利用硅烷化作用分别制得了甲基、二甲基和三甲基改性的SiO2载体,采用等体积浸渍法制备了质量分数为5%的一系列负载型钴催化剂.考察了有机改性对催化剂费托合成催化性能的影响.结果表明, SiO2经有机基团改性后,表面硅羟基浓度减小,削弱了钴硅之间的相互作用,促进了催化剂的还原,提高了催化剂的活性,降低了甲烷选择性.由于空间位阻不同,不同有机基团改性的SiO2的表面硅羟基浓度不同,催化剂活性随着表面硅羟基浓度的减小而提高.
参考文献
| [1] | Zhang J L;Chen J G;Li Y W;Sun Y H .[J].Journal of Natural Gas Chemistry,2002,11(03):99. |
| [2] | Zhang JL.;Chen JG.;Ren J.;Sun YH. .Chemical treatment of gamma-Al2O3 and its influence on the properties of Co-based catalysts for Fischer-Tropsch synthesis[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2003(1):121-133. |
| [3] | 赵红霞,陈建刚,孙予罕.载体焙烧温度对Co/ZrO2催化剂催化F-T合成反应的影响[J].催化学报,2003(12):933-936. |
| [4] | Zhang Y;Hanayama K;Tsubaki N .[J].Catalysis Communications,2006,7(05):251. |
| [5] | Duan X L;Yuan D R;Sun Z H;Sun H Q Xu D Lu M K .[J].Journal of Crystal Growth,2003,252(1-3):4. |
| [6] | Li G S;Li L P;Smith R L;Inomata H .[J].Journal of Molecular Structure,2001,560(1-3):87. |
| [7] | Izutsu H;Nair P K;Maeda K;Kiyozumi Y Mizukami F .[J].Materials Research Bulletin,1997,32(09):1303. |
| [8] | Rao A V;Wagh P B;Haranath D;Risbud P P Kumbhare S D .[J].Ceramics International,1999,25(06):505. |
| [9] | Scherer G W.Relaxation in Glass and Composites[M].New York:wiley,1986:17. |
| [10] | Vansteen E.;Makhothe RA.;Micklethwaite C.;Manstein H. Delange M.;Oconnor CT.;Sewell GS. .TPR STUDY ON THE PREPARATION OF IMPREGNATED CO/SIO2 CATALYSTS[J].Journal of Catalysis,1996(2):220-229. |
| [11] | Schanke D.;Blekkan EA.;Hilmen AM.;Hoff A.;Holmen A.;Vada S. .STUDY OF PT-PROMOTED COBALT CO HYDROGENATION CATALYSTS[J].Journal of Catalysis,1995(1):85-95. |
| [12] | Zhou W;Chen J G;Fang K G;Sun Y H .[J].Fuel Processing Technology,2006,87(07):609. |
| [13] | Rodrigues E L;Bueno J M C .[J].Applied Catalysis A:General,2002,232(1-2):147. |
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%