| Titre : | Gas-phase catalytic hydrochlorination of acetylene in a two-stage fluidized-bed reactor (2009) |
| Auteurs : | Xiaobo Wei, Éditeur scientifique ; Haibo Shi, Éditeur scientifique ; Weizhong Qian, Éditeur scientifique |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N°1, Janvier 2009) |
| Article en page(s) : | p. 128-133 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | 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 |
