Effect of the Surface Properties of γ-Al2O3 on the Conversion of Methanol into Dimethyl Ether According to in situ IR-Spectroscopic Data Научная публикация
| Журнал |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
||||||
|---|---|---|---|---|---|---|---|
| Вых. Данные | Год: 2020, Том: 61, Номер: 1, Страницы: 137-144 Страниц : 8 DOI: 10.1134/S0023158420010061 | ||||||
| Ключевые слова | alumina; dimethyl ether; methanol; methoxy groups | ||||||
| Авторы |
|
||||||
| Организации |
|
Информация о финансировании (1)
| 1 | Федеральное агентство научных организаций России | 0082-2014-0007 (АААА-А18-118020890105-3) |
Реферат:
Abstract: The samples of alumina of different origin exhibit different activity in the reaction of methanol dehydration to dimethyl ether (DME). To elucidate reasons for differences in their activity, a comparative study of the structural (XRD analysis, specific surface area, and porosity) and surface (Brønsted and Lewis acidity and hydroxyl coverage) properties of alumina samples was carried out. The presence of formates, aldehyde complexes, and bridging and terminal methoxy groups in different ratios on the surface of aluminum oxide samples under the reaction conditions of methanol conversion was detected using in situ IR spectroscopy. The reactivity of the detected surface compounds was compared for all of the samples. It was found that the activity of the samples in the formation of DME correlated with the rate of conversion of bridging methoxy groups. In turn, the rate of conversion of the bridging methoxy groups was determined by the acidity of bridging hydroxyl groups. An increase in acidity led to an increase in the bond strength of the methoxy group with the surface and a decrease in the rate of its conversion into DME. Linear methoxy groups underwent oxidative conversion into formate and aldehyde surface complexes. The nature of the oxidizing ability of an alumina surface is discussed. © 2020, Pleiades Publishing, Ltd.
Библиографическая ссылка:
Matyshak V.A.
, Sadykov V.A.
, Silchenkova O.N.
, Lin G.I.
, Rozovskii A.Y.
Effect of the Surface Properties of γ-Al2O3 on the Conversion of Methanol into Dimethyl Ether According to in situ IR-Spectroscopic Data
Kinetics and Catalysis. 2020. V.61. N1. P.137-144. DOI: 10.1134/S0023158420010061 WOS Scopus РИНЦ CAPlus OpenAlex
Effect of the Surface Properties of γ-Al2O3 on the Conversion of Methanol into Dimethyl Ether According to in situ IR-Spectroscopic Data
Kinetics and Catalysis. 2020. V.61. N1. P.137-144. DOI: 10.1134/S0023158420010061 WOS Scopus РИНЦ CAPlus OpenAlex
Оригинальная:
Матышак В.А.
, Садыков В.А.
, Сильченкова О.Н.
, Лин Г.И.
, Розовский А.Я.
Влияние свойств поверхности γ-Al2O3 на превращение метанола в ДМЭ по данным ИК-спектроскопии in situ
Кинетика и катализ. 2020. Т.61. №1. С.126-133. DOI: 10.31857/S0453881120010074RSCI РИНЦ OpenAlex
Влияние свойств поверхности γ-Al2O3 на превращение метанола в ДМЭ по данным ИК-спектроскопии in situ
Кинетика и катализ. 2020. Т.61. №1. С.126-133. DOI: 10.31857/S0453881120010074RSCI РИНЦ OpenAlex
Даты:
| Поступила в редакцию: | 18 февр. 2019 г. |
| Принята к публикации: | 1 июл. 2019 г. |
| Опубликована в печати: | 1 янв. 2020 г. |
| Опубликована online: | 29 мар. 2020 г. |
Идентификаторы БД:
| Web of science: | WOS:000522168200010 |
| Scopus: | 2-s2.0-85082751370 |
| РИНЦ: | 43255659 |
| Chemical Abstracts: | 2020:589910 |
| OpenAlex: | W3014582615 |