fulltext.study @t Gmail

High external surface Pt/zeolite catalysts for improving polystyrene hydrocracking

Paper ID Volume ID Publish Year Pages File Format Full-Text
54172 46999 2014 8 PDF Available
Title
High external surface Pt/zeolite catalysts for improving polystyrene hydrocracking
Abstract

•Polymer degradation presents problems of accessibility to active centers in zeolites.•Bifunctional Pt/h-HZSM-5 and Pt/ITQ-6 with increased external surface were prepared.•Their behavior was compared to that of microporous Pt/HZSM-5 and Pt/Ferrierite.•Pt/h-HZSM-5 and Pt/ITQ-6 presented enhanced activity in polystyrene hydrocracking.

Hierarchical (Pt/h-HZSM-5) and delaminated (Pt/ITQ-6) catalysts were prepared as alternative materials to reduce mass-transfer limitations in waste plastics degradation, by increasing external surface area. These catalysts were characterized and tested in polystyrene hydrocracking, and the results compared with Pt/HZSM-5 and Pt/Ferrierite, respectively, as reference materials of similar nature and highly microporous. The activity in polystyrene hydrocracking has been found to be higher in the mesoporous catalysts, Pt/h-HZSM-5 and Pt/ITQ-6. Comparing both strategies, hierarchical and delamination, the latter presents more accessibility of reactants to the active sites, better platinum dispersion and, despite the loss of acidity, higher initial rates in polystyrene hydrocracking, what makes it of great interest for catalyst optimization.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (192 K)Download as PowerPoint slide

Keywords
Plastic waste; Hydrocracking; Bifunctional catalyst; Zeolites; Hierarchical; Laminar
First Page Preview
High external surface Pt/zeolite catalysts for improving polystyrene hydrocracking
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 227, 15 May 2014, Pages 163–170
Authors
, , , , , ,
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