Selective kinetic deactivation model for methanol synthesis from simultaneous reaction of CO2 and CO with H2 on a commercial copper/zinc oxide catalyst
✍ Scribed by Mohammad Reza Rahimpour; Jamshid Fathikalajahi; Abdolhosein Jahanmiri
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 850 KB
- Volume
- 76
- Category
- Article
- ISSN
- 0008-4034
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✦ Synopsis
A kinetic model for the deactivation of copper/zinc oxide catalyst during the methanol synthesis has been developed. This model is of the Langmuir-Hinshelwood-Hougen-Watson type and considers two types of active sites for the deactivation of catalyst. One of the site types on copper is allocated for the deactivation of the catalyst due to carbon dioxide while another type is assigned for the deactivation of the catalyst due to carbon monoxide. The parameters of the deactivation rate equations based on the above concept have been determined using the experimental data of Hoffmann (1993). The validity of the deactivation model has been checked by comparing the results predicted by the model with experimental data different than of those used to evaluate the parameters of the model. The good agreement that noticed in this comparison confirmed the idea that CO and CO, are responsible at different extent for the deactivation of CdZnO catalyst during methanol synthesis.
On a mis au point un modele cinetique pour la desactivation d'un catalyseur d'oxyde de cuivre/zinc lors de la synthese du methanol. Ce modele est de type Langmuir-Hinshelwood-Hougen-Watson et considere deux types de sites actifs pour la desactivation du catalyseur. Un type de site sur du cuivre est reserve a la desactivation du catalyseur par le gaz carbonique, tandis que le deuxieme est assigne a la desactivation du catalyseur par le monoxyde de carbone. Les parametres des equations de vitesse de desactivation bases sur le concept ci-dessus, ont ete determines a l'aide des donnees experimentales de Hoffmann (1993). On a verifie la validite du modele de desactivation en comparant les resultats predits par le modele a des donnees experimentales differentes de celles ayant semi a evaluer les parametres du modele. Le bon accord trouve dans cette comparaison confirme I'idee que le CO et le CO, sont responsables a differents degres