Rare earth-doped copper-manganese mixed oxide catalysts were prepared by coprecipitation and mechanical mixing using copper sulfate, manganese sulfate, and rare-earth oxides REO (REO indicates La2O3, CeO2, Y2O3, or Pr6O11) as raw materials. The samples were characterized by X-ray diffraction (XRD), temperature-programmed reduction (TPR), temperature-programmed reduc-tion of oxidized surfaces (s-TPR), and temperature-programmed desorption (TPD). Catalytic activities were tested for a water-gas shift reaction. Doping rare earth oxides did not alter the crystal structure of the original copper-manganese mixed oxides but changed the interplanar spacing, adsorption performance and reaction performance. Doping with La2O3 enhanced the activity and stability of Cu-Mn mixed oxides because of high copper distribution and fine reduction. Doping with CeO2 and Y2O3 also decreased the reduc-tion temperatures of the samples to different degrees while improving the dispersion of Cu on the surface, thus, catalytic activity was better than that of undoped Cu-Mn sample. The Pr6O11-doped sample was difficult to reduce, the dispersion of surface coppers was lowered, resulting in poor activity.
参考文献
| [1] | 刘全生,张前程,马文平,何润霞,寇丽杰,牟占军.变换催化剂研究进展[J].化学进展,2005(03):389-398. |
| [2] | Liu Q;Wang L C;Chen M;Liu Y M Cao Y He T Y Fan K N .Waste-free soft reactive grinding synthesis of high-surface-area copper-manganese spinel oxide catalysts highly effective for methanol steam reforming[J].Catalysis Letters,2008,121:144. |
| [3] | Tatyana Tabakova;Flora Boccuzzi;Maela Manzoli;Donka Andreeva .FTIR study of low-temperature water-gas shift reaction on gold/ceria catalyst[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2003(2):385-397. |
| [4] | WANG Luhui,LIU Hui,LIU Yuan,CHEN Ying,YANG Shuqing.Influence of preparation method on performance of Ni-CeO2 catalysts for reverse water-gas shift reaction[J].稀土学报（英文版）,2013(06):559-564. |
| [5] | Yohei Tanaka;Toshimasa Utaka;Ryuji Kikuchi;Koichi Eguchi;Kazunari Sasaki .Water gas shift reaction over Cu-based mixed oxides for CO removal from the reformed fuels[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2003(2):287-295. |
| [6] | Siham Behar;Philippe Gonzalez;Pierre Agulhon .New synthesis of nanosized Cu-Mn spinels as efficient oxidation catalysts[J].Catalysis Today,2012(1):35-41. |
| [7] | 智科端,刘全生,张亚刚,何爽,何润霞.沉淀剂对铜锰复合氧化物变换催化剂构效的影响[J].燃料化学学报,2010(04):445-451. |
| [8] | 何润霞,刘全生,智科端,崔协力.沉淀剂加入速度对Cu-Mn复合氧化物结构和变换反应活性的影响[J].燃料化学学报,2008(06):767-771. |
| [9] | Zhi K D;Liu Q S;He R X.Meso-and macroporous struc-ture copper manganese mixed oxide catalyst for water gas shift reaction[A].Seoul Korea,2008 |
| [10] | Buciuman F;Patcas F;Hahn T .Synergy effect between copper and manganese oxides in hopcalite catalysts[J].Studies in surface science and catalysis,2001,138:315. |
| [11] | Joan Papavasiliou;George Avgouropoulos;Theophilos loannides .Combined steam reforming of methanol over Cu-Mn spinel oxide catalysts[J].Journal of Catalysis,2007(1):7-20. |
| [12] | Tanaka Y.;Utaka T.;Kikuchi R.;Takeguchi T.;Sasaki K.;Eguchi K. .Water gas shift reaction for the reformed fuels over Cu/MnO catalysts prepared via spinel-type oxide[J].Journal of Catalysis,2003(2):271-278. |
| [13] | Tanaka Y;Takeguchi T;Kikuchi R;Eguchi K .Influence of preparation method and additive for Cu-Mn spinel oxide catalyst on water gas shift reaction of reformed fuels[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2005(1/2):59-66. |
