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Naphthenic acid removal from heavy oils on alkaline earth-metal oxides and ZnO catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42394 45923 2009 10 PDF Available
Title
Naphthenic acid removal from heavy oils on alkaline earth-metal oxides and ZnO catalysts
Abstract

Naphthenic acid removal from bitumen-derived HVGO by thermal cracking and catalytic decarboxylation was investigated over alkaline earth-metal oxides and ZnO catalysts in a batch reactor and a continuous fixed-bed reactor. The fresh and spent catalysts were characterized by XRD, TG-DTA, CO2-TPD, and SEM. With MgO and ZnO, naphthenic acid removal proceeds mainly via catalytic decarboxylation, and no crystalline phase changes are observed after reaction. With CaO, multiple pathways (catalytic decarboxylation, neutralization, and thermal cracking) were responsible for naphthenic acid conversion. Ca(OH)2 and CaCO3 were identified in the spent catalysts. With BaO, naphthenic acid conversion is mainly through neutralization. All BaO is converted to Ba(OH)2 during the reaction.

Graphical abstractNaphthenic acid removal from bitumen-derived HVGO by thermal cracking and catalytic decarboxylation was investigated. With MgO and ZnO, naphthenic acid removal proceeds mainly via catalytic decarboxylation. With CaO, multiple pathways were responsible for naphthenic acid conversion. With BaO, naphthenic acid conversion is mainly through neutralization. All BaO is converted to Ba(OH)2 during the reaction.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Naphthenic acids; Catalytic decarboxylation; Catalysts; Removal
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Naphthenic acid removal from heavy oils on alkaline earth-metal oxides and ZnO catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 371, Issues 1–2, 15 December 2009, Pages 121–130
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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