Hydrogen production from high-temperature steam electrolysis using solar energy

The high-temperature steam is used in the fields of industrial, residential, and commercial. Especially, in case of high-temperature steam, it can be used to produce hydrogen and likewise it can be used to generate electricity in the field of power generation. However, the steam condition for producing hydrogen and the steam condition for producing electricity are different, it is considerably important to distribute the high-temperature steam in condition satisfying each demand. Moreover, the required pressure and the pressure loss of a steam distributor at the load side should be considered. Therefore, In this study, the numerical simulation using ANSYS fluent was performed by dividing into pipe A(4,000kPa at use of power generation system) and pipe B(300kPa at use of hydrogen production). In addition, it was simulated according to the variation of diameter of pipe B(20mm - 30mm) for analysis of a steam distribution techology. The pressure outlet that can be used in hydrogen production was about 300kPa approximately when the diameter of pipe B was 20mm. As a result, the distribution technology that is used hydrogen production and in the power generation system was obtained through numerical simulation in proposed condition.

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A novel hybrid process for production of cyclohexanone oxime and high temperature hydrogen production using solar energy

Sustainable Energy Technologies and Assessments ◽

10.1016/j.seta.2021.101817 ◽

2022 ◽

Vol 50 ◽

pp. 101817

Author(s):

Mehdi Mehrpooya ◽

Bahram Ghorbani ◽

Arman Ekrataleshian

Keyword(s):

High Temperature ◽

Hydrogen Production ◽

Solar Energy ◽

Hybrid Process ◽

Cyclohexanone Oxime

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Metal Oxides Applied to Thermochemical Water-Splitting for Hydrogen Production Using Concentrated Solar Energy

ChemEngineering ◽

10.3390/chemengineering3030063 ◽

2019 ◽

Vol 3 (3) ◽

pp. 63 ◽

Cited By ~ 5

Author(s):

ABANADES

Keyword(s):

High Temperature ◽

Hydrogen Production ◽

Solar Energy ◽

Metal Oxide ◽

Water Splitting ◽

Transition Period ◽

Reaction Rates ◽

Special Focus ◽

Concentrated Solar Energy ◽

Conversion Rates

Solar thermochemical processes have the potential to efficiently convert high-temperature solar heat into storable and transportable chemical fuels such as hydrogen. In such processes, the thermal energy required for the endothermic reaction is supplied by concentrated solar energy and the hydrogen production routes differ as a function of the feedstock resource. While hydrogen production should still rely on carbonaceous feedstocks in a transition period, thermochemical water-splitting using metal oxide redox reactions is considered to date as one of the most attractive methods in the long-term to produce renewable H2 for direct use in fuel cells or further conversion to synthetic liquid hydrocarbon fuels. The two-step redox cycles generally consist of the endothermic solar thermal reduction of a metal oxide releasing oxygen with concentrated solar energy used as the high-temperature heat source for providing reaction enthalpy; and the exothermic oxidation of the reduced oxide with H2O to generate H2. This approach requires the development of redox-active and thermally-stable oxide materials able to split water with both high fuel productivities and chemical conversion rates. The main relevant two-step metal oxide systems are commonly based on volatile (ZnO/Zn, SnO2/SnO) and non-volatile redox pairs (Fe3O4/FeO, ferrites, CeO2/CeO2−, perovskites). These promising hydrogen production cycles are described by providing an overview of the best performing redox systems, with special focus on their capabilities to produce solar hydrogen with high yields, rapid reaction rates, and thermochemical performance stability, and on the solar reactor technologies developed to operate the solid–gas reaction systems.

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