| [14] | Zhang YJ;Hu QX;Hu B;Fang ZY;Qian YT;Zhang ZD .Preparation, characterization and application of a new kind of mesoporous composite[J].Materials Chemistry and Physics,2006(1):16-21. |
| [15] | Liu Q S;He R X;Cui X L;Zhi K D, Ma W P .A thermo-stable Cu-Mn based catalyst for high temperature wa-ter-gas-shift reaction[J].Am Chem Soc Div Fuel Chem,2005,50(02):642. |
| [16] | Mirzaei AA;Shaterian HR;Kaykhaii M .The X-ray photoelectron spectroscopy of surface composition of aged mixed copper manganese oxide catalysts[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2005(2):246-254. |
| [17] | Mirzaei A;Shaterian H;Habibi M .Characterisation of copper-manganese oxide catalysts:effect of precipitate ageing upon the structure and morphology of precursors and catalysts[J].Applied Catalysis A:General,2003,253:499. |
| [18] | Tabakova T;Idakiev V;Avgouropoulos G;Papavasiliou J, Manzoli M, Boccuzzi F, Ioannides T .Highly active copper catalyst for low-temperature water-gas shift reaction pre-pared via a Cu-Mn spinel oxide precursor[J].Applied Catalysis A:General,2013,451(01):184. |
| [19] | Andreeva D;Ivanov I;Ilieva L;Ilievaa L, Abrashevb M V, Zanellac R, Sobczakd J W, Lisowskid W, Kantchevae M, Avdeevf G, Petrovf K .Gold catalysts supported on ceria doped by rare earth metals for water gas shift reac-tion:Influence of the preparation method[J].Applied Catalysis A:General,2009,357:159. |
| [20] | Liu Z G.Investigation on Preparation and Performance of CO Preferential Oxidation Catalysts in Hydrogen-rich Gas[M].Hangzhou:Zhejiang University,2007 |
| [21] | Tabakova T;Idakiev V;Papavasiliou J;Avgouropoulos G Ioannides T .Effect of additives on the WGS activity of combustion synthesized CuO/CeO2 catalysts[J].CATALYSIS COMMUNICATIONS,2007,8(01):101. |
| [22] | 张兆春,章启贤,殷亚青,吴帆,喻旭芳,许燕侦,李斌.铜锰氧化物水煤气变换催化剂的还原与催化性能[J].工业催化,2008(07):30-35. |
| [23] | He R X;Liu Q S;Wu F;Zhou C L Zhi K D Yao H B .Effects of La-doping on the structure and performance of copper-manganese oxides for the water-gas shift reaction[J].Adv Mater Res,2012,512-515:2131. |
| [24] | Du X R;Yuan Z S;Cao L;Zhang C X Wang S D .Water gas shift reaction over Cu-Mn mixed oxides catalysts:Ef-fects of the third metal[J].FUEL PROCESSING TECHNOLOGY,2008,89(02):131. |
| [25] | Evin H N;Jacobs G;Ruiz-Martinez J;Graham U M Doz-ier A Thomas G Davis B H .Low temperature water-gas shift/methanol steam reforming:Alkali doping to facilitate the scission of formate and methoxy C-H bonds over Pt/ceria catalyst[J].Catalysis Letters,2008,122:9. |
| [26] | Morales M R;Barbero B P;Cadús L E .Total oxidation of ethanol and propane over Mn-Cu mixed oxide catalysts[J].Appl Catal B,2006,67(3-4):229. |
| [27] | A.Satyanarayana Reddy;Chinnakonda S.Gopinath;Satyanarayana Chilukuri .Selective ortho-methylation of phenol with methanol over copper manganese mixed-oxide spinel catalysts[J].Journal of Catalysis,2006(2):278-291. |
| [28] | Yahiro H;Nakaya K;Yamamoto T;Saiki K Yamaura H .Effect of calcination temperature on the catalytic activity of copper supported on c-alumina for the water-gas-shift reaction[J].CATALYSIS COMMUNICATIONS,2006,7:228. |
| [29] | Li J T;Zhang W D;Chen M D;Qu Z S .TPD and TPSR studies of CO2 adsorption on Cu-based catalysts[J].Natural Gas Chemical Industry(in Chin ),1998,23(05):14. |
| [30] | Zhi K D.Analysis,Optimization of the Reaction Precipita-tion Process and Controlled Synthesis of Copper-Based Mixed Oxides Catalyst for Water-Gas Shift Reaction[M].Hu-hehaote:Inner Mongolia University of Technology,2010 |
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%