Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Preparation of Copper Chromite by Vaccum Freezing Drying Method and Its Catalytic Activity for Sulfuric Acid Decomposition

Preparation of Copper Chromite by Vaccum Freezing Drying Method and Its Catalytic Activity for... Iodine sulfur (IS) process is one of the most promising routes for massive and CO2‐free hydrogen production. Among the three reactions IS process composed, decomposition of sulfuric acid is the most energy intensive step and has to be conducted in the presence of catalyst. In this work, copper chromite (CuCr2O4) was prepared, characterized, and used as the catalyst for sulfuric acid decomposition reaction. The co‐precipitation preparation method of CuCr2O4 which featured in vacuum freezing drying (VFD), was applied, and the main factors which influence the structure of CuCr2O4 such as pH values of the co‐precipitation solution and calcination temperature were investigated. Results showed that pH value affected the size of copper chromite granule, when pH was between 7 and 8, the size of prepared CuCr2O4 was in nanometer scale. Calcination temperature influenced the purity of the crystal. The samples were characterized by XRD, TEM and BET. The catalytic activity of CuCr2O4 prepared by VFD was evaluated and compared with CuCr2O4 prepared by usual co‐precipitation method and Pt/Al2O3. Results showed that the activity of CuCr2O4 was close to that of Pt catalyst, but apparently higher than that of CuCr2O4 prepared by usual method. In addition, it presents good stability in the 70 h test. Therefore, it was promising to be used in the sulfuric acid decomposition step of IS process. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chinese Journal of Chemistry Wiley

Preparation of Copper Chromite by Vaccum Freezing Drying Method and Its Catalytic Activity for Sulfuric Acid Decomposition

Download PDF
6 pages

Loading next page...
 
/lp/wiley/preparation-of-copper-chromite-by-vaccum-freezing-drying-method-and-Iz2Y7r2YTx

References (13)

Publisher
Wiley
Copyright
Copyright © 2010 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1001-604X
eISSN
1614-7065
DOI
10.1002/cjoc.201190001
Publisher site
See Article on Publisher Site

Abstract

Iodine sulfur (IS) process is one of the most promising routes for massive and CO2‐free hydrogen production. Among the three reactions IS process composed, decomposition of sulfuric acid is the most energy intensive step and has to be conducted in the presence of catalyst. In this work, copper chromite (CuCr2O4) was prepared, characterized, and used as the catalyst for sulfuric acid decomposition reaction. The co‐precipitation preparation method of CuCr2O4 which featured in vacuum freezing drying (VFD), was applied, and the main factors which influence the structure of CuCr2O4 such as pH values of the co‐precipitation solution and calcination temperature were investigated. Results showed that pH value affected the size of copper chromite granule, when pH was between 7 and 8, the size of prepared CuCr2O4 was in nanometer scale. Calcination temperature influenced the purity of the crystal. The samples were characterized by XRD, TEM and BET. The catalytic activity of CuCr2O4 prepared by VFD was evaluated and compared with CuCr2O4 prepared by usual co‐precipitation method and Pt/Al2O3. Results showed that the activity of CuCr2O4 was close to that of Pt catalyst, but apparently higher than that of CuCr2O4 prepared by usual method. In addition, it presents good stability in the 70 h test. Therefore, it was promising to be used in the sulfuric acid decomposition step of IS process.

Journal

Chinese Journal of Chemistry – Wiley

Published: Dec 1, 2010

Keywords: ; ; ; ; ;

There are no references for this article.