scholarly journals Development of Methane Decomposition Reactor for Hydrogen Production Using Solar Thermal Energy

2021 ◽  
Vol 17 (2) ◽  
pp. 49-58
Author(s):  
Haneol Kim ◽  
Jongkyu Kim
Keyword(s):  
Hydrogen Production ◽  
Thermal Energy ◽  
Methane Decomposition ◽  
Solar Thermal ◽  
Solar Thermal Energy

H2 Generation by Two-Step Water Splitting With CeO2-MOx Using Concentrated Solar Thermal Energy

Solar Energy ◽  
2006 ◽  
Author(s):  
Hiroshi Kaneko ◽  
Hideyuki Ishihara ◽  
Takao Miura ◽  
Hiromitsu Nakajima ◽  
Noriko Hasegawa ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Thermal Energy ◽  
Infrared Imaging ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Solar Simulator ◽  
Solar Hydrogen ◽  
H2 Generation ◽  
Solar Hydrogen Production

CeO2-MOx (M = Mn, Fe, Ni, Cu) reactive ceramics, having high melting points and high conductivities of O2−, were synthesized with the combustion method from their nitrates for solar hydrogen production. The prepared CeO2-MOx samples were solid solutions between CeO2 and MOx with the fluorite structure through XRD. Two-step water splitting reactions with CeO2-MOx reactive ceramics proceeded at 1573–1773K for the O2 releasing step and at 1273K for the H2 generation step by irradiation of infrared imaging furnace as a solar simulator. The amounts of O2 evolved in the O2 releasing reaction with CeO2-MOx and CeO2 systems increased with the increase of the reaction temperature. The amounts of H2 evolved in the H2 generation reaction with CeO2-MOx systems except for M = Cu were more than that of CeO2 system after the O2 releasing reaction at the temperatures of 1673 and 1773K. The largest amount of H2 was generated with CeO2-NiO after the O2 releasing reaction at 1573, 1673 and 1773K. The O2 releasing reaction at 1673K and H2 generation reaction at 1273K with CeO2-Fe2O3 were repeated four times with the evolving of O2 (1.3cm3/g-sample) and H2 (2.3cm3/g-sample) gases, respectively. The possibility of solar hydrogen production with CeO2-MOx (M = Mn, Fe, Ni) reactive ceramics system by using concentrated solar thermal energy was suggested.

scholarly journals Process analysis of solar steam reforming of methane for producing low-carbon hydrogen

RSC Advances ◽  
2020 ◽  
Vol 10 (21) ◽  
pp. 12582-12597 ◽  
Author(s):  
Enkhbayar Shagdar ◽  
Bachirou Guene Lougou ◽  
Yong Shuai ◽  
Enkhjin Ganbold ◽  
Ogugua Paul Chinonso ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Thermal Energy ◽  
Steam Reforming ◽  
Fossil Fuel ◽  
Process Analysis ◽  
Solar Thermal ◽  
Low Carbon ◽  
Solar Thermal Energy ◽  
Steam Reforming Of Methane

Integrating solar thermal energy into conventional SRM technology is a promising approach for low-carbon hydrogen production based on fossil fuel in near and midterm.

Simulation Analysis of Bio-Methane Decomposition Using Solar Thermal Energy

2021 ◽  
Vol 17 (1) ◽  
pp. 40-49
Author(s):  
Haneol Kim ◽  
Sangnam Lee ◽  
Sang Jik Lee ◽  
Jongkyu Kim
Keyword(s):  
Thermal Energy ◽  
Simulation Analysis ◽  
Methane Decomposition ◽  
Solar Thermal ◽  
Solar Thermal Energy

Hydrogen Production by Solar Thermochemical Water-Splitting/Methane-Reforming Process

Solar Energy ◽  
2003 ◽  
Author(s):  
Tatsuya Kodama ◽  
Yoshiyasu Kondoh ◽  
Atsushi Kiyama ◽  
Ken-Ich Shimizu
Keyword(s):  
Hydrogen Production ◽  
Metal Oxide ◽  
Water Splitting ◽  
Thermal Energy ◽  
Experimental Studies ◽  
Reduction Process ◽  
Thermal Reduction ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Solar Thermochemical

