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Single and combined effects of Bottom Cracking (BCA) and Propylene Booster (PBA) separate particles additives addition to a Fluid Catalytic Cracking (FCC) catalyst on the FCC product distribution and quality

Paper ID Volume ID Publish Year Pages File Format Full-Text
40646 45861 2012 17 PDF Available
Title
Single and combined effects of Bottom Cracking (BCA) and Propylene Booster (PBA) separate particles additives addition to a Fluid Catalytic Cracking (FCC) catalyst on the FCC product distribution and quality
Abstract

In the present work, we have investigated how the single and combined addition of commercial separate particle additives, such as Bottom Cracking additive (BCA) and Propylene Booster additive (ZSM-5 based-PBA), to a FCC USY catalyst can influence the product distribution and quality during FCC processing. Due to the relatively low catalytic activity of the BCA additive, the increasing single addition of BCA implies a higher ratio of thermal to catalytic cracking, leading in particular to higher dry-gases and coke selectivities and a lower gasoline pool quality. The Bottom Cracking ability of the BCA additive is feed dependent and starts to be representative for high addition levels of about 50–60 wt%, allowing the increase of the LCO pool selectivity and quality. The single and low addition level (i.e. 10 wt%) of ZSM-5 based additive allows to drastically improve the light alkenes selectivity at the expense of the gasoline selectivity, improving, due to concentration effects, the quality of the FCC gasoline pool, but generally limiting the LCO selectivity and quality while the coke selectivity is little increased. The combined use of both additives looks like an interesting upgrading strategy considering that it is possible to keep a high catalytic activity, to fully take advantage of the beneficial effects of the ZSM-5 and BCA additives, and to mitigate at the same time the increase of the coke and dry gases selectivities.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (274 K)Download as PowerPoint slideHighlights► BCA addition improves the LCO quality and limits the gasoline pool quality. ► BCA addition increases the thermal to catalytic cracking ratio. ► ZSM-5 efficiency is dependent of the feed/Ecat pair ability to yield C5+ aliphatics. ► LCO selectivity and quality is negatively affected by ZSM-5 additive. ► Beneficial effects of both additives can be simultaneously obtained.

Keywords
Fluid Catalytic Cracking (FCC) catalyst; Propylene Booster additive (PBA); ZSM-5; Bottom Cracking additive (BCA); Micro-Downer (MD) unit; Micro-activity test (MAT); FCC diesel and gasoline quality; Comprehensive two-dimensional gas chromatography (GC × GC
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Single and combined effects of Bottom Cracking (BCA) and Propylene Booster (PBA) separate particles additives addition to a Fluid Catalytic Cracking (FCC) catalyst on the FCC product distribution and quality
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 439–440, 10 October 2012, Pages 57–73
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