Реферат: Four series of molecular sieve catalysts of different structural types, ZSM-11, L, Y and MCM-41 have been prepared. Each type of materials was modified to obtain acidic (H-forms), basic (Cs-forms impregnated with CsOH) and redox (modified with V2O5) catalysts. The catalysts were characterized by AES, XRD, FTIR, 29Si, 27Al, 1H and 133 Cs MAS NMR, NH3-TPD, CO2-TPD, TPR and nitrogen adsorption. The catalytic activities of the materials in aniline methylation was evaluated in a continuous-flow microreactor system at temperatures of 523 to 723 K, a WHSV of 1.8 h−1 and a molar aniline/methanol ratio of 1:5. In situ13C MAS NMR was applied to study the mechanisms of N-and C-alkylation on acidic, basic and redox catalysts and to determine key parameters responsible for the catalyst activity, selectivity and stability. The best catalyst performance was observed on zeolite CsNaY/CsOH, which showed an aniline conversion of 99%, a selectivity to N-methylaniline of 98.7% and a high time-on-stream stability.

Библиографическая ссылка: Ivanova I.I. , Ponomoreva O.A. , Pomakhina E.B. , Knyazeva E.E. , Yuschenko V.V. , Hunger M. , Weitkamp J.
Aniline methylation on modified zeolites with acidic, basic and redox properties
Studies in Surface Science and Catalysis. 2002. V.142. P.659-666. DOI: 10.1016/s0167-2991(02)80086-6 Scopus OpenAlex

Идентификаторы БД:

Scopus:	2-s2.0-0036941149
OpenAlex:	W1578261010

Цитирование в БД:

БД	Цитирований
OpenAlex	6
Scopus	5

Альметрики: