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On the synthesis of LaCl3 catalysts for oxidative chlorination of methane

Paper ID Volume ID Publish Year Pages File Format Full-Text
43292 45962 2008 8 PDF Available
Title
On the synthesis of LaCl3 catalysts for oxidative chlorination of methane
Abstract

LaCl3 is an active and selective catalyst for oxidative chlorination of methane to methyl chloride, generated in situ by chlorination from LaOCl. The latter is prepared by precipitation of La(OH)2Cl and subsequent calcination. The synthesis route was modified by using different bases in order to synthesize high surface area LaOCl catalyst precursors. Ammonium hydroxide and the organic bases tetraethylammonium hydroxide, tetrapropylammonium hydroxide, and tetrabutylammonium hydroxide are used as precipitating agents. The marked increase of the specific surface area by using organic bases indicates also that they may act as templating agents. After chlorination the specific surface areas of pure LaOCl samples decrease drastically, lanthanum carbonate, however, acts as structural promoter stabilizing the specific surface area during chlorination.

Graphical abstractLaCl3 is an active catalyst for oxidative chlorination of methane to methyl chloride, generated in situ by chlorination from LaOCl. The latter is prepared by precipitation of La(OH)2Cl and subsequent calcination. The synthesis route of LaOCl was modified by using ammonium hydroxide and three different tetraalkylammonium hydroxide bases in order to synthesize high surface area catalyst precursors. The marked increase of the specific surface area by using organic bases indicates also that they may act as templating agents.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Methane; Oxidative chlorination; Hypochlorite anion; LaCl3; LaOCl; Template synthesis
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On the synthesis of LaCl3 catalysts for oxidative chlorination of methane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 350, Issue 2, 30 November 2008, Pages 178–185
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
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