采用浸渍还原法以水合肼为还原剂制备Cu2O/MgO催化剂,以环己醇脱氢制环己酮为探针反应,考察了Ce、Sm的添加对Cu2O/MgO催化性能的影响;采用程序升温还原(TPR)、二氧化碳程序升温脱附(CO2-TPD)和X射线衍射(XRD)等手段对催化剂进行了表征.研究结果表明,Ce-Cu2O/MgO、 Sm-Cu2O/MgO的催化性能优于Cu2O/MgO.其原因是Ce、Sm的添加使Cu2O分散度变大,导致催化剂中活性组分与载体的相互作用力增强,Cu2O更稳定;同时增加了催化剂的弱、中碱中心强度并削弱了其强碱中心强度,从而有利于反应的进行.
参考文献
| [1] | Chang H F;Abu Saleque M .Dependence of selectivity on the preparation method of copper/α-alumina catalysts in the dehydrogenation of cyclohexanol[J].Applied Catalysis A:General,1993,103:233-242. |
| [2] | Fridman V.Z. .Dehydrogenation of Cyclohexanol on Copper-Containing Catalysts 1.The Influence of the Oxidation State of Copper on the Activity of Copper Sites[J].Journal of Catalysis,2000(1):20-30. |
| [3] | 张明慧,李伟,陶克毅,王忠秋,李晓惠,山力赤.环己醇脱氢新型催化剂的研究[J].石油化工,2000(12):903-906. |
| [4] | Nagaraja BM;Kumar VS;Shashikala V;Padmasri AH;Reddy SS;Raju BD;Rao KSR .Effect of method of preparation of copper - magnesium oxide catalyst on the dehydrogenation of cyclohexanol[J].Journal of molecular catalysis, A. Chemical,2004(1/2):339-345. |
| [5] | Minhua Cao;Changwen Hu;Yonghui Wang;Yihang Guo;Caixin Guo;Enbo Wang .A controllable synthetic route to Cu, Cu_2O, and CuO nanotubes and nanorods[J].Chemical communications,2003(15):1884-1885. |
| [6] | Wenzhong Wang;Guanghou Wang;Xiaoshu Wang;Yongjie Zhan;Yingkai Liu;Changlin Zheng .Synthesis and Characterization of Cu_2O Nanowires by a Novel Reduction Route[J].Advanced Materials,2002(1):67-69. |
| [7] | 石秋杰,刘宁,梁义.MgO负载Cu2O催化剂的制备及其催化环己醇脱氢[J].催化学报,2007(01):57-61. |
| [8] | Wu Qisheng;Yang Chunsheng;Chen Xi .Advancement of environmental purification material modified by rare earth metals[J].Journal of Rare Earths,2007,25(zement2):295-299. |
| [9] | 张建霞,何洪,戴洪兴,訾学红.CeO2掺杂的PdO纤维催化剂的甲烷催化燃烧活性研究[J].中国稀土学报,2006(z2):24-27. |
| [10] | 宋一兵,余林,孙长勇,叶飞,方奕文,林维明.稀土Ce对制合成气用Ce-Ni/Al2O3催化剂活性和稳定性的影响[J].催化学报,2002(03):267-270. |
| [11] | Wenhua Yao;Yongjuan Chen;Liang Min;Hua Fang;Zhiyin Yan;Honglin Wang;Jiaqiang Wang .Liquid oxidation of cyclohexane to cyclohexanol over cerium-doped MCM-41[J].Journal of molecular catalysis, A. Chemical,2006(1/2):162-166. |
| [12] | Alessandra Fonseca Lucredio;Gregory Jerkiewickz;Elisabete Moreira Assaf .Nickel catalysts promoted with cerium and lanthanum to reduce carbon formation in partial oxidation of methane reactions[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2007(1):90-95. |
| [13] | 崔梅生,杨东,何柱生,宋永吉,黄小卫,陈霭璠.氧化铈负载CuO催化材料对甲烷燃烧的催化作用[J].中国稀土学报,2004(05):605-608. |
| [14] | Timofeeva MN;Jhung SH;Hwang YK;Kim DK;Panchenko VN;MeIgunov MS;Chesalov YA;Chang JS .Ce-silica mesoporous SBA-15-type materials for oxidative catalysis: Synthesis, characterization, and catalytic application[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2007(1):1-10. |
| [15] | Hidenori Yahiro;Tatsuya Nagano;Hiroyuki Yamaura .Direct decomposition of nitrogen monoxide over Cu-MFI containing rare-earth elements:Sm and Gd as promoter[J].Catalysis Today,2007(3/4):284-289. |
| [16] | 张俊平,王艳,戚慧心.铕、铈、钇离子对TiO2催化剂的改性作用[J].中国稀土学报,2002(05):478-480. |
| [17] | 袁华军,安越,徐国华,陈长聘.Kinetics of Liquid-Phase Hydrogenation of Toluene Catalyzed by Hydrogen Storage Alloy MlNi5[J].稀土学报(英文版),2004(03):385-389. |
| [18] | 李凤仪,石秋杰,罗来涛,王祥生.稀土对非晶态NiB合金催化剂性能的影响[J].中国稀土学报,1999(04):338-341. |
| [19] | 马迪,梅大江,李璇,龚茂初,陈耀强.稀土等碱性助剂对甲烷部分氧化制合成气整体式Ni/γ-Al2O3催化剂性能的影响[J].中国稀土学报,2006(03):293-297. |
| [20] | 钱海燕,邓敏,徐玲玲.水化法制备超细Mg（OH）2的研究[J].南京工业大学学报（自然科学版）,2005(02):30-33. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%