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http://dx.doi.org/10.7836/kses.2017.37.2.013

A Study on Hydrogen Production with High Temperature Solar Heat Thermochemical Cycle by Heat Recovery  

Cho, Ji-Hyun (Department of Mechanical Engineering, Inha University)
Seo, Tae-Beom (Department of Mechanical Engineering, Inha University)
Publication Information
Journal of the Korean Solar Energy Society / v.37, no.2, 2017 , pp. 13-22 More about this Journal
Abstract
Two-step water splitting thermochemical cycle with $CeO_2/ZrO_2$ foam device was investigated by using a solar simulator composed of 2.5 kW Xe-Arc lamp and mirror reflector. The hydrogen production of $CeO_2/ZrO_2$ foam device depending on heat recovery of Thermal-Reduction step and Water-Decomposition step was analyzed, and the hydrogen production of $CeO_2/ZrO_2$ and $NiFe_2O_4/ZrO_2$ foam devices was compared. Resultantly, the quantity of hydrogen generation increased by 52.02% when the carrier gas of Thermal-Reduction step is preheated to $200^{\circ}C$ and, when the $N_2/steam$ is preheated to $200^{\circ}C$ in the Water-Decomposition step, the quantity of hydrogen generation increased by 35.85%. Therefore, it is important to retrieve the heat from the highly heated gases discharged from each of the reaction spaces in order to increase the reaction temperature of each of the stages and thereby increasing the quantity of hydrogen generated through this.
Keywords
Dish type solar thermal system; Two-step water splitting; Hydrogen production; Solar simulator; Heat recovery;
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