Simplified Treatment of Mass Transfer for Gas-Phase Hydrogenation/Dehydrogenation of Heavy Compounds Научная публикация
| Журнал |
Korean Journal of Chemical Engineering
ISSN: 0256-1115 , E-ISSN: 1975-7220 |
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| Вых. Данные | Год: 2002, Том: 19, Номер: 2, Страницы: 252-260 Страниц : 9 DOI: 10.1007/BF02698410 | ||||
| Ключевые слова | Flow-Catalyst Pellet Temperature Rise, Gas Phase Benzene Hydrogenation, Internal and Interphase Mass and Heat Transfer, Multicomponent and Binary Diffusion | ||||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Netherlands Organisation for Scientific Research |
Реферат:
Using single catalyst pellets (5 mm) 15% Ptγ–Al2O3, we experimentally studied gas-phase benzene hydrogenation at normal pressure by thermocouple measurements of gas flow and the pellet center. Temperature of gas flow was varied in the range of 20 °С / 350 °С for three molar fractions of benzene vapor (0.1, 0.2, and 0.3) mixed with hydrogen. The ignition/extinction behavior of the flow-pellet temperature rise (maximum values up to 100 °С/ 200 °С) is explained by internal-external mass transport limitations of the reaction rate and reaction reversibility at high pellet temperature. A simplified pseudobinary treatment of both multicomponent intrapellet mass transfer (in bimodal porous media) and multicomponent external mass transfer (under forced convection) is proposed on the basis of the analytical estimation. The validity of the suggested approach is confirmed by comparing the experimental data for benzene hydrogenation with rigorous (multicomponent) and approximated (pseudobinary) calculations obtained by using a mathematical model of a spherically symmetric pellet. The simplified approach appears to be quite accurate for reactions A+nH2=B of hydrogenation (n>0) or dehydrogenation (n<0) of sufficiently heavy compounds, i.e. if DAH≈DBH>>DAB.
Библиографическая ссылка:
Shigarov A.B.
, Fadeev S.I.
, Mikhailova I.A.
, Kulikov A.V.
, Korolev V.K.
, Kuzin N.A.
, Kirillov V.A.
Simplified Treatment of Mass Transfer for Gas-Phase Hydrogenation/Dehydrogenation of Heavy Compounds
Korean Journal of Chemical Engineering. 2002. V.19. N2. P.252-260. DOI: 10.1007/BF02698410 WOS Scopus РИНЦ CAPlusCA OpenAlex
Simplified Treatment of Mass Transfer for Gas-Phase Hydrogenation/Dehydrogenation of Heavy Compounds
Korean Journal of Chemical Engineering. 2002. V.19. N2. P.252-260. DOI: 10.1007/BF02698410 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 28 июл. 2001 г. |
| Принята к публикации: | 24 сент. 2001 г. |
| Опубликована в печати: | 1 мар. 2002 г. |
Идентификаторы БД:
| Web of science: | WOS:000174787800009 |
| Scopus: | 2-s2.0-0036275953 |
| РИНЦ: | 13410207 |
| Chemical Abstracts: | 2002:390159 |
| Chemical Abstracts (print): | 137:126779 |
| OpenAlex: | W2106550399 |