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 Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2015, Volume: 56, Number: 5, Pages: 605-616 Pages count : 12 DOI: 10.1134/S0023158415050109 | ||||
| Tags | acidity, basicity, dehydration, glycerol, interlayer anion, layered double hydroxides, magnesium oxide, spinel | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | The Ministry of Education and Science of the Russian Federation | |
| 2 | Novosibirsk National Research University |
Abstract:
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.
Cite:
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 ANCAN OpenAlex
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 ANCAN OpenAlex
Original:
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
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
Dates:
| Submitted: | Aug 4, 2014 |
| Published print: | Sep 1, 2015 |
| Published online: | Sep 23, 2015 |
Identifiers:
| Web of science: | WOS:000361757300007 |
| Scopus: | 2-s2.0-84942577412 |
| Elibrary: | 24953390 |
| Chemical Abstracts: | 2015:1541507 |
| Chemical Abstracts (print): | 170:319847 |
| OpenAlex: | W2217814026 |