甲烷部分氧化制合成气载体及助剂对Ni系催化剂活性的影响

第22卷第4期催化学报2001年7月Vol. 22 NO. 4Chinese Journal of CatalysisJuly 2001文章编号:0253-983X2001)403830甲烷部分氧化制合成气载体及助剂对Ni系催化剂活性的影响余林,袁书华2,田久英2,王升2,储伟(1汕头大学化学系,汕头515063;2四川大学化学学院,成都610064:3中国科学院成都有机化学研究所,成都610041)摘要:采用浸渍法制备了Ni系催化剂并用程序升温还原和X射线衍射技术对催化剂进行了表征用固定床微反装置考察了催化剂的催化活性.活性考察结果表明在Ni担载量为8%的N/y-A2ONV/-A2O3N/B-A2O3和κ/α-AO3四种催化剂上甲烷部分氧化制合成气反应的活性及产物选择性存在着明显的差异.在770℃下甲烷转化率及CO和H的选择性按Ni/yAl2O31.0%才能使催化剂的活性Zh, Xu h y et al. Chin/ Catal ), 2000,21(5): 415有明显提高8季亚英,李文钊,徐恒泳等.催化学报(JiYY,LiW参考文献Zh, Xuhyet al. Chin j Catal), 2000,21(6): 603曹立新,陈燕馨,李文钊.分子催伥( Cao L x, Chen y1严前古,高利珍,储伟等.化学学报( Yan Q G,GaoLX, Li W Zh. J Mol Catal( China )) 1994, 85): 375Zh, Chu W et al. Acta Chim Sin ) 1998, 56( 10): 102110 Jacono M L, Schiavello M, Cimino A.J Phys Chem2 ZhouJP, Li ch y, Zhang Zh B, Shen sh K.催化学报1971,78):1044( Chin catal),1999,204):39111褚衍来,李树本,林景治等.分子催 Chuy l,LiSh3任杰,陈仰光,吴东,范文浩.分子催做RenJ,ChenB, Lin j Zh et al. J Mol Catal( China )) 1996,10G, Wu D, Fan W H. J Mol Catal( China )) 1994, 8(6):449(3):1814 Zhang yh, Xiong GⅩ, Liu sh l et al.催化学撇(Mm/12储伟,刘晰,于作龙等.天然气化工(ChuW,LiuxYu ZL et al. Natur Gas Chem Ind),1998, 233): 29Catal),1999,20(4):3933 Wang Sh B, Lu G Q. Appl Catal B, 1998, 19( 3/4):5 Gadalla A M, Bower B. Chem Eng Sci,1998, 43(11)26714 Slagtern A, Olsbye U, Blom R et al. Stud Surf Sci6张兆彬,余长春,沈师孔.催化学报 Zhang Zh B,YuChCatal,1977,107:497Ch, Shen Sh K. Chin J Catal ) 2000, 21(1): 1415 Ji M, Zhou MJ, Bi Y L et al. J Mol Catal( China7季亚英,李文钊,徐恒泳等.催化学报(JiYY,LiW1997,1(1):13Partial Oxidation of Methane to SyngasEffects of Support and Promoter on Catalytic Performance of Ni/Al2O3 CatalystYU Lin'*, YUAN Shuhua, TIAN Jiuying, WANG Sheng, CHU Wei(1 Departent of Chemistry, Shantou University, Shantou 515063, china2 College of Chemistry Sichuan University, Chengdu 610064, china3 Chengdu Institute of Organic Chemistry, The Chinese Academy of Sciences Chengdu 610041, ChinaAbstract: The Ni catalyst samples, with y,a-,0-,or a-Al2O3 as a support and with Ceo as a promoterwere charaterized by TPR and XRD techniques and evaluated by the reaction of partial oxidation of methaneto syngas. The evaluation results showed that the catalytic activity of the catalyst samples and the productselectivity increase in the order of 8%Ni/y-AlO3 <8%Ni/8-Al2O3<8%Ni/0-Al2O38%Ni/a-Al,OWhen adding Ceo promoter into the catalyst samples the catalytic activity of 8%Ni/y-AlO3 and 8% Ni/8-Al2O, increased significantly while that of 8% Ni/0-Al2O3 and 8%Ni/a-Al2O3 had hardly changed. Thiscan be due to the depression of the formation of the low active crystalline phase Nial O4 when adding Ceo2promoter into 8%Ni/y-AlO3 and 8%Ni/8-ALO3 samples. The characterization results from TPR and XRDconfirmed the above viewpoint. For 8% Ni/B-Al2O3 and 8% Ni/a-AlO3 with low BET surface area,nocrystalline phase NialO4 was detecteey ords: nickel alumina supported catalyst methane partial oxidation syngas ceria, promoter(Ed WGzh中国煤化工CNMHG