载体改性对Ni/La_(2)O_(2)CO_(3)催化乙醇水蒸气重整制氢的影响  

Effect of Carrier Modification on Reforming to Produce Hydrogen of Ethanol Steam Catalyzed by Ni/La_(2)O_(2)CO_(3)

作　　者：李亮荣 孙戊辰 陈祖杰 齐海霞 LI Liang-rong;SUN Wu-chen;CHEN Zu-jie;QI Hai-xia(Fuzhou Medical College of Nanchang University,Fuzhou 344000,China;Medical College,Nanchang University,Nanchang 330031,China;College of Chemistry,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学抚州医学院,江西抚州344000 [2]南昌大学医学院,江西南昌330031 [3]南昌大学化学学院,江西南昌330031

出　　处：《稀有金属与硬质合金》2021年第4期50-54,共5页Rare Metals and Cemented Carbides

基　　金：江西省教育厅科技项目(GJJ190109);国家自然科学基金(51263014);南昌大学抚州医学院重点项目(CDFY-KJ1403);。

摘　　要：分别用Zn和Ca改性复合La_(2)O_(2)CO_(3)载体并负载Ni,制备Ni/La_(2)O_(2)CO_(3)(NL)、Ni/La_(2)O_(2)CO_(3)-ZnO(NLZ)和Ni/La_(2)O_(2)CO_(3)-CaO(NLC)催化剂,催化乙醇水蒸气重整制氢,并通过XRD、BET和程序升温还原(TPR)等技术对催化剂晶相、比表面积和综合性能进行分析。结果表明,在300℃下NLC、NLZ的乙醇转化率较NL分别提高了24.3%和20.8%,其中NLC的低温催化活性最好。NLC、NLZ的H_(2)选择性均高于NL,在600℃下分别提高15.23%和14.04%;在400~700℃区间内,NLC的H2选择性高于NLZ,而CO_(2)、CO和CH_(4)的选择性低于NLZ。NLC能较好地抑制Ni高温聚结失活,从而提高Ni催化制氢的效果。Zn and Ca were respectively used to modify and compound La_(2)O_(2)CO_(3) carrier,and then the catalysts of Ni/La_(2)O_(2)CO_(3)(NL),Ni/La_(2)O_(2)CO_(3)-ZnO(NLZ)and Ni/La_(2)O_(2)CO_(3)-CaO(NLC)were prepared to catalyze reforming of ethanol steam to produce hydrogen.The crystal phase,specific surface area and comprehensive performance of the catalysts were analyzed by XRD,BET and temperature programmed reduction(TPR).The results show that compared with NL,the ethanol conversion rates of NLC and NLZ at 300℃are increased by 24.3%and 20.8%,respectively.NLC has the best low-temperature catalytic activity.The H_(2) selectivity of NLC and NLZ is higher than that of NL,increased by 15.23%and 14.04%respectively at 600℃.In the range of 400~700℃,the H_(2) selectivity of NLC is higher than that of NLZ,while the selectivity of CO_(2),CO and CH_(4) is lower than that of NLZ.NLC can better inhibit Ni coalescence and deactivation at high temperature,thus improving the efficiency of Ni catalysis for hydrogen production.

关 键 词：NI催化剂 La_(2)O_(2)CO_(3)载体 改性复合 乙醇水蒸气 制氢 ZnO CaO 

分 类 号：TQ426.65[化学工程]