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The effect of Fe, P and Si/Al molar ratio on stability of HZSM-5 catalyst in naphtha thermal-catalytic cracking to light olefins

Paper ID Volume ID Publish Year Pages File Format Full-Text
49981 46775 2012 5 PDF Available
Title
The effect of Fe, P and Si/Al molar ratio on stability of HZSM-5 catalyst in naphtha thermal-catalytic cracking to light olefins
Abstract

To investigate the effect of Si/Al ratio, Fe and P loadings on the stability of HZSM-5 in the catalytic cracking of naphtha, experimental tests were done over 20 h time on stream on modified HZSM-5 with different Si/Al molar ratios. NH3-TPD and TPO analyses showed that the more number of weak acid sites, the greater amount of coke is formed. According to TPO and XRD results, it was demonstrated that dealumination had a significant role in catalytic stability. Among catalysts, Fe(6)-P(2)/HZSM-5(25) showed the highest catalytic stability (1.86 wt.% propylene reduction).

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► HZSM-5 with lowest Si/Al ratio, moderate Fe and highest P shows highest stability. ► Framework Al can be stabilized by suitable amount of P by considering Si/Al ratio. ► Weak acidity leads to coke formation while strong acidity leads to propylene yield.

Keywords
Thermal catalytic cracking; Modified HZSM-5; Light olefin; Stability
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The effect of Fe, P and Si/Al molar ratio on stability of HZSM-5 catalyst in naphtha thermal-catalytic cracking to light olefins
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 27, 5 October 2012, Pages 114–118
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
Online Support
Any Questions? feel free to contact us