Promotion effects of air and H2 nonthermal plasmas on TiO2 supported Pd and Pd-Ag catalysts for selective hydrogenation of acetylene

被引:31
作者
Shi, Chunkai [1 ]
Hoisington, Ryan [1 ]
Jang, Ben W. -L. [1 ]
机构
[1] Texas A&M Univ, Dept Chem, Commerce, TX 75429 USA
关键词
D O I
10.1021/ie0701468
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Selective hydrogenation of acetylene in rich ethylene was investigated over uncalcined, air plasma, and H-2 plasma Pd/TiO2 and Pd-Ag/TiO2 catalysts. Air and H-2 plasma treatments have different modifying effects on Pd/TiO2 catalyst for selective hydrogenation of acetylene to ethylene. With additional Ag loadings, 1% and 3%, on Pd/TiO2, plasma treatments shift the temperature of maximum C2H4 yield to lower temperatures as compared to Ag shifting the maximum yield temperature to higher temperatures. Air plasma treatment alone on Pd/TiO2 produces the highest maximum C2H4 yield at the lowest temperature among all catalysts tested. H-2 plasma, on the other hand, is more effective in enhancing the performance of the Pd-1%Ag/TiO2 catalyst. Both air and H-2 plasmas show the capability to shift the maximum yield temperatures of Pd/TiO2 and Pd-Ag/TiO2 catalysts to lower temperatures. It provides a new avenue to fine-tune the catalytic reactivity of supported Pd catalysts with or without the Ag promoter to selectively convert acetylene to ethylene in excess of ethylene to meet various industrial demands.
引用
收藏
页码:4390 / 4395
页数:6
相关论文
共 17 条
[1]   New palladium catalysts prepared by glow discharge plasma for the selective hydrogenation of acetylene [J].
Chen, MH ;
Chu, W ;
Dai, XY ;
Zhang, XW .
CATALYSIS TODAY, 2004, 89 (1-2) :201-204
[2]   The surface science of titanium dioxide [J].
Diebold, U .
SURFACE SCIENCE REPORTS, 2003, 48 (5-8) :53-229
[3]   Vapor-phase hydrogenation of crotonaldehyde on titania-supported Pt and PtSn SMSI catalysts [J].
Huidobro, A ;
Sepúlveda-Escribano, A ;
Rodríguez-Reinoso, F .
JOURNAL OF CATALYSIS, 2002, 212 (01) :94-103
[4]   The influence of catalyst restructuring on the selective hydrogenation of acetylene to ethylene [J].
Jin, YM ;
Datye, AK ;
Rightor, E ;
Gulotty, R ;
Waterman, W ;
Smith, M ;
Holbrook, M ;
Maj, J ;
Blackson, J .
JOURNAL OF CATALYSIS, 2001, 203 (02) :292-306
[5]   Selective hydrogenation of acetylene on TiO2-added Pd catalysts [J].
Kang, JH ;
Shin, EW ;
Kim, WJ ;
Park, JD ;
Moon, SH .
JOURNAL OF CATALYSIS, 2002, 208 (02) :310-320
[6]   Surface characterisation of Pd-Ag/Al2O3 catalysts for acetylene hydrogenation using an improved XPS procedure [J].
Lamb, RN ;
Ngamsom, B ;
Trimm, DL ;
Gong, B ;
Silveston, PL ;
Praserthdam, P .
APPLIED CATALYSIS A-GENERAL, 2004, 268 (1-2) :43-50
[7]   Selective hydrogenation of 1,3-butadiene on TiO2-modified Pd/SiO2 catalysts [J].
Lee, DC ;
Kim, JH ;
Kim, WJ ;
Kang, JH ;
Moon, SH .
APPLIED CATALYSIS A-GENERAL, 2003, 244 (01) :83-91
[8]   Strong metal-support interaction and catalytic properties of anatase and rutile supported palladium catalyst Pd/TiO2 [J].
Li, YZ ;
Fan, YN ;
Yang, HP ;
Xu, BL ;
Feng, LY ;
Yang, MF ;
Chen, Y .
CHEMICAL PHYSICS LETTERS, 2003, 372 (1-2) :160-165
[9]  
Liu CJ, 2006, PURE APPL CHEM, V78, P1227, DOI 10.1351/pac200678061227
[10]   Characterisations of Pd-Ag/Al2O3 catalysts for selective acetylene hydrogenation:: effect of pretreatment with NO and N2O [J].
Ngamsom, B ;
Bogdanchikova, N ;
Borja, MA ;
Praserthdam, P .
CATALYSIS COMMUNICATIONS, 2004, 5 (05) :243-248