| 학회 | 한국화학공학회 |
| 학술대회 | 2009년 가을 (10/22 ~ 10/23, 일산 KINTEX) |
| 권호 | 15권 2호, p.2350 |
| 발표분야 | 촉매 및 반응공학 |
| 제목 | Real Reaction Intermediates of Ethylbenzene Disproportionationover Large-Pore Zeolites |
| 초록 | Disproportionation of Ethylbenzene (EB) to benzene (B) and the three diethylbenzene (DEB) isomers isof particular importance, because p-DEB is a highly value-added species in some petrochemical processes. This reaction can also distinguish between medium- and large-pore zeolites, based on the occurrence of an induction period, which has led the Catalysis Commission of the International Zeolite Association to recommend it as a test reaction for the characterization of zeolite acidity. In present study we shows that not only monoethylated diphenylethane species but also diethylated ones are indeed formed inside the LaNa-Y cavities during the ethylbenzene disproportionation. By flushing the exactly same amount (50 mg) of used catalyst with pure N2 and monitoring the GC/MS intensity changes, wewere able to confirm that these species play a role as real intermediates of this reaction. Our work also provides clear experimental evidence that the latter diphenylethane derivatives play a more crucial role as reaction intermediates of ethylbenzene disproportionation, which leads us to propose a new dual-cycle mechanism for diethylbenzene formation over large-pore zeolites. |
| 저자 | 민형기, 홍석봉 |
| 소속 | 포항공과대 |
| 키워드 | heterogeneous catalysis; zeolites; ethylbenzene disproportionation; reaction intermediates; GC/MS |
| 원문파일 | 초록 보기 |
