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Nitrogen-Doped Carbon-Assisted One-pot Tandem Reaction for Vinyl Chloride Production via Ethylene Oxychlorination |
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| Authors: | Hongfei Ma Dr Guoyan Ma Dr Yanying Qi Dr Yalan Wang Dr Qingjun Chen Dr Kumar R Rout Terje Fuglerud Prof Dr De Chen |
| Institution: | 1. Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), Sem sælands vei 4, 7491 Trondheim, Norway;2. College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an, 710065 Shaanxi, China
Shaanxi Key Laboratory of Carbon Dioxide Sequestration and Enhanced Oil Recovery (under planning), Xi'an, 710065 Shaanxi, China;3. Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), Sem sælands vei 4, 7491 Trondheim, Norway Sintef Industry, Sem sælands vei 2A, 7491 Trondheim, Norway;4. INOVYN, Herøya Industrial Park, 3936 Porsgrunn, Norway |
| Abstract: | A bifunctional catalyst comprising CuCl2/Al2O3 and nitrogen-doped carbon was developed for an efficient one-pot ethylene oxychlorination process to produce vinyl chloride monomer (VCM) up to 76 % yield at 250 °C and under ambient pressure, which is higher than the conventional industrial two-step process (≈50 %) in a single pass. In the second bed, active sites containing N-functional groups on the metal-free N-doped carbon catalyzed both ethylene oxychlorination and ethylene dichloride (EDC) dehydrochlorination under the mild conditions. Benefitting from the bifunctionality of the N-doped carbon, VCM formation was intensified by the surface Cl*-looping of EDC dehydrochlorination and ethylene oxychlorination. Both reactions were enhanced by in situ consumption of surface Cl* by oxychlorination, in which Cl* was generated by EDC dehydrochlorination. This work offers a promising alternative pathway to VCM production via ethylene oxychlorination at mild conditions through a single pass reactor. |
| Keywords: | carbon dehydrochlorination industrial chemistry oxychlorination vinyl chloride |