Journal
CATALYSIS COMMUNICATIONS
Volume 9, Issue 14, Pages 2297-2302Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2008.03.032
Keywords
selective acetylene hydrogenation; Pd/alpha-Al2O3; Zn-modified alpha-Al2O3; sol-gel; solvothermal; nanocrystalline alpha-Al2O3
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Funding
- National Research Council of Thailand (NRCT)
- Thailand Research Fund (TRF)
- Commission on Higher Education
- Ministry of Education
- Graduate School of Chulalongkorn University
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The catalytic performance of Pd catalysts supported on nanocrystalline alpha-Al2O3 and Zn-modified alpha-Al2O3 prepared by sol-gel and solvothermal methods was studied in the selective hydrogenation of acetylene. Acidity of the nanocrystalline alpha-Al2O3 was significantly decreased by incorporation of Zn atoms in the of Al2O3. Both of acetylene conversions and ethylene selectivities were improved in the order: Pd/Zn-modified alpha-Al2O3-sol-gel > Pd/Zn-modified alpha-Al2O3-solvothermal > Pd/alpha-Al2O3-sol-gel approximate to Pd/alpha-Al2O3-solvothermal >> Pd/alpha-Al2O3-commerical. As revealed by thermal gravimetric and differential temperature analysis (TG-DTA), Pd catalysts on the nanocrystalline Zn-modified alpha-Al2O3 also showed less deactivation by coke formation. (c) 2008 Elsevier B.V. All rights reserved.
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