制备了含有少量Ni,Co,Cu或K的Mo2C/Al2O3催化剂,用于甲烷部分氧化(POM)制合成气反应,并用程序升温表面反应(TPSR)进行了表征. Ni可以促进氧化钼被氢还原,进而促进氧化钼的碳化及甲烷的活化,故Ni改性催化剂具有很高的催化活性和选择性,并且有很高的催化稳定性. Co也可以促进氧化钼的碳化及甲烷的活化,故Co改性催化剂也具有较高的催化活性和稳定性. Cu的添加有利于氧化钼的碳化及甲烷的活化,故Cu改性催化剂在开始阶段表现出对甲烷转化的促进作用,但随后其促进作用消失,与Cu的存在状态发生变化有关; Cu改性催化剂具有较低的选择性,则与其促进氧的活化作用有关. K的添加不利于氧化钼的碳化及甲烷的活化,故K改性催化剂的催化活性和选择性较低.
参考文献
[1] | Levy R B;Boudart M .[J].科学(上海),1973,181(4099):547. |
[2] | Schlatter J C;Oyama S T;Metcalfe J E Ⅲ;Lambert J M Jr .[J].Industrial and Engineering Chemistry Research,1988,27(09):1648. |
[3] | Lee J S;Boudart M .[J].Applied Catalysis,1985,19(01):207. |
[4] | Abe H;Bell A T .[J].Catalysis Letters,1993,18(1-2):1. |
[5] | Choi JG.;Thompson LT.;Brenner JR. .PYRIDINE HYDRODENITROGENATION OVER MOLYBDENUM CARBIDE CATALYSTS[J].Journal of Catalysis,1995(1):33-40. |
[6] | Iglesia E;Ribeiro F H;Boudart M;Baumgartner J E .[J].Catalysis Today,1992,15(3-4):455. |
[7] | Pham-Huu C;York A P E;Benaissa M;Del Gallo P,Ledoux M J .[J].Industrial and Engineering Chemistry Research,1995,34(04):1107. |
[8] | Nagai M;Kurakami T;Omi S .[J].Catalysis Today,1998,45(1-4):235. |
[9] | Park K Y;Seo W K;Lee J S .[J].Catalysis Letters,1991,11(3-6):349. |
[10] | Woo H C;Park K Y;Kim Y G;Nam I-S Chung J S Lee J S .[J].Applied Catalysis,1991,75(02):267. |
[11] | Nakazawa M;Okamoto H .[J].Surface Science Applications,1985,24(01):75. |
[12] | York A P E;Claridge J B;Brungs A J;Tsang S C Green M L H.[J].Journal of the Chemical Society,Chemical Communications,1997(01):39. |
[13] | Claridge JB.;Brungs AJ.;Marquez-Alvarez C.;Sloan J.;Tsang SC.;Green MLH.;York APE. .New catalysts for the conversion of methane to synthesis gas: Molybdenum and tungsten carbide[J].Journal of Catalysis,1998(1):85-100. |
[14] | 朱全力,杨建,季生福,王嘉欣,汪汉卿.Mo2C/Al2O3催化剂用于甲烷部分氧化(POM)制合成气的研究[J].分子催化,2003(02):118-123. |
[15] | Xiao T C;York A P E;Al-Megren H;Williams C V,Wang H T .[J].Journal of Catalysis,2001,202(01):100. |
[16] | Arnoldy P;de Jonge J C M;Moulijn J A .[J].Journal of Physical Chemistry,1985,89(21):4517. |
[17] | 熊国兴;张卫民;陈恒荣;姚丽君,盛世善 .[J].分子催化,1992,6(03):183. |
[18] | 熊国兴;谭长青;王弘立 .[J].物理化学学报,1989,5(03):370. |
[19] | Delportc P;Meunier F;Pham-Huu C;Vennegues P,Ledoux M J,Guille J .[J].Catalysis Today,1995,23(03):251. |
[20] | Leclercq G.;Giraudon JM.;Devassine P.;Feigenbaum L.;Leclercq L.;Frennet A.;Bastin JM.;Lofberg A.;Decker S.;Dufour M.;Kamal M. .STUDY OF THE PREPARATION OF BULK POWDER TUNGSTEN CARBIDES BY TEMPERATURE PROGRAMMED REACTION WITH CH4+H-2 MIXTURES[J].Journal of Catalysis,1996(1):142-169. |
[21] | Davidson C F;Alexander G B;Wadsworth M E .[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1978,9B(04):553. |
[22] | Bouchy C;Pham-Huu C;Heinrich B;Chaumont C,Ledoux M J .[J].Journal of Catalysis,2000,190(01):92. |
[23] | Oshikawa K;Nagai M;Omi S .[J].Journal of Physical Chemistry B,2001,105(38):9124. |
[24] | Miao Q;Xiong G X;Sheng Sh Sh;Cui W Xu L Guo X X .[J].Applied Catalysis A:General,1997,154(1-2):17. |
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