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Coking behavior of a submicron MFI catalyst during ethanol dehydration to ethylene in a pilot-scale fixed-bed reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
41753 45899 2011 10 PDF Available
Title
Coking behavior of a submicron MFI catalyst during ethanol dehydration to ethylene in a pilot-scale fixed-bed reactor
Abstract

Coking behavior of a submicron MFI catalyst for ethanol to ethylene was studied in a pilot scale tubular reactor. The experimental results showed that the submicron MFI catalysts possessed high activity and stability. Ethanol conversion and ethylene selectivity over the fresh/regenerated catalyst were around 97.9%/96.2% and 99.1%/98.9%, respectively. The fresh catalyst illustrated an active duration of 1606 h while the regenerated of 2008 h, which implied the regeneration can enhance the stability. In the reactor, the coke mainly consisted of adsorbed substances at the forepart and of alkyl aromatics at the end, and the coke contents presented an approximate U-shape trend along the tube length. Further tests revealed that the loss of acidity rather than the pore volume should be responsible for the catalyst deactivation.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (108 K)Download as PowerPoint slideResearch highlights▶ Submicron MFI catalyst possessed high activity, stability and regenerability. ▶ Coke deposits change from intermediates to alkyl aromatics along the tube length. ▶ Loss of acidity rather than pore volume should be responsible for deactivation.

Keywords
Ethanol dehydration; Submicron MFI zeolite; Coke deposition; Pilot plant
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Coking behavior of a submicron MFI catalyst during ethanol dehydration to ethylene in a pilot-scale fixed-bed reactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 393, Issues 1–2, 15 February 2011, Pages 161–170
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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