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Structural, Textural, and Acid–Base Properties of Layered Mg–Al Oxides Modified with a Tungstate or Phosphate and Their Activity and Selectivity in Gas-Phase Glycerol Dehydration Научная публикация

Журнал Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210
Вых. Данные Год: 2015, Том: 56, Номер: 5, Страницы: 605-616 Страниц : 12 DOI: 10.1134/S0023158415050109
Ключевые слова acidity, basicity, dehydration, glycerol, interlayer anion, layered double hydroxides, magnesium oxide, spinel
Авторы Korneeva E.V. 1 , Ivanova A.S. 1,2 , Bondareva V.M. 1 , Plyasova L.M. 1 , Glazneva T.S. 1,2
Организации
1 Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2 Novosibirsk State University, Novosibirsk, 630090 Russia

Информация о финансировании (2)

1 Министерство образования и науки Российской Федерации
2 Новосибирский национальный исследовательский государственный университет

Реферат: The effect of the nature of the anion (WO2- 4, [H2W12O40]6–, HPO2- 4) introduced into the interlayer space of Mg–Al hydroxides with Mg/Al = 3 on their structural, textural, acid–base, and catalytic properties has been investigated. The synthesized materials are layered Mg–Al hydroxides with a hydrotalcite-like structure. Heat treatment of these hydroxides at 450–600°C yields a MgO-based solid solution, which turns into a mixture of MgO and MgAl2O4 phases on being heat-treated at 900°C. The samples modified with the [H2W12O40]6– and HPO2- 4 anions additionally contain MgWO4 and Mg3(PO4)2 phases, respectively. The OH groups of the materials examined do not show pronounced Brønsted acidity. (NH4)2HPO4 introduced into the interlayer space of the Mg–Al hydroxide is the most effective modifier enhancing the surface acidity, while the highest basicity is attained by introducing the Na2WO4 modifier. Glycerol dehydration at 275–350°C, involving acid sites of the surface, yields a wide variety of products containing 2 to 12 carbon atoms per molecule. A correlation has been established between the amount of glycerol dehydration products (acrolein + acetol) and the number of strong Lewis acid sites (νCO = 2177–2195 cm–1). The presence of basic sites varying in strength and concentration on the catalyst surface is favorable for condensation, cyclization, and oligomerization reactions yielding a wide range of C4+ products.
Библиографическая ссылка: Korneeva E.V. , Ivanova A.S. , Bondareva V.M. , Plyasova L.M. , Glazneva T.S.
Structural, Textural, and Acid–Base Properties of Layered Mg–Al Oxides Modified with a Tungstate or Phosphate and Their Activity and Selectivity in Gas-Phase Glycerol Dehydration
Kinetics and Catalysis. 2015. V.56. N5. P.605-616. DOI: 10.1134/S0023158415050109 WOS Scopus РИНЦ CAPlusCA OpenAlex
Оригинальная: Корнеева Е.В. , Иванова А.С. , Бондарева В.М. , Плясова Л.М. , Глазнева Т.С.
Структурные, текстурные и кислотно-основные свойства слоистых Mg–Al-оксидов, модифицированных вольфраматами/фосфатами, и их активность и селективность в газофазной дегидратации глицерина
Кинетика и катализ. 2015. Т.56. №5. С.614-625. DOI: 10.7868/S045388111505010X РИНЦ OpenAlex
Даты:
Поступила в редакцию: 4 авг. 2014 г.
Опубликована в печати: 1 сент. 2015 г.
Опубликована online: 23 сент. 2015 г.
Идентификаторы БД:
Web of science: WOS:000361757300007
Scopus: 2-s2.0-84942577412
РИНЦ: 24953390
Chemical Abstracts: 2015:1541507
Chemical Abstracts (print): 170:319847
OpenAlex: W2217814026
Цитирование в БД:
БД Цитирований
Web of science 4
Scopus 5
РИНЦ 5
OpenAlex 5
Альметрики: