Mechanisms of coke growth on mordenite zeolite
| Autor: | Mehrad Tarighi, Ahcène Soualah, Ludovic Pinard, N. Chaouati, Mohamed Chater |
|---|---|
| Přispěvatelé: | USTO MB, Lab Physicochim Mat, Dept Chim, Oran, Algeria, Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010405 organic chemistry
Chemistry Condensation technology industry and agriculture Aromatization Coke [CHIM.CATA]Chemical Sciences/Catalysis 010402 general chemistry complex mixtures 01 natural sciences Catalysis Mordenite respiratory tract diseases 0104 chemical sciences Propene chemistry.chemical_compound Chemical engineering Organic chemistry Physical and Theoretical Chemistry Zeolite Chemical composition ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Chinese Journal of Catalysis Chinese Journal of Catalysis, Elsevier, 2016, 344, pp.354-364. ⟨10.1016/j.jcat.2016.10.011⟩ |
| ISSN: | 1872-2067 |
| Popis: | Mechanisms of coke formation and growth transformation on MOR zeolite were investigated using a microbalance at 623 K for two propene pressures: 0.1 and 1 bar. The low and high coking pressures correspond to laboratory and industrial conditions, respectively. Initial coke deposition is faster at high pressure, but the maximum uptake is higher at low pressure. The complete determination of chemical composition of coke has required the use of a lot of techniques (IRFT, GC–MS, MALDI-TOF). From the change of chemical composition of coke, it can be proposed by different mechanisms of growth of coke molecules trapped in the zeolite micropores. The coke grows under industrial conditions (high olefins pressure) by successive alkylation/cyclization/aromatization reactions, while under laboratory conditions (low olefins pressure) the growth proceeds preferentially by condensation of coke molecules. |
| Databáze: | OpenAIRE |
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