Optimization of SnCl4 Concentration During the Synthesis of a Highly Active SnO2-Based Catalyst for SO2 Catalytic Reduction

Title
Optimization of SnCl4 Concentration During the Synthesis of a Highly Active SnO2-Based Catalyst for SO2 Catalytic Reduction
Author(s)
이태진박노국정철호백점인[백점인]이중범[이중범]류청걸[류청걸]
Keywords
METAL OXIDE CATALYSTS; SULFUR-DIOXIDE; ELEMENTAL SULFUR; CARBON-MONOXIDE; CO; LANTHANUM; HYDROGEN; ALUMINA; LA2O2S
Issue Date
201210
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS, v.7, no.5, pp.530 - 535
Abstract
In this study, the catalytic reduction of SO2 over an SnO2 catalyst was investigated for direct sulfur recovery. The surface area of SnO2 was also controlled with respect to changes in the concentration of the SnCl4 solution used as the precursor for high catalytic activity. The SnO2 catalyst was prepared by the precipitation method and tin chloride pentahydrate (SnCl4 center dot 5H(2)O, Aldrich) and ammonium hydroxide (NH4OH) were used as the precursor and precipitate for the preparation of SnO2, respectively. The viscosity of the precipitated solution was measured in order to investigate the relation between the viscosity of the precipitated solution and the surface area of the catalyst as the final product. The activity tests for SnO2 catalysts prepared in this study were carried out in the range of 300 similar to 450 degrees C at 20 atm. The concentration of the precursor solution for the experiments was controlled in the range of 0.75 similar to 4.0 M. The surface area of SnO2 prepared with a precursor solution of low concentration was higher than that prepared at a high concentration. It was confirmed that the catalytic activity of a high surface area catalyst was higher than that of low surface area catalysts. Therefore, it was concluded that controlling the concentration of the precursor solution is of great importance for the preparation of SnO2 based catalysts.
URI
http://hdl.handle.net/YU.REPOSITORY/27109http://dx.doi.org/10.1166/jno.2012.1393
ISSN
1555-130X
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공과대학 > 화학공학부 > Articles
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