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Remarkable increasing of ZSM-5 lifetime in methanol to hydrocarbon reaction by post engineering in fluoride media

Paper ID Volume ID Publish Year Pages File Format Full-Text
38879 45795 2016 8 PDF Available
Title
Remarkable increasing of ZSM-5 lifetime in methanol to hydrocarbon reaction by post engineering in fluoride media
Abstract

•Fe/ZSM-5 prepared by post-modification in fluoride media.•Fe/ZSM-5 can increase the ZSM-5 lifetime by a factor of 10.•Study lifetime improvement by characterization and model catalysts evaluation.•Post-modification selective remove Lewis acidity and internal hydroxyl group.

Long lived methanol to hydrocarbon (MTH) catalyst was obtained by the post-engineering of ZSM-5 in FeF3/NH4HF2 media. Optimized Fe/ZSM-5 preparation can increase the lifetime of ZSM-5 by a factor of 10 under investigated conditions. The modified catalysts were subjected to detailed characterization including XRD, FT-IR, nitrogen adsorption, NH3-TPD and Mössbauer spectroscopy analyses to explore the performance improvement mechanism. The characterization results indicate the post-engineering step selectively diminishing Lewis acidity and internal hydroxyl produced by defect sites without extensively removing Al from ZSM-5 lattice as well as nano-sized FexOy entrapping in zeolite. The synergic effect of these modifications resulted in the reduction of coke species accumulation rate in zeolite and consequently long catalyst lifetime. The simple and effective nature of such post-engineering method make it become an interesting method for MTH reaction especially when combined with the fluoride processing infrastructure in existed fluoride industry.

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Keywords
Zeolite; Post-treatment; Methanol to hydrocarbon; Catalyst lifetime; Fluoride; Mossbauer spectroscopy
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Remarkable increasing of ZSM-5 lifetime in methanol to hydrocarbon reaction by post engineering in fluoride media
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 512, 25 February 2016, Pages 1–8
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us