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Cobalt based emission control catalysts with high resistance towards halide poisoning

Paper ID Volume ID Publish Year Pages File Format Full-Text
46392 46438 2012 9 PDF Available
Title
Cobalt based emission control catalysts with high resistance towards halide poisoning
Abstract

Halide poisoning is a common problem in industrial exhaust control. In this study new catalysts have been searched, which effectively oxidize hydrocarbons in the presence of methyl bromide as halide containing pollutant. The search focused on low cost mixed metal oxides based on Ce, Co, Cr and Ni. Noble metals, Cu and Mn were neglected. High throughput technologies have been applied to accelerate the development process. Screening was based on emissivity corrected IR-thermography. Potential hits were validated using conventional gas phase flow catalysis. The tested catalysts were arranged in four ternary metal oxide composition spreads: Ce–Co–Cr, Ce–Co–Ni, Ce–Cr–Ni and Co–Cr–Ni. Out of the screening, Co–Ni mixed oxides had high CO conversion rates in the presence of methyl bromide. Further these catalysts were optimized by catalyst doping and composition variation. In a 50 h long term experiment the CO oxidation in the presence of methyl bromide was checked for our best catalyst Ce5Co90Ni5Ox. Additionally, the effect of various metal oxide additives on catalytic performance and BET surface is described.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► High throughput technology composed of automated library preparation, emissivity corrected IR-thermography for screening. ► Conventional gas phase catalysis with GC-analysis for validation of potential hits. ► From over 250 materials studied, three catalysts emerged as best and most promising: Ce20Co40Cr40Ox, Co30Cr10Ni60Ox and Ce5Ni5Co90Ox. ► Materials of interest characterized by BET, XRD and XRF. ► Effect of various oxides or dopands on the catalytic performance.

Keywords
Emission control; Halide poisoning; Mixed oxides; Noble metal free; Heterogeneous catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 117–118, 18 May 2012, Pages 397–405
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