Metal oxide photoanodes for solar hydrogen production

2008 ◽  
Vol 18 (20) ◽  
pp. 2298 ◽  
Author(s):  
Bruce D. Alexander ◽  
Pawel J. Kulesza ◽  
Iwona Rutkowska ◽  
Renata Solarska ◽  
Jan Augustynski
Keyword(s):  
Hydrogen Production ◽  
Metal Oxide ◽  
Solar Hydrogen ◽  
Solar Hydrogen Production

Solar Hydrogen Production by a Two-Step Cycle Based on Mixed Iron Oxides

Solar Energy ◽  
2005 ◽  
Author(s):  
Martin Roeb ◽  
Christian Sattler ◽  
Ruth Klu¨ser ◽  
Nathalie Monnerie ◽  
Lamark de Oliveira ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Solar Energy ◽  
Metal Oxide ◽  
Iron Oxides ◽  
Operating Conditions ◽  
Solar Furnace ◽  
Solar Irradiation ◽  
Redox Systems ◽  
Solar Hydrogen ◽  
Solar Hydrogen Production

A very promising method for the conversion and storage of solar energy into a fuel is the dissociation of water to oxygen and hydrogen, carried out via a two-step process using metal oxide redox systems such as mixed iron oxides, coated upon multi-channeled honeycomb ceramic supports capable of absorbing solar irradiation, in a configuration similar to that encountered in automobile exhaust catalytic converters. With this configuration, the whole process can be carried out in a single solar energy converter, the process temperature can be significantly lowered compared to other thermo-chemical cycles and the re-combination of oxygen and hydrogen is prevented by fixing the oxygen in the metal oxide. For the realization of the integrated concept, research work proceeded in three parallel directions: synthesis of active redox systems, manufacture of ceramic honeycomb supports and manufacture, testing and optimization of operating conditions of a thermochemical solar receiver-reactor. The receiver-reactor has been developed and installed in the solar furnace in Cologne, Germany. It was proven that solar hydrogen production is feasible by this process demonstrating that multi cycling of the process was possible in principle.

Solar Hydrogen Production by a Two-Step Cycle Based on Mixed Iron Oxides

2005 ◽  
Vol 128 (2) ◽  
pp. 125-133 ◽  
Author(s):  
Martin Roeb ◽  
Christian Sattler ◽  
Ruth Klüser ◽  
Nathalie Monnerie ◽  
Lamark de Oliveira ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Solar Energy ◽  
Metal Oxide ◽  
Iron Oxides ◽  
Operating Conditions ◽  
Solar Furnace ◽  
Solar Irradiation ◽  
Redox Systems ◽  
Solar Hydrogen ◽  
Solar Hydrogen Production

A promising method for the conversion and storage of solar energy into hydrogen is the dissociation of water into oxygen and hydrogen, carried out via a two-step process using metal oxide redox systems such as mixed iron oxides, coated upon multi-channeled honeycomb ceramic supports capable of absorbing solar irradiation, in a configuration similar to that encountered in automobile exhaust catalytic converters. With this configuration, the whole process can be carried out in a single solar energy converter, the process temperature can be significantly lowered compared to other thermo-chemical cycles and the recombination of oxygen and hydrogen is prevented by fixing the oxygen in the metal oxide. For the realization of the integrated concept, research work proceeded in three parallel directions: synthesis of active redox systems, manufacture of ceramic honeycomb supports and manufacture, testing and optimization of operating conditions of a thermochemical solar receiver-reactor. The receiver-reactor has been developed and installed in the solar furnace in Cologne, Germany. It was proven that solar hydrogen production is feasible by this process demonstrating that multicycling of the process was possible in principle.

scholarly journals Efficiency gains for thermally coupled solar hydrogen production in extreme cold

2021 ◽  
Author(s):  
Moritz Kölbach ◽  
Kira Rehfeld ◽  
Matthias M. May
Keyword(s):  
Hydrogen Production ◽  
Thermal Coupling ◽  
Efficiency Gains ◽  
Solar Hydrogen ◽  
World Regions ◽  
Extreme Cold ◽  
Solar Hydrogen Production

We analyse the potential of solar hydrogen production in remote and cold world regions such as Antarctica and quantify the efficiency benefits of thermal coupling.

scholarly journals Electrochemical Hydrogen Production Powered by PV/CSP Hybrid Power Plants: A Modelling Approach for Cost Optimal System Design

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3437
Author(s):  
Andreas Rosenstiel ◽  
Nathalie Monnerie ◽  
Jürgen Dersch ◽  
Martin Roeb ◽  
Robert Pitz-Paal ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Power Plants ◽  
Large Scale ◽  
Energy System ◽  
Solar Hydrogen ◽  
Energy System Model ◽  
Optimal System Design ◽  
Solar Hydrogen Production ◽  
Electrochemical Water Splitting ◽  
Climate Neutrality

Global trade of green hydrogen will probably become a vital factor in reaching climate neutrality. The sunbelt of the Earth has a great potential for large-scale hydrogen production. One promising pathway to solar hydrogen is to use economically priced electricity from photovoltaics (PV) for electrochemical water splitting. However, storing electricity with batteries is still expensive and without storage only a small operating capacity of electrolyser systems can be reached. Combining PV with concentrated solar power (CSP) and thermal energy storage (TES) seems a good pathway to reach more electrolyser full load hours and thereby lower levelized costs of hydrogen (LCOH). This work introduces an energy system model for finding cost-optimal designs of such PV/CSP hybrid hydrogen production plants based on a global optimization algorithm. The model includes an operational strategy which improves the interplay between PV and CSP part, allowing also to store PV surplus electricity as heat. An exemplary study for stand-alone hydrogen production with an alkaline electrolyser (AEL) system is carried out. Three different locations with different solar resources are considered, regarding the total installed costs (TIC) to obtain realistic LCOH values. The study shows that a combination of PV and CSP is an auspicious concept for large-scale solar hydrogen production, leading to lower costs than using one of the technologies on its own. For today’s PV and CSP costs, minimum levelized costs of hydrogen of 4.04 USD/kg were determined for a plant located in Ouarzazate (Morocco). Considering the foreseen decrease in PV and CSP costs until 2030, cuts the LCOH to 3.09 USD/kg while still a combination of PV and CSP is the most economic system.

Sign in / Sign up

Export Citation Format

Share Document