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Role of macroporosity in macro-mesoporous red mud catalysts for slurry-phase hydrocracking of vacuum residue

Paper ID Volume ID Publish Year Pages File Format Full-Text
40262 45848 2013 8 PDF Available
Title
Role of macroporosity in macro-mesoporous red mud catalysts for slurry-phase hydrocracking of vacuum residue
Abstract

•Macro-mesoporous red mud (Ma-RM) was prepared by using PS and F-127 as co-templates.•The macroporous structure of Ma-RM was connected by the mesopores.•Ma-RM produced more liquid products in the slurry-phase hydrocracking of VR.•Ma-RM successfully suppressed coke formation more effectively at higher conversion.•The catalytic behavior was due to better accessibility to sites in macro-mesopores.

To improve the catalytic performance of red mud (RM) for slurry-phase hydrocracking of vacuum residue, macro-mesoporosity was introduced into RM using polystyrene and Pluronic F-127 as co-templates in this study. The obtained macro-mesoporous red mud (Ma-RM) catalysts were characterized by nitrogen adsorption, X-ray diffraction, ammonia temperature-programmed desorption, scanning electron microscopy, and transition electron microscopy. Subsequently, they were applied to the slurry-phase hydrocracking of vacuum residue at 490 °C for 2 h. Comparative reaction tests revealed that Ma-RM exhibited better catalytic behavior for the VR hydrocracking compared to activated RM without macropores. Ma-RM successfully suppressed coke formation and increased liquid yield in products distribution. The macroporous structure of Ma-RM was connected by mesopores containing active sites for hydrogenation. The presence of a macro-mesoporous structure enhanced hydrogenation over the catalysts due to better accessibility to the active sites for hydrogenation, which induced less coke and more liquid yield.

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Keywords
Macro-mesoporosity; Red mud; Hydrocracking; Hydrogenation; Vacuum residue; Coke
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Role of macroporosity in macro-mesoporous red mud catalysts for slurry-phase hydrocracking of vacuum residue
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 468, 5 November 2013, Pages 305–312
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
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Any Questions? feel free to contact us