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On-stream stability enhancement of HZSM-5 based fluid catalytic cracking naphtha hydro-upgrading catalyst via magnesium modification

Paper ID Volume ID Publish Year Pages File Format Full-Text
49687 46760 2016 4 PDF Available
Title
On-stream stability enhancement of HZSM-5 based fluid catalytic cracking naphtha hydro-upgrading catalyst via magnesium modification
Abstract

•Increasing MgO loading leads to the increased ratio of Lewis acid sites to Brönsted ones.•The suitable ratio of medium and strong Lewis acid sites to medium and strong Brönsted ones is about 1.•The suitable optimum ratio of total Lewis acid sites to total Brönsted ones is 2–3.•Formation of coke with lower H/C ratio is the main factor accounting for catalyst deactivation.

On-stream stability of fluid catalytic cracking (FCC) naphtha hydro-upgrading catalysts that convert olefins into high-octane isoparaffins and aromatics is crucial for guaranteeing the long-term operation of industrial units, and therefore suppressing catalyst deactivation due to coking becomes the focus of FCC naphtha hydro-upgrading process and catalyst development. Here we report a simple and novel strategy to enhance the on-stream stability of a HZSM-5 based FCC naphtha hydro-upgrading catalyst by magnesium modification. The characterization and catalytic test results showed that the incorporation of a suitable amount of MgO can adjust the ratio of Lewis acid sites to Brönsted ones and thereby significantly improve stability of the resulting catalyst.

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Keywords
HZSM-5 zeolite; Mg modification; Acidity; FCC naphtha; Deactivation
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On-stream stability enhancement of HZSM-5 based fluid catalytic cracking naphtha hydro-upgrading catalyst via magnesium modification
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 83, 5 August 2016, Pages 31–34
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