Deactivation kinetics of individual C6-C9 aromatics' generation from methanol over Zn and P co-modified HZSM-5.
RSC Adv
; 9(39): 22327-22335, 2019 Jul 17.
Article
em En
| MEDLINE
| ID: mdl-35519453
ABSTRACT
A deactivation kinetic model has been determined for the methanol to aromatic process over a HZSM-5 zeolite catalyst (SiO2/Al2O3 = 30) modified by 1.0 wt% ZnO and 2.0 wt% P, in which the generation rates of C6-C9 aromatics are treated individually while olefins and paraffins are lumped as intermediate and byproduct, respectively. The time-dependent catalytic activity is described by a deactivation coefficient related to the concentration of both methanol and products. The established kinetic model is able to predict the product distribution along with on-stream time under various conditions and is identified to be valid by a model significance test. The effect of operating conditions on catalyst behavior was also investigated deactivation rate increases dramatically with methanol partial pressure and temperature; higher feed methanol content leads to less aromatics and more paraffin; increasing temperature reduces paraffin generation and results in higher aromatic yield, especially benzene and toluene.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
RSC Adv
Ano de publicação:
2019
Tipo de documento:
Article