| 학회 | 한국공업화학회 |
| 학술대회 | 2005년 가을 (10/28 ~ 10/29, 건국대학교) |
| 권호 | 9권 2호 |
| 발표분야 | 촉매 |
| 제목 | Re-examination of Three Widely Accepted Chemical Concepts |
| 초록 | The following three chemical concepts have been widely accepted worldwide for a long time. Experimental evidences that might be in conflict with these concepts will be presented to argue against these believes: 1. The zeolite structure is destroyed by deposition of V2O5 in the FCC operation process 2. The carbon dioxide remains as an independent stable spectator in all oxidation reaction systems 3. The nitrogen functions as an inert gas in the MC-type liquid-phase O2 oxidation of p-xylene. The results obtained from the Demet IV process, which vanadium pentoxide alone was removed while both Ni and Fe remained intact in the FCC catalyst structure, are presented to ascertain that the vanadium deposited on the FCC catalyst, does not attributed to the destruction of the zeolite structure. Thus the zeolite structure was rejuvenated by selectively removing V2O5 from the deactivated FCC catalyst. In short, the zeolite structure is not permanently destroyed by the V-deposition. The experimental data obtained by the partial oxidation of p-xylene to terephthaldehyde in the gas-phase oxidation over the CVD Fe/Mo/DBH will be presented to claim that the CO2 acts as one-oxygen transfer oxidant. To augment this observation, the experimental data obtained from the liquid-phase oxidation of p-xylene to terephthalic acid in the Co/Mn/Br system will also be introduced. The nitrogen molecule does not remain as an independent spectator gas in the MC-type oxidation system. A significant improvement of the catalytic activity of p-xylene to terephthalic acid will be cited to show that N2 directly participates in the oxidation reaction. The oxidation kinetics was significantly influenced by the presence of N2 molecules in suppressing the oxidation reaction. The plausible mechanistic views are postulated. |
| 저자 | 유진선1, 김형록2, 이진구1, 김두성1 |
| 소속 | 1(주)코캣, 2한국화학(연) |
| 키워드 | zeolite; V2O5; FCC; CO2; p-xylene |
