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http://dx.doi.org/10.17137/korrae.2021.29.4.47

A optimization study on the preparation and coating conditions on honeycomb type of Pd/TiO2 catalysts to secure hydrogen utilization process safety  

Jang, Young hee (Department of Environmental Energy Engineering, Kyonggi University)
Lee, Sang Moon (Department of Environmental Energy Engineering, Kyonggi University)
Kim, Sung Su (Department of Environmental Energy Engineering, Kyonggi University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.29, no.4, 2021 , pp. 47-54 More about this Journal
Abstract
In this study, the performance of a honeycomb-type hydrogen oxidation catalyst to remove hydrogen in a hydrogen economy society to secure leaking hydrogen. The Pd/TiO2 catalyst was prepared based on a liquid phase reduction method that is not exposed to a heat source, and it was showed through H2-chemisorption analysis that it existed as very small active particles of 2~4 nm. In addition, it was found that the metal dispersion decreased and the active particle size increased as the reduction reaction temperature increased. It was meant that the active metal particle size and the hydrogen oxidation performance were in a proportional correlation, so that it was consistent with the hydrogen oxidation performance reduction result. The prepared catalyst was coated on a support in the form of a honeycomb so that it could be applied to the hydrogen industrial process. When 20 wt% or more of the AS-40 binder was coated, oxidation performance of 90% or more was observed under low-concentration hydrogen conditions. It was showed through SEM analysis that long-term catalytic activity can be expected by enhancing the adhesion strength of the catalyst and preventing catalyst desorption. It is a basic research that can secure safety in a hydrogen society such as gasification, organic resource, and it can be utilized as a system that can respond to unexpected safety accidents in the future.
Keywords
hydrogen catalytic oxidation; $Pd/TiO_2$; liquid-phase reduction; room temperature; safety;
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