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Catalytic oxidation of methane over KCl-LnCl3 eutectic molten salts

Paper ID Volume ID Publish Year Pages File Format Full-Text
50312 46789 2011 3 PDF Available
Title
Catalytic oxidation of methane over KCl-LnCl3 eutectic molten salts
Abstract

The study of the partial oxidation of methane (POM) over KCl-LnCl3 (Ln = La, Ce, Sm, Dy, Yb) eutectic molten salts was undertaken. The reaction main products were hydrocarbons (primarily C2, selectivity > 70%). The formation of hydrogen was never detected. The catalytic performance is clearly dependent on the rare earth ions properties and the factors that seem to contribute to the variation of the activity and selectivity along the lanthanide series are the mobility and the oxidative character of the rare earth trivalent ions in the potassium chloride molten melt. The activity increases with the molten salts eutetic melting temperatures and the selectivity to hydrocarbons decreases with the oxidative character of rare earth ions. To our knowledge, this is the first time that POM was studied over chloride base rare earth molten salts.

Graphical abstractMoltem metal catalysts of the type KCl-LnCl3 (Ln = La, Ce, Sm, Dy, Yb) were active for the catalytic oxidation of methane at 750 °C. The KCl-LaCl3 catalyst exhibited the highest selectivity for the production of hydrocarbons (~ 80%) that depends on the oxidative character of the lanthanide trichloride ions.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Synthesis of chloride potassium lanthanide molten salts. ► Catalytic oxidation of CH4 for the first time reported over such type of catalysts. ► High selectivity to hydrocarbons obtained over K-La and K-Sm chloride catalyst > 70%. ► Redox properties of the Ln ions influence and determine the catalysts selectivity. ► Results for the first time reported for K – Ln chloride molten salts catalysts.

Keywords
Chloride molten salts; Rare earths; Oxidation; Methane; Hydrocarbons
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 15, 15 September 2011, Pages 1425–1427
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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