Model of an industrial multitubular reactor for methanol to formaldehyde oxidation in the presence of catalyst deactivation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019-02-23

Autores

Catarina G. Braz (Autor) Outra; Adélio Mendes (Autor) FEUP; Jorge Rocha (Autor) Outra; Ricardo Alvim (Autor) Outra; Henrique A. Matos (Autor) Outra

Revista

Título: Chemical Engineering Science

Vol. 195

Páginas: 347-355

ISSN: 0009-2509

Editora: Elsevier

Indexação

ISI Web of Knowledge - 1 Citação

ISI Web of Science

Scopus - 9 Citações

Outras Informações

ID Authenticus: P-00P-QTM

DOI: 10.1016/j.ces.2018.09.033

Abstract (EN): In the present work, a first-principles model of methanol partial oxidation to formaldehyde in an industrial reactor was developed and the reaction kinetic and deactivation parameters estimated, taking advantage of the temperature profile established by the exothermic reaction. The catalyst deactivation was assigned primarily to hot-spot regions in the oxidation reactor. The exposure to high temperatures enhances solid-state reactions that produce volatile compounds and a consequential loss of catalyst active compounds that migrate downstream from the hot-spot. This phenomenon was modelled implementing a new method where, instead of time, the deactivation was integrated as a function of the total consumed reagent until the instant of interest. This approach allowed computing the activity of the catalyst at any instant without needing to solve the model for the whole operating history until the pertinent instant; for simulating industrial reactors, where the operating conditions are changing frequently, this feature is quite relevant.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9