Two different routes of solar thermochemical hydrogen production are reviewed. One is two-step water splitting cycle by using a metal-oxide redox pair. The first step is based on the thermal reduction of metal oxide, which is a highly endothermic process driven by concentrated solar thermal energy. The second step involves water decomposition with the thermally-reduced metal oxide. The first thermal reduction process requires very-high temperatures, which may be realized in sun-belt regions. Another hydrogen production route is solar reforming of natural gas (methane), which can convert methane to hydrogen via calorie-upgrading by using concentrated solar thermal energy. Solar reforming is currently the most advanced solar thermochemical process in sun belt. There is also possibility for the solar reforming to be applied for worldwide solar concentrating facilities where direct insolation is weaker than that in sun belt. Our experimental studies to improve the relevant catalytic technologies are shown and discussed.

scholarly journals Hydrogen Production in Methane Decomposition Reactor Using Solar Thermal Energy

2021 ◽  
Vol 11 (21) ◽  
pp. 10333
Author(s):  
Haneol Kim ◽  
Hakjoo Kim ◽  
Sungeun Kim ◽  
Sangnam Lee ◽  
Jongkyu Kim
Keyword(s):  
Thermal Energy ◽  
Metal Foam ◽  
Methane Decomposition ◽  
Solar Thermal ◽  
Solar Furnace ◽  
Solar Thermal Energy ◽  
Coating Application ◽  
Type Reactor ◽  
Barrier Coating ◽  
Conversion Rates

This study investigates the decomposition of methane using solar thermal energy as a heat source. Instead of the direct thermal decomposition of the methane at a temperature of 1200 °C or higher, a catalyst coated with carbon black on a metal foam was used to lower the temperature and activation energy required for the reaction, and to increase the yield. To supply solar heat during the reaction, a reactor suitable for a solar concentrating system was developed. In this process, a direct heating type reactor with quartz was initially applied, and a number of problems were identified. An indirect heating type reactor with an insulated cavity and a rotating part was subsequently developed, followed by a thermal barrier coating application. Methane decomposition experiments were conducted in a 40 kW solar furnace at the Korea Institute of Energy Research. Conversion rates of 96.7% and 82.6% were achieved when the methane flow rate was 20 L/min and 40 L/min, respectively.

Solar Hydrogen Production Integrating Low-Grade Solar Thermal Energy and Methanol Steam Reforming

2009 ◽  
Vol 131 (1) ◽  
Author(s):  
Hui Hong ◽  
Qibin Liu ◽  
Hongguang Jin
Keyword(s):  
Hydrogen Production ◽  
Energy Level ◽  
Thermal Energy ◽  
Steam Reforming ◽  
Methanol Decomposition ◽  
Solar Thermal ◽  
Methanol Steam Reforming ◽  
Solar Thermal Energy ◽  
Solar Hydrogen ◽  
Solar Hydrogen Production

In this paper, a novel approach of middle-temperature solar hydrogen production using methanol steam reforming is proposed. It can be carried out at around 200–300°C, much lower than the temperatures of other solar thermochemical hydrogen production. For the realization of the proposed solar hydrogen production, solar experiments are investigated in a modified 5 kW solar receiver/reactor with one-tracking parabolic trough concentrators. The feature of significantly upgrading the energy level from lower-grade solar thermal energy to higher-grade chemical energy is experimentally identified. The interaction between the hydrogen yield and the energy-level upgrade of solar thermal energy is clarified. Also, this kind of solar hydrogen production is experimentally compared with methanol decomposition. The preliminarily economic evaluation of the hydrogen production is identified. As a result, in the solar-driven steam reforming, the thermochemical efficiency of solar thermal energy converted into chemical energy reached up to 40–50% under a mean solar flux of 550–700 W/m2, and exceeding 90% of hydrogen production is achieved, with about 70% higher than that of methanol decomposition. The thermochemical performance of solar-driven methanol steam reforming experimentally examined at around 200–300°C for hydrogen production may be competitive with conventional methane reforming. The promising results obtained here indicate that the proposed solar hydrogen production may provide the possibility of a synergetic process of both high production of hydrogen and effective utilization of solar thermal energy at around 200–300°C.

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