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Catalytic conversion of linalool on micro-mesoporous BEA-type zeoliteстатья
- Авторы: Tsitsishvili V., Ramishvili T., Ivanova I., Dobryakova I., Kokiashvili N., Bukia T., Kurtsikidze G.
- Журнал: Bulletin of the Georgian National Academy of Sciences
- Том: 11
- Номер: 3
- Год издания: 2017
- Первая страница: 79
- Последняя страница: 87
- Аннотация: ABSTRACT. The catalytic conversion of the tertiary terpenic alcohol linalool (C10H18O) on samples of the beta type microporous zeolites (BEA-25 and BEA-150 with n(SiO2 )/n(Al2O3 ) equal to 25 and 150) and on their modified micro-mesoporous forms (RBEA-25 and RBEA-150 with n(SiO2 )/n(Al2O3 ) equal to 23.8 and 176.4, and transport mesopores with pore diameters 3.5 and 3.8 nm, respectively)was studied. The micro-mesoporous materials were synthesized by recrystallization of initial commercial BEAzeolites in NaOH aqueous solutions. The chemical composition of the catalysts was determined using X-ray fluorescence analysis. The micro- and mesopores volumes and specific surface areas of catalysts were defined by nitrogen adsorption-desorption. The acid properties of catalysts were estimated using temperature-programmed desorption of ammonia. The catalytic conversion of linalool was carried out in a static system in the liquid phase. The analysis of products of catalytic reactions was carried out by the GC-MS. The reactions of isomerization, dehydration, cyclization and condensation of linalool take placeon the studied micro- and micro-mesoporous zeolites by the conversion of linalool in an atmosphere of nitrogen or argon in a liquid phase at 60–170 °C. The conversion of linalool (4-40%) and the selectivity (45-12 %) of the formation of nerol and geraniol as products of linalool isomerization are low.The introduction of mesopores in the microporous BEA-type zeolite catalysts leads to a significant increase in conversion of linalool and a slight growth in selectivity towards nerol and geraniol. Comparatively high amount of weak acid sites in microporous BEA zeolites contributes to enlarge in selectivity. ©2017 Bull. Georg. Natl. Acad. Sci.
- Добавил в систему: Добрякова Ирина Вячеславовна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Catal_Conv_Linalool__2017_Moambe.pdf | 275,6 КБ | 26 октября 2017 [IVDobryakova] |