Kim, SJ Jung, KD Joo, OS Kim, EJ Kang, TB 2024-01-21T06:40:22Z 2024-01-21T06:40:22Z 2021-09-05 2004-07-20 0926-860X https://pubs.kist.re.kr/handle/201004/137399 Ta-ilerite and Me/Ta-ilerite (Me = Pt, Pd) catalysts have been prepared using pillaring and impregnation methods, and tested as a catalyst for vapor phase Beckmann rearrangement of cyclohexanone oxime to E-caprolactam. It was found that Pt and I'd metal oxides played a very important role in improving the catalytic performance of Ta-ilerite. Me/Ta-ilerite catalysts showed higher lactam selectivities and yields than Ta-ilerite catalyst. Particularly, Pt/Ta-ilerite catalyst exhibited a relatively strong resistance for the deactivation of catalyst with time. These results were due to the changes of acid site distribution due to the metal loading on the Ta-ilerite. Pt oxide loading increased the number of relatively weak acid sites, while Pd oxide loading increased the number of medium acid sites. The results from NH3-TPD and the catalytic reaction demonstrated that weak acid sites were favorable for high catalytic efficiency in this catalyst system. (C) 2004 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV DECOMPOSITION METHOD PILLARED-ILERITE ZEOLITES Catalytic performance of metal oxide-loaded Ta-ilerite for vapor phase Beckmann rearrangement of cyclohexanone oxime Article 10.1016/j.apcata.2004.02.003 1 APPLIED CATALYSIS A-GENERAL, v.266, no.2, pp.173 - 180 APPLIED CATALYSIS A-GENERAL 266 2 173 180 scie scopus 000222055700005 2-s2.0-2442715329 Chemistry, Physical Environmental Sciences Chemistry Environmental Sciences & Ecology Article DECOMPOSITION METHOD PILLARED-ILERITE ZEOLITES Beckmann rearrangement epsilon-caprolactam Ta-ilerite metal oxide loading NH3-TPD acidity deactivation