Methylpyrazine Ammoxidation over Binary Oxide Systems: V. Effect of Phosphorus Additives on the Physicochemical and Catalytic Properties of a Vanadium-Titanium Catalyst in Methylpyrazine Ammoxidation Научная публикация
| Журнал |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Вых. Данные | Год: 2004, Том: 45, Номер: 1, Страницы: 104-113 Страниц : 10 DOI: 10.1023/B:KICA.0000016110.21537.0a | ||
| Ключевые слова | Vanadium; Catalytic Property; Pyrazine; Carbon Oxide; Oxide Vanadium | ||
| Авторы |
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| Организации |
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Информация о финансировании (2)
| 1 | Российский фонд фундаментальных исследований | 01-03-32364 |
| 2 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 04522 WK |
Реферат:
Oxide vanadium–titanium catalysts modified by phosphorus additives (20V2O5–(80 –n)TiO2–nP2O5, n = 1, 3, 5, 10, and 15 wt %) are studied in methylpyrazine ammoxidation. Two regions of compositions are found corresponding to radically different catalytic properties, namely, catalysts with a low (≤5 wt % P2O5) and high (≥10 wt % P2O5) concentration of the additive. In the first case, the introduction of phosphorus is accompanied by a gradual increase in the activity. In the second case, an increase in the additive concentration results in a decrease in the activity and selectivity to the target product, pyrazineamide, and a simultaneous increase in the selectivities to by-products, pyrazine and carbon oxides. The catalysts are characterized by X-ray diffraction analysis, differential dissolution, IR, and NMR spectroscopic data. As in the binary system, the active sites of the samples with a low concentration of phosphorus contain V5+ cations in a strongly distorted octahedral oxygen environment, which are strongly bound to a support due to the formation of V–O–Ti bonds. The catalytic properties of the samples containing ≥10 wt % P2O5 are due to the presence of the phase of a triple V–P–Ti compound with an atomic ratio V : P : Ti approximately equal to 1 : 1 : 1. The V5+ cations in this compound occur in a weakly distorted tetrahedral oxygen environment and are bound to the tetrahedral P5+ cations.
Библиографическая ссылка:
Bondareva V.M.
, Andrushkevich T.V.
, Lapina O.B.
, Khabibulin D.F.
, Vlasov A.A.
, Dovlitova L.S.
, Burgina E.B.
Methylpyrazine Ammoxidation over Binary Oxide Systems: V. Effect of Phosphorus Additives on the Physicochemical and Catalytic Properties of a Vanadium-Titanium Catalyst in Methylpyrazine Ammoxidation
Kinetics and Catalysis. 2004. V.45. N1. P.104-113. DOI: 10.1023/B:KICA.0000016110.21537.0a WOS Scopus РИНЦ CAPlusCA OpenAlex
Methylpyrazine Ammoxidation over Binary Oxide Systems: V. Effect of Phosphorus Additives on the Physicochemical and Catalytic Properties of a Vanadium-Titanium Catalyst in Methylpyrazine Ammoxidation
Kinetics and Catalysis. 2004. V.45. N1. P.104-113. DOI: 10.1023/B:KICA.0000016110.21537.0a WOS Scopus РИНЦ CAPlusCA OpenAlex
Оригинальная:
Бондарева В.М.
, Андрушкевич Т.В.
, Лапина О.Б.
, Хабибулин Д.Ф.
, Власов А.А.
, Довлитова Л.С.
, Бургина Е.Б.
Окислительный аммонолиз метилпиразина на бинарных оксидных системах. V. Влияние добавок фосфора на физико-химические и каталитические свойства ванадийтитанового катализатора
Кинетика и катализ. 2004. Т.45. №1. С.115-125. РИНЦ
Окислительный аммонолиз метилпиразина на бинарных оксидных системах. V. Влияние добавок фосфора на физико-химические и каталитические свойства ванадийтитанового катализатора
Кинетика и катализ. 2004. Т.45. №1. С.115-125. РИНЦ
Даты:
| Поступила в редакцию: | 21 июн. 2002 г. |
| Опубликована в печати: | 1 янв. 2004 г. |
Идентификаторы БД:
| Web of science: | WOS:000220015800008 |
| Scopus: | 2-s2.0-1542619630 |
| РИНЦ: | 13451745 |
| Chemical Abstracts: | 2004:122273 |
| Chemical Abstracts (print): | 141:8824 |
| OpenAlex: | W2095166601 |