Open AccessReaction of ethylene over a typical Fischer‐Tropsch synthesis Co/ TiO 2 catalyst
Author(s) -
Zhang Yusheng,
Tshwaku Mgcini,
Yao Yali,
Chang Jianli,
Lu Xiaojun,
Liu Xinying,
Hildebrandt Diane
Publication year - 2020
Publication title -
engineering reports
Language(s) - English
Resource type - Journals
ISSN - 2577-8196
DOI - 10.1002/eng2.12232
Subject(s) - fischer–tropsch process , hydrogenolysis , chemistry , catalysis , product distribution , ethylene , monomer , decomposition , selectivity , order of reaction , polymerization , organic chemistry , polymer , reaction rate constant , kinetics , physics , quantum mechanics
In order to identify the potential reaction paths of C 2 H 4 and their product distribution in Fischer‐Tropsch synthesis (FTS), a series of experiments were designed over a Co/TiO 2 catalyst in the absence of CO. C 2 H 4 did quickly react with H 2 to produce C 1‐6 products under Fischer‐Tropsch (FT) reaction conditions. Although the dominant reaction is C 2 H 4 hydrogenation to ethane, changing the reaction conditions (temperature and partial pressure of reactants) can lead to the other reaction pathways being enhanced, resulting in varying product selectivity to both linear and branch olefins and paraffins. Possible reaction pathways had been summarized and discussed, which including C 2 H 4 reaction to ethylidene followed by dimerization; C 2 H 4 insertion into C 2 surface species and dimerization and C 4 decomposition and/or direct C 2 hydrogenolysis. Furthermore, the products obtained from C 2 H 4 reactions were fit to a typical FTS product distribution, which indicate that both the chain growth initiators and monomers are not necessarily only derived from hydrogenation of CO but also from the secondary reactions of olefins.