首页|稀土改性CaO载体负载Ni催化乙醇水蒸气重整制氢

稀土改性CaO载体负载Ni催化乙醇水蒸气重整制氢

扫码查看
原文链接
  • 万方数据
  • 维普
将稀土化合物La2O2CO3 改性CaO载体负载Ni制备Ni/CaO-La2O2CO3(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%.La2O2CO3 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H2 选择性达到最大值近90%,较NCa的最大值提高了14.31%.NCaL的H2、CO2 选择性明显高于NCa,而CO、CH4 选择性有所降低.La2O2CO3 改性能显著提高催化剂的H2 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.
Hydrogen Production by Ethanol Steam Reforming Catalyzed with Ni Supported by Rare Earth Modified CaO Carrier
Ni/CaO-La2O2CO3(NCaL)catalyst was prepared by supporting Ni with CaO carrier modified by rare earth compound La2O2CO3.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 La2O2CO3 modification can significantly improve the ethanol conversion rate and ca-talytic activity at low temperature of the catalyst.At 600℃ ,the H2 selectivity of NCaL reaches the maxi-mum value of nearly 90%,which is 14.31%higher than the maximum H2 selectivity of NCa.The selectivi-ty of H2 and CO2 of NCaL is higher than that of NCa,while its selectivity of CO and CH4 is decreased.The La2O2CO3 modification can significantly improve the H2 selectivity of the catalyst,and CaO carrier modi-fied by rare earth can improve the hydrogen production effect of ethanol steam reforming catalyzed by Ni.

Ni catalystCaO carrierrare earth modificationLa2O2CO3ethanol steam reforminghydrogen productionethanol conversion rateproduct selectivity

李亮荣、杨小喆、江文丹、张亮东、杨青青、章志红

展开 >

南昌大学 抚州医学院,江西 抚州 344000

南昌大学 公共卫生学院,江西 南昌 330031

疾病预防与公共卫生江西省重点实验室,江西 南昌 330031

Ni催化剂 CaO载体 稀土改性 La2O2CO3 乙醇水蒸气重整 制氢 乙醇转化率 产物选择性

江西省教育厅科技项目抚州市科技指导项目南昌大学抚州医学院重点科技项目

GJJ220340520220906FYKJ-202203

2024

10.19990/j.issn.1004-0536.2024.05.050.05

稀有金属与硬质合金
中国有色金属学会，长沙有色冶金设计研究院有限公司

稀有金属与硬质合金

北大核心
影响因子：0.32
ISSN：1004-0536
年,卷(期)：2024.52(5)