以FeCuK/SiO2为母体催化剂,用不同浓度的NH4HSO4水溶液进行等体积浸渍,制备了不同SO2-4含量的费托合成(FTS)铁基催化剂.采用原子发射光谱、低温N2吸附、 X射线光电子能谱、程序升温还原和穆斯堡尔谱等技术对催化剂进行了表征,并在H2/CO摩尔比0.67,WHSV=2 000 h-1,压力1.5 MPa和温度250 ℃条件下进行了浆态床FTS反应.结果表明,少量SO2-4能促进催化剂在H2中的还原;在合成气还原过程中,少量SO2-4对催化剂的碳化程度影响不大,但大量SO2-4严重抑制催化剂的碳化.在约500 h的运行实验中,各催化剂样品表现出的催化活性有所差异,但均呈现较好的稳定性.SO2-4可抑制水煤气变换反应活性,且随着SO2-4含量的增加,抑制作用愈加明显;同时,催化剂上浸渍少量SO2-4可有效抑制CH4的生成,提高低碳烯烃的选择性.
参考文献
| [1] | Bukur D B;Sivaraj C .[J].Applied Catalysis A:General,2002,231(1-2):201. |
| [2] | Davis B H .[J].Catalysis Today,2003,84(1-2):83. |
| [3] | Dry M E.[A].New York:Springer-Verlag,1981:159. |
| [4] | 刘福霞,郝庆兰,王洪,杨勇,白亮,朱玉雷,田磊,张志新,相宏伟,李永旺.钾助剂对F-T合成铁基催化剂浆态床反应性能的影响[J].催化学报,2004(11):878-886. |
| [5] | Li S;Li A;Krishnamoorthy S;Iglesia E .[J].Catalysis Letters,2001,77(04):197. |
| [6] | Yang Y;Xiang H W;Xu Y Y;Bai L Li Y W .[J].Applied Catalysis A:General,2004,266(02):181. |
| [7] | Anderson R B;Karn F S;Shultz J F .[J].Journal of Catalysis,1965,4(01):56. |
| [8] | Stenger H G Jr;Satterfield C N .[J].Industrial & Engineering Chemistry Process Design and Development,1985,24(02):415. |
| [9] | Wu B S;Bai L;Xiang H W;Li Y W Zhang Zh X Zhong B .[J].Fuel,2004,83(02):205. |
| [10] | Wu B S;Tian L;Bai L;Zhang Zh X Xiang H W Li Y W .[J].Catalysis Communications,2004,5(05):253. |
| [11] | Bromfield T C;Coville N J .[J].Applied Catalysis A:General,1999,186(1-2):297. |
| [12] | Barrault J;Forquy C;Perrichon V .[J].Applied Catalysis,1983,5(01):119. |
| [13] | Kritzinger J A .[J].Catalysis Today,2002,71(3-4):307. |
| [14] | 郝庆兰,王洪,刘福霞,白亮,张志新,相宏伟,李永旺.焙烧温度对铁基催化剂催化浆态床F-T合成反应性能的影响[J].催化学报,2005(04):340-348. |
| [15] | Srinivasan R;Taulbee D;Davis B H .[J].Catalysis Letters,1991,9(1-2):1. |
| [16] | Bukur DB.;Rosynek MP.;Li CP.;Wang DJ.;Rao KRPM.;Huffman GP.;Okabe K. .ACTIVATION STUDIES WITH A PRECIPITATED IRON CATALYST FOR FISCHER-TROPSCH SYNTHESIS .1. CHARACTERIZATION STUDIES[J].Journal of Catalysis,1995(2):353-365. |
| [17] | Jin Y M;Datye A K .[J].Journal of Catalysis,2000,196(01):8. |
| [18] | Yang J;Sun Y C;Tang Y;Liu Y Wang H L Tian L Wang H Zhang Zh X Xiang H W Li Y W .[J].Journal of Molecular Catalysis A:Chemical,2006,245(1-2):26. |
| [19] | Li S Z;Meitzner G D;Iglesia E .[J].Journal of Physical Chemistry B,2001,105(24):5743. |
| [20] | Mansker L D;Jin Y M;Burker D B;Datye A K .[J].Applied Catalysis A:General,1999,186(1-2):277. |
| [21] | Zhang C H;Yang Y;Teng B T;Li T Z Zheng H Y Xiang H W Li Y W .[J].Journal of Catalysis,2006,237(02):405. |
| [22] | Sudsakorn K;Goodwin J G;Adeyiga A A .[J].Journal of Catalysis,2003,213(02):204. |
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