分别以K2RuO4,Ru(Ac)3和RuC13为Ru前驱体,制备了Ru/MgO-CeO2催化剂,并运用X射线衍射、X射线荧光光谱,CO吸附、N2物理吸附和H2程序升温还原等技术对催化剂进行了表征,考察了Ru前驱体对Ru/MgO-CeO2催化剂氨合成性能的影响.结果表明,Ru前驱体对载体MgO-CeO2和Ru的还原件能、氯残留量和催化剂比表面积的影响都很大,从而导致催化剂的氨合成性能的不同.其中以K2RuO4为Ru前驱体制备的催化剂的载体和Ru容易还原,无氯离子,且比表面积较高,因而催化剂活性和氨合成转换频率较高.在10MPa,425℃,10 000h-1条件下,K2RuO4,Ru(Ac)3和RuC13作前驱体制备的催化剂上氨合成转换频率比为1.33:1.05:1.
参考文献
[1] | Zeng H S;Inazu K;Aika K .[J].Applied Catalysis A:General,2001,219:235. |
[2] | Bielawa H;Hinrichsen O;Birkner A;Muhler M .[J].Angewandte Chemie International Edition,2001,40:1061. |
[3] | Li Z L;Liang C H;Feng Z C;Ying P L Wang D Z Li C .[J].J Mol Catl A,2004,211:103. |
[4] | Kowalczyk Z;Jodzis S;Rarog W;Zielinski J,Pielaszek J .[J].Applied Catalysis A:General,1998,173:153. |
[5] | Moggi P;Predieri G;Maione A .[J].Catalysis Letters,2002,79:7. |
[6] | Xu Q C;Lin J D;Fu X Z;Liao D W .[J].Catalysis Communications,2008,9:1214. |
[7] | Aika K;Takano T;Murata S .[J].Journal of Catalysis,1992,136:126. |
[8] | Niwa Y;Aika K .[J].Chemistry Letters,1996,25:3. |
[9] | Niwa Y;Aika K .[J].Journal of Catalysis,1996,162:138. |
[10] | Saito, M;Itoh, M;Iwamoto, J;Li, CY;Machida, K .Synergistic effect of MgO and CeO2 as a support for ruthenium catalysts in ammonia synthesis[J].Catalysis Letters,2006(3/4):107-110. |
[11] | Moggi P.;Predieri G.;Spoto G.;Albanesi G. .RUTHENIUM CLUSTER-DERIVED CATALYSTS FOR AMMONIA SYNTHESIS[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,1995(1):145-159. |
[12] | Szmigiel D;Rar6g-Pilecka W;Miskiewicz E;Glinski M Kielak M Kaszkur Z Kowalczyk Z .[J].Applied Catalysis A:General,2004,273:105. |
[13] | Liang C H;Wei Zh B;Xin Q;Li C .[J].Applied Catalysis A:General,2001,208:193. |
[14] | Rarog W;Kowalczyk Z;Sentek J;Skladanowski D Zielinski J .[J].Catalysis Letters,2000,68:163. |
[15] | 柴海芳,韩文锋,朱虹,刘化章.氯对钌基氨合成催化剂的影响[J].化学进展,2006(10):1262-1269. |
[16] | Murata S;Aika K .[J].Journal of Catalysis,1992,136:110. |
[17] | Rossetti I;Forni L .[J].Applied Catalysis A:General,2005,282:315. |
[18] | 倪军,王榕,林建新,魏可镁.氯化钌氨作前驱体制备高活性的氨合成催化剂[J].催化学报,2009(03):185-190. |
[19] | 罗小军,王榕,林建新,魏可镁.沉淀方法对Ru/CeO_2氨合成催化剂催化性能的影响[J].催化学报,2009(11):1125-1130. |
[20] | Murata S;Aika K .[J].Applied Catalysis A:General,1992,82:1. |
[21] | Jacobs G;Chenu E;Patterson P M;Williams L Sparks D Thomas G Davis B H .[J].Applied Catalysis A:General,2004,258:203. |
[22] | Hosokawa S;Kanai H;Utani K;Taniguchi Y I Saito Y Imamura S .[J].Applied Catalysis B:Environmental,2003,45:181. |
[23] | Bachiller-Baeza B;Guerrero-Ruiz A;Rodriguez-Ramos I .[J].J Carol,2005,229:439. |
[24] | Izumi Y;Iwam Y;Aika K .[J].Journal of Physical Chemistry,1996,100:9421. |
[25] | Chary K V R;Srikanth C S;Venkat-Rao V .[J].Catalysis Communications,2009,10:459. |
[26] | Luo X J;Wang R;Ni J;Lin J X Lin B Y Xu X M Wei K M .[J].Catalysis Letters,2009,133:382. |
[27] | Shiflett W K;Dumesic J A .[J].Abstract paper of ACS,1981,182:178. |
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