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ZSM-5 crystals grown on the wall of a long tubular reactor as a structured catalyst for cracking of endothermic fuels

Paper ID Volume ID Publish Year Pages File Format Full-Text
41005 45874 2012 6 PDF Available
Title
ZSM-5 crystals grown on the wall of a long tubular reactor as a structured catalyst for cracking of endothermic fuels
Abstract

In situ growth of ZSM-5 crystals on the surface of Ni-based alloy supports by hydrothermal synthesis and their mechanical, structural stability were investigated. ZSM-5 crystals grown on the wall of a long (750 mm) tubular reactor with a small inner diameter (1 mm) was evaluated as a structured catalyst for cracking of n-heptane as a model endothermic fuel. The results have shown that the adhesion strength between ZSM-5 crystals and the support was strong enough to resist a heating/fast-cooling cycle (the sample was immersed into water immediately after being heated to be 750 °C). The crystalline structure of ZSM-5 crystals was also stable against the heating/fast-cooling cycle. The structured catalyst was shown to be catalytically active for cracking of n-heptane (LHSV = 200 h−1) at 700 °C. The formation rates of gaseous cracking products were 9.8 ml min−1 and 29.3 ml min−1 for the bare tubular reactor and the tubular reactor with ZSM-5 crystals grown on the wall, respectively. These structured catalysts show high promise for cracking of endothermic fuels at high temperatures.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (75 K)Download as PowerPoint slideHighlights► ZSM-5/Ni-alloy composites were prepared by in situ hydrothermal synthesis. ► The composites were stable against a heating (750 °C)/fast-cooling cycle. ► ZSM-5 crystals were grown on the wall of a long tube to form a structured catalyst. ► The structured catalyst was catalytically active for cracking of endothermic fuels.

Keywords
Ni-based alloy; ZSM-5; Structured catalysts; Catalytic cracking; Endothermic fuels
First Page Preview
ZSM-5 crystals grown on the wall of a long tubular reactor as a structured catalyst for cracking of endothermic fuels
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 423–424, 7 May 2012, Pages 108–113
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis