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Hydroprocessing catalysts regeneration and recycling

Paper ID Volume ID Publish Year Pages File Format Full-Text
43916 45995 2007 9 PDF Available
Title
Hydroprocessing catalysts regeneration and recycling
Abstract

The three typical causes of deactivation of hydroprocessing catalysts are coke, sintering and contamination. The two first can be eliminated by regeneration, the ex situ method being the rule nowadays for a better performance recovery. Regeneration consists in a controlled oxidation which eliminates coke and converts sulfides back to oxides. The main limits to catalyst reuse are the decrease of activity and mechanical properties. Non-contaminated regenerated catalysts can recover activities rather similar to fresh ones, as assessed by a statistical study performed at Eurecat on CoMo catalysts. Nevertheless some new generation catalysts require additional treatments to recover full activity. The handling and transport of spent catalysts to an off-site regeneration facility is currently performed, but requires some precaution as the material is classified as self-heating. At the end of the cycle, spent non-reusable catalysts have to be recycled for metals reclamation. This can be performed either by hydrometallurgical or pyrometallurgical routes.

Keywords
Spent catalyst; Deactivation; Regeneration; Recycling; Hydroprocessing; Reactivation; Hydrotreating; Contamination
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Hydroprocessing catalysts regeneration and recycling
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 322, 16 April 2007, Pages 67–75
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
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