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http://dx.doi.org/10.14478/ace.2019.1093

A Study on the H2 Oxidation over Pt/TiO2, SO2 Poisoning and Regeneration  

Lee, Dong Yoon (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University)
Kim, Sung Su (Department of Environmental Energy Engineering, Kyonggi University)
Publication Information
Applied Chemistry for Engineering / v.30, no.6, 2019 , pp. 731-736 More about this Journal
Abstract
In this article, Pt/TiO2 was manufactured in the form of powder and honeycomb, and the influence of SO2, which is a poisonous substance to catalyst, and regeneration method were investigated. The catalytic activity of Pt/TiO2 before and after the exposure to SO2 was also compared. The initial activity of Pt/TiO2 was proportional to the injected H2 concentration (1~5%). And the optimum temperature of the catalyst and conversion rate of H2 were 183 ℃ and 95%, respectively. It was confirmed that when exposing 2,800 ppm of SO2 to the powder and honeycomb Pt/TiO2, the performance of catalyst was not measurable and also 0.69% sulfur (S) remained on the catalyst surface. As a result of the cleaning and heat treatment for the poisoning catalyst, the activity of the powder catalyst exhibited a conversion rate of H2 greater than 96%. Whereas, the honeycomb catalyst showed a conversion rate of H2 greater than 95% when it was regenerated through the heat treatment of H2 or air atmosphere.
Keywords
Noble metal; Platinum; Catalyst poisoning; Catalyst generation; Sulfur dioxide;
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