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Gas-phase catalytic hydrochlorination of acetylene in a two-stage fluidized-bed reactor / Xiaobo Wei in Industrial & engineering chemistry research, Vol. 48 N°1 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - p. 128-133 Titre : Gas-phase catalytic hydrochlorination of acetylene in a two-stage fluidized-bed reactor Type de document : texte imprimé Auteurs : Xiaobo Wei, Editeur scientifique ; Haibo Shi, Editeur scientifique ; Weizhong Qian, Editeur scientifique Année de publication : 2009 Article en page(s) : p. 128-133 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Gas-Phase  Catalytic  Vinyl  chloride  Industrial  catalyst Résumé : Production of vinyl chloride monomer (VCM) by the hydrochlorination of acetylene with HCl was investigated in both a single-stage fluidized bed (SSFB) and a two-stage fluidized bed (TSFB) at different reaction temperatures and space velocities of acetylene. The conversion of acetylene increases with increasing temperature and decreases with increasing space velocity. Over a wide range of operating conditions, a higher conversion of acetylene was achieved in the TSFB than in the SSFB, with the selectivity of VCM being almost 100%. This process can be described by a two-dimensional dispersion and reaction model. A new catalyst, HgCl2 supported on a coconut-shell-type activated carbon, which has a much higher mechanical strength than the industrial catalyst (HgCl2 supported on a coal-based activated carbon), was employed in the fluidized beds. Evaluation of the catalyst lifetime in a fast sublimation experiment at high temperature showed that the new catalyst has a longer lifetime than the industrial catalyst. The novel TSFB technology, combined with the new catalyst, is effective in providing a higher throughput and quality of the VCM product than the conventional PB reactor. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0716316 [article] Gas-phase catalytic hydrochlorination of acetylene in a two-stage fluidized-bed reactor [texte imprimé] / Xiaobo Wei, Editeur scientifique ; Haibo Shi, Editeur scientifique ; Weizhong Qian, Editeur scientifique . - 2009 . - p. 128-133. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - p. 128-133 Mots-clés : Gas-Phase  Catalytic  Vinyl  chloride  Industrial  catalyst Résumé : Production of vinyl chloride monomer (VCM) by the hydrochlorination of acetylene with HCl was investigated in both a single-stage fluidized bed (SSFB) and a two-stage fluidized bed (TSFB) at different reaction temperatures and space velocities of acetylene. The conversion of acetylene increases with increasing temperature and decreases with increasing space velocity. Over a wide range of operating conditions, a higher conversion of acetylene was achieved in the TSFB than in the SSFB, with the selectivity of VCM being almost 100%. This process can be described by a two-dimensional dispersion and reaction model. A new catalyst, HgCl2 supported on a coconut-shell-type activated carbon, which has a much higher mechanical strength than the industrial catalyst (HgCl2 supported on a coal-based activated carbon), was employed in the fluidized beds. Evaluation of the catalyst lifetime in a fast sublimation experiment at high temperature showed that the new catalyst has a longer lifetime than the industrial catalyst. The novel TSFB technology, combined with the new catalyst, is effective in providing a higher throughput and quality of the VCM product than the conventional PB reactor. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0716316