SiO_2催化剂的制备及其甲烷催化燃烧性能的研究被引量：6

Preparation of Pd/Ce_xZr_(1-x)O_2/SiO_2 and its catalytic performance in methane combustion

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摘要采用浸渍法制备了Pd质量分数为0.1%～1.0%的Pd/SiO2和Pd/5%CexZr1-xO2/SiO2(x=0.0～1.0)系列催化剂,在微型固定床反应器上对催化剂的甲烷催化燃烧性能进行了评价,用XRD、H2-TPR等分析测试技术对催化剂的结构进行了表征.结果表明,Pd/SiO2和Pd/CexZr1-xO2/SiO2催化剂都具有较好的甲烷催化燃烧活性,CexZr1-xO2可以明显提高催化剂的催化活性,并且Ce和Zr的比值对催化剂催化活性也有显著的影响.XRD和TPR显示,Pd/CexZr1-xO2/SiO2催化剂中的CexZr1-xO2对PdO的分散性和还原性有较好的促进作用. A series of Pd/SiO2 and Pd/CexZr1-xO2/SiO2(x=0.0~1.0) catalysts with Pd loading from 0.1% to 1.0% were prepared by impregnation and characterized using X-ray powder diffraction and H2-temperature-programmed reduction.Their performance in catalytic methane combustion was evaluated in a conventional quartz reactor.The effects of CeO2 and CeZrO2 solid solutions on the performance of Pd/SiO2 were investigated.The results indicated that Pd/SiO2 exhibit good catalytic activity in methane combustion,and the addition of CexZr1-xO2 can further markedly enhance its catalytic activity.CexZr1-xO2 can promote the dispersion and reducibility of PdO in Pd/CexZr1-xO2/SiO2.The molar ratio of Ce to Zr in CexZr1-xO2 plays an important role on the catalytic activity of Pd/CexZr1-xO2/SiO2.

作者周忠良季生福银凤翔卢泽湘李成岳

机构地区北京化工大学化工资源有效利用国家重点实验室

出处《燃料化学学报》 EI CAS CSCD 北大核心 2007年第5期583-588,共6页 Journal of Fuel Chemistry and Technology

基金国家自然科学基金(20376005) 国家重点基础研究发展规划基金(973计划 2005CB221405)

关键词甲烷催化燃烧 Pd/SiO2 Pd/CexZr1-xO2/SiO2 XRD TPR catalytic combustion of methane Pd/SiO2 Pd/CexZr1-xO2/SiO2 XRD TPR

分类号 O643 [理学—物理化学]

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1[1]GLIN P,PRIMET M.Complete oxidation of methane at low temperature over noble metal based catalysts:Review[J].Appl Catal B,2002,39(1):1-37.
2[4]BURCH R,URBANO F J.Investigation of the active state of supported palladium catalysts in the combustion of methane[J].Appl Cata1 A,1995,124(1):121-138.
3[5]REYES P,FIGUEROA A,PECCHI G,FIERRO J L G.Catalytic combustion of methane on Pd-Cu/SiO2 catalysts[J].Catal Today,2000,62(2-3):209-217.
4[6]EGUCHI K,ARAI H.Low temperature oxidation of methane over Pd-based catalysts:Effect of support oxide on the combustion activity[J].Appl Catal A,2001,222(1-2):359-367.
5[7]THEVENIN P O,ALCALDE A,PETTERSSON L J,JRS S G,FIERRO J L G.Catalytic combustion of methane over cerium-doped palladium catalysts[J].J Catal,2003,215(1):78-86.
6[9]LIOTTA L F,DEGANELLO G,SANNINO D,GAUDINO M C,CIAMBELLI P,GIALANELLA S.Influence of barium and cerium oxides on alumina supported Pd catalysts for hydrocarbon combustion[J].Appl Catal A,2002,229(1-2):217-22.
7[10]FORNASIERO P,MONTE R D,RAO G R,KAPAR J,MERIANI S,TROVARELLI A,GRAZIANI M.Rh-loaded CeO2-ZrO2 solid-solutions as highly efficient oxygen exchangers:Dependence of the reduction behavior and the oxygen storage capacity on the structural-properties[J].J Catal,1995,151(1):168-177.
8[12]YUE B-H,ZHOU E-X,WANG Y-J,HAN X-X,ZHENG X-M.Study on the combustion behavior of methane over Ce-Zr-modified Pd/Al2O3 catalysts[J].Appl Surf Sci,2005,246(1-3):36-43.
9[15]AHLSTRM-SILVERSAND A F,ODENBRAND C U I.Combustion of methane over a Pd-Al2O3/SiO2 catalyst,catalyst activity and stability[J].Appl Catal A,1997,153(1-2):157-175.
10[16]GEUS J W,GIEZEN J C V.Monoliths in catalytic oxidation[J].Catal Today,1999,47(14):169-180.