Investigation of deactivation of Cr- ZSM-5 zeolite during catalytic oxidation of ethyl Acetate in a fixed bed reactor

Author/Authors

Aligoli ،Niaei Department of Applied Chemistry and Chemical Engineering - Faculty of Chemistry - University of Tabriz, Tabriz, Iran , Darush ،salari Department of Applied Chemistry and Chemical Engineering - Faculty of Chemistry - University of Tabriz, Tabriz, Iran , Azadeh ،jodaei Department of Applied Chemistry and Chemical Engineering - Faculty of Chemistry - University of Tabriz, Tabriz, Iran , Nayimeh ،Nikniaz Department of Applied Chemistry and Chemical Engineering - Faculty of Chemistry - University of Tabriz, Tabriz, Iran

كليدواژه

Cr-ZSM-5 , regeneration , deactivation , catalytic oxidation

سال انتشار

1388

عنوان كنفرانس

ششمين كنگره بين المللي مهندسي شيمي

زبان مدرك

انگليسي

چكيده فارسي

فاقد چكيده

چكيده لاتين

Cr-modified ZSM-5 zeolites (Si/Al = 14) were prepared by adopting the liquid ion-exchange method with nitrate chrome as Cr precursor and their catalytic performance and deactivation behavior was studied in the oxidation of ethyl acetate. Furthermore, the catalyst has been regenerated several times and showed good regeneration performance. During the oxidation process, the catalytic activity decreases, some of the catalyst pores are blocked and the acid centers are partly covered by coke deposition. The coked versus fresh catalysts have been characterized by XRD, FT-IR and SEM to reveal that the structure of the Cr-ZSM-5 catalyst was unaffected by coke deposition.

كشور

ايران

تعداد صفحه 2

4

از صفحه

1

تا صفحه

4