Effect of Bifunctional Pt-Containing Al۲O۳-FeY Nanocatalysts on Ethylbenzene Transformation
محل انتشار: مجله علوم و فن آوری نفت، دوره: 11، شماره: 2
سال انتشار: 1400
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 65
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شناسه ملی سند علمی:
JR_JPSTR-11-2_001
تاریخ نمایه سازی: 30 آذر 1402
چکیده مقاله:
Transformation of ethylbenzene can provide valuable isomers as a raw material for the petrochemical industry. This work explored the transformation of ethylbenzene (EB) over nanozeolite Y with the Si/Al ratio of ۵. Fe ion exchange was carried out to modify the acidity of zeolites. The influence of platinum was investigated by the introduction of Pt-Al۲O۳. XRD, SEM, ICP, BET, FTIR, ۲۷Al MAS NMR, NH۳-TPD, and TG tests were applied for the characterization of physicochemical properties of prepared nanocatalysts. The slight decrease in the surface area of synthesized Fe-Y nanocatalysts indicated that the major part of iron was deposited in the catalyst structure. The addition of iron to the nanocatalyst structure resulted in increased strong acid sites and decreased weak acid sites. Reduction in weak acidity led to a lower coke formation rate and higher stability of FeY nanocatalysts. Results illustrated that the intensity of Lewis acidity decreased for all prepared nanocatalysts by increasing the iron content while the number of Bronsted acid sites increased. The addition of platinum-Al۲O۳ to the FeY nanocatalysts illustrated higher EB conversion and the same catalyst stability as FeY nanocatalysts. Nanozeolite Pt/Fe-Y composed of ۰.۱ wt.% platinum and ۱.۰ wt.% iron was obtained to be effective catalyst for EB transformation reaction. The prepared catalyst indicated adequate degree of EB conversion (۶۱%) as well as ۷۷.۲% EB isomerization, ۳.۳% EB disproportionation, ۱.۴% EB dealkylation, ۳.۱% EB cracking, ۱۴.۸% EB hydrogenation and ۰.۲% EB transalkylation.
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نویسندگان
milad rasouli
Department of Petrochemical, Iran Polymer and Petrochemical Institute, (IPPI) Tehran, Iran
nakisa yaghobi
Department of Petrochemical, Iran Polymer and Petrochemical Institute, (IPPI) Tehran, Iran
Masoud Rasouli
School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
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