Improved operation of solar reactor for two-step water-splitting H 2 production by ceria-coated ceramic foam device

Development and experimental study for hydrogen production from the thermochemical two-step water splitting cycles with a CeO2 coated new foam device design using solar furnace system

“…It means that the temperature gradient of conical shape foam device shows uniform temperature contour than previous result [11,12].…”

“…Based on previous studies, the concentrated heat flux that is sufficient to obtain the target reduction temperatures (1500 o C) was determined. This process was conducted through simulation using the optical modeling tool "Soltrace" -developed at NREL (National Renewable Energy Laboratory, U.S.) and precedent experimental data [12][13][14][15]. The performance of the KIER 40 kW th solar furnace, as a heat source, was evaluated and a simulation model was developed.…”

“…The CeO 2 /MPSZ foam device was prepared by using a spin coating method [6]. The advantage of using foam matrix is that this structure can effectively absorb solar radiation due to its large specific surface area [6,12]. In this paper, the conical shape CeO 2 /MPSZ foam device was made by spin coat the CeO 2 powder on MPSZ foam matrix with a target ceria loading of 40 wt% (weight percent), with the detail properties explained to with ceria powder which is white color at room temperature and three holes for installation of thermocouple.…”

“…In previous studies, we reported on various operation methods for producing hydrogen using a flat disk-type ceramic foam device -MPSZ (MgO -partially stabilized zirconia) -coated with ceria powder through the spincoating method [11,12]. In the solar furnace at KIER, sufficiently heat fluxes for the reduction reactions were limited to the center region of the 15 cm diameter flat disk foam device.…”

Synthesis and thermal shock evaluation of porous SiC ceramic foams for solar thermal applications

“…In both these methods, the reduction reaction rate is low due to the incomplete optical thickness of the structures that prevents efficient transfer of solar irradiation heat and hence lowering the thermochemical reaction's performance. Recent studies have been focused to overcome the issue of heat transfer using open porous foams made entirely from redox materials . While using such porous structures has demonstrated increased reaction rates and higher CO 2 conversion efficiency due to their larger reaction surfaces, much of the recent efforts in this field has been on the choice of active redox materials (such as Zinc, Tin, Iron, Cerium oxides, Hercynite, Perovskites) and the coating quality and its subsequent effects on thermochemical reaction …”