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The effect of potassium addition to Pt supported on YSZ on steam reforming of mixtures of methane and ethane

Paper ID Volume ID Publish Year Pages File Format Full-Text
42692 45937 2009 7 PDF Available
Title
The effect of potassium addition to Pt supported on YSZ on steam reforming of mixtures of methane and ethane
Abstract

The influence of potassium addition on Pt supported on yttrium-stabilized zirconia (YSZ) was studied with FT-IR CO adsorption and CO-FT-IR-TPD, in order to understand the effect of potassium on the performance of the catalyst in reforming of mixtures of methane and ethane. Potassium modification of PtYSZ strongly influenced the conversion and rate determining steps in methane and ethane in steam reforming. Water activation is the rate determining step on PtYSZ, resulting in high surface coverage of hydrocarbon fragments during steam reforming of mixtures of methane and ethane. This led to blocking of active sites by ethane fragments and consequently low conversion of methane. If potassium is added to the catalyst, hydrocarbon activation on Pt is rate determining, resulting in low surface coverage of methane and ethane. As a result, competition effects of methane and ethane diminished on potassium modified PtYSZ, enabling simultaneous conversion of methane and ethane. The weakening of the interaction of the hydrocarbons with the Pt surface as a result of potassium addition is supported by the fact that the interaction with CO is weakened, as observed with FT-IR-TPD.

Graphical abstractThe addition of potassium to Pt supported on yttrium-stabilized zirconia (YSZ) strongly influenced the conversion and rate determining steps in methane and ethane steam reforming. A weakened interaction of the hydrocarbons was found on the potassium modified catalysts. This was supported by the fact that the interaction of the Pt surface with CO is weakened, as observed with FT-IR-TPD.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Platinum; Potassium; Steam reforming; Methane; Ethane; FT-IR CO adsorption
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The effect of potassium addition to Pt supported on YSZ on steam reforming of mixtures of methane and ethane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 362, Issues 1–2, 30 June 2009, Pages 88–94
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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