| Title: | Catalytic oxidation of butyl acetate over silver-loaded zeolites |
| Author(s): | Wong CT; Abdullah AZ; Bhatia S; |
| Address: | "School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Sri Ampangan, Nibong Tebal, Penang, Malaysia" |
| DOI: | 10.1016/j.jhazmat.2008.01.012 |
| ISSN/ISBN: | 0304-3894 (Print) 0304-3894 (Linking) |
| Abstract: | "The performance of silver-loaded zeolite (HY and HZSM-5) catalysts in the oxidation of butyl acetate as a model volatile organic compound (VOC) was studied. The objective was to find a catalyst with superior activity, selectivity towards deep oxidation product and stability. The catalyst activity was measured under excess oxygen condition in a packed bed reactor operated at gas hourly space velocity (GHSV)=15,000-32,000 h(-1), reaction temperature between 150 and 500 degrees C and butyl acetate inlet concentration of 1000-4000 ppm. Both AgY and AgZSM-5 catalysts exhibited high activity in the oxidation of butyl acetate. Despite lower silver content, AgY showed better activity, attributed to better metal dispersion, surface characteristics and acidity, and its pore system. Total conversion of butyl acetate was achieved at above 400 degrees C. The oxidation of butyl acetate followed a simple power law model. The reaction orders, n and m were evaluated under differential mode by varying the VOC partial pressure between 0.004 and 0.018 atm and partial pressure of oxygen between 0.05 and 0.20 atm. The reaction rate was independent of oxygen concentration and single order with respect to VOC concentration. The activation energies were 19.78 kJ/mol for AgY and 32.26 kJ/mol for AgZSM-5, respectively" |
| Keywords: | "Acetates/*chemistry Catalysis Equipment Design Ion Exchange Kinetics Microscopy, Electron, Scanning Oxidation-Reduction Particle Size Silver/*chemistry Temperature Zeolites/*chemistry;" |
| Notes: | "MedlineWong, Cheng Teng Abdullah, Ahmad Zuhairi Bhatia, Subhash eng Research Support, Non-U.S. Gov't Netherlands 2008/02/26 J Hazard Mater. 2008 Sep 15; 157(2-3):480-9. doi: 10.1016/j.jhazmat.2008.01.012. Epub 2008 Jan 12" |
