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Optimization of thermally impregnated Ni–olivine catalysts for tar removal

Paper ID Volume ID Publish Year Pages File Format Full-Text
42308 45920 2009 9 PDF Available
Title
Optimization of thermally impregnated Ni–olivine catalysts for tar removal
Abstract

Thermally impregnated Ni–olivines are potential catalysts for hot cleanup of tars generated in fluidized bed biomass gasifiers. The present study examined the influence of synthesis parameters, namely Ni precursor, preparation temperature, and olivine support upon the physiochemical and catalytic properties of Ni–olivine catalysts prepared by thermal impregnation. Catalytic activity and stability was monitored by reforming naphthalene, a model tar compound in simulated biomass-derived syngas and by reforming methane. Physiochemical properties, which include both structural (XRD, TPR, and Raman spectroscopy) and surface measurements (BET surface area and XPS), were evaluated for both fresh and spent catalysts. Choice of Ni precursor (NiO or Ni) demonstrated minimal influence upon physiochemical properties and catalytic activity and stability for naphthalene- and methane-steam reforming. The synthesis temperature (1100 and 1400 °C) and olivine support, however, did have an impact. Large structural changes and deactivation were observed when lower synthesis temperatures were used, which indicated that this formulation was not desirable. The use of the Washington olivine as the support demonstrated improved catalytic performance and stability compared to two other olivine supports and further characterization showed that treatments are important in determining the final structural features.

Graphical abstractThermally impregnated Ni–olivines are potential catalysts for hot cleanup of tars generated in fluidized bed biomass gasifiers. The present study examined the influence of synthesis parameters, namely Ni precursor, preparation temperature, and olivine support upon the physiochemical and catalytic properties of Ni–olivine catalysts prepared by thermal impregnation.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Tar removal; Biomass gasification; Ni–olivine; Catalytic stability/activation; Catalyst characterization
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Optimization of thermally impregnated Ni–olivine catalysts for tar removal
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 363, Issues 1–2, 1 July 2009, Pages 64–72
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
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Any Questions? feel free to contact us