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Design of active and stable NiCeO2ZrO2MgAl2O4 dry reforming catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
46746 46447 2011 13 PDF Available
Title
Design of active and stable NiCeO2ZrO2MgAl2O4 dry reforming catalysts
Abstract

An active and stable NiCeO2ZrO2MgAl2O4 catalyst for dry reforming in severe coking conditions (CO2/CH4 = 1.1, GHSV = 32,000 h−1, 670 °C and 1.5 bar) was developed by combining conventional and combinatorial research strategies using high-throughput experimentation. A D-optimal design was applied to setup statistically verified models for catalytic activity (XCH4,XCO2),(XCH4,XCO2), selectivity (H2/CO molar ratio) and stability (coke resistance) as function of the selected input factors, viz. the amount of active element and amount of promoters. The importance of selecting the proper objective function R and appropriate unit to express the amount of coke deposited are discussed in detail. Via the most reliable objective function R an optimal catalyst composition area is obtained, where catalysts combine high activity with a long service lifetime. It was recognized that stable dry reforming occurs only with a subtle balance of the catalyst composition. Best dry reforming performances are achieved with catalyst compositions having low Ni (2 wt%), ZrO2 (<1 wt%) and high CeO2 (>3 wt%) content.

Graphical abstract. Active NiCeO2ZrO2MgAl2O4 catalysts are developed for dry reforming in severe coking conditions using a D-optimal design. Experimentally verified models (activity, selectivity, coke amounts) were used to predict optimal catalyst compositions.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Discovery of new NiCeO2ZrO2MgAl2O4 catalyst compositions for stable dry reforming of methane in industrially relevant conditions. ► D-optimal design was used to model the catalytic performance (in terms of coke formation, selectivity and conversion) as function of the catalyst composition. ► Composition areas were predicted for stable and active reforming of methane with CO2 using a well-considered objective function. ► The importance of the selection of the proper objective function and unit for the amount of coke is emphasized.

Keywords
Dry reforming; CH4/CO2 reforming; Carbon deposition; NiCeO2ZrO2MgAl2O4; D-optimal design
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Design of active and stable NiCeO2ZrO2MgAl2O4 dry reforming catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 105, Issues 3–4, 22 June 2011, Pages 263–275
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