fulltext.study @t Gmail

The effects of oxidation–reduction treatment on the structure and activity of cobalt-based catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
49540 46751 2015 4 PDF Available
Title
The effects of oxidation–reduction treatment on the structure and activity of cobalt-based catalysts
Abstract

•Oxidation–reduction (OR) cycles improved the reducibility of a Ru-Co/Al2O3.•The OR treatment promoted the formation of Ru-Co bimetallic structure.•A 70% increase in CO conversion observed for an ROR-treated Ru-Co/Al2O3 catalyst.

This study reports the effects of oxidative-reductive (OR) treatment on 10 wt% Co/Al2O3 and 0.25 wt% Ru-10 wt% Co/Al2O3 catalysts. Temperature-programmed analysis revealed that the cobalt in both catalysts became more reducible with increase number of OR treatment. A reduction–oxidation–reduction treatment increased Co surface area and dispersion of the Ru-Co/Al2O3 catalyst from 7.6 to 10.1 m2/g and from 14.9% to 17.3%, respectively. The treatment also increased the CO conversion from 21% to 36% and accompanied a small increase in CH4 selectivity in Fischer–Tropsch synthesis experiments. However, the effect of OR treatment on the Co/Al2O3 catalysts was insignificant.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Oxidation–reduction; Cobalt catalysts; Ruthenium promoter
First Page Preview
The effects of oxidation–reduction treatment on the structure and activity of cobalt-based catalysts
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 59, 10 January 2015, Pages 166–169
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis