksta-tion.The results show that the ethanol conversion rate at 300℃of NCa is less than 70%,while that of NCaL is more than 80%.The ethanol conversion rate at 400℃of NCaL reaches 100%,while that of NCa is less than 95%.The La_(2)O_(2)CO_(3) modification can significantly improve the ethanol conversion rate and ca-talytic activity at low temperature of the catalyst.At 600℃,the H_(2) selectivity of NCaL reaches the maxi-mum value of nearly 90%,which is 14.31%higher than the maximum H_(2) selectivity of NCa.The selectivi-ty of H_(2) and CO_(2) of NCaL is higher than that of NCa,while its selectivity of CO and CH4 is decreased.The La_(2)O_(2)CO_(3) modification can significantly improve the H_(2) selectivity of the catalyst,and CaO carrier modified by rare earth can improve the hydrogen production effect of ethanol steam reforming catalyzed by Ni.

关 键 词：NI催化剂 CaO载体 稀土改性 La_(2)O_(2)CO_(3) 乙醇水蒸气重整 制氢 乙醇转化率 产物选择性 

分 类 号：TQ426.64[化学工程]