Status of the Solar Sulfur Ammonia Thermochemical Hydrogen Production System for Splitting Water

Taylor, Robin W.; Davenport, R.; Talbot, Jan B.; Herz, Richard K.; Luc, Wesley; Genders, D.; Symons, Peter; Brown, L. C.

doi:10.1016/j.egypro.2014.03.217

Cited by 10 publications

(11 citation statements)

References 5 publications

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“…The fundamental five steps of the metal sulfate-pyrosulfate sub-cycle are given below (based on S, N, H, K, and O) [135,152,153]:…”

Section: Sulfur Ammonia Cyclementioning

confidence: 99%

Section: Sulfur Ammonia Cyclementioning

confidence: 99%

“…Reactions ( 24) to ( 28) are chemical absorption, electrolytic oxidation, adiabatic mixing, stored thermal and electric heat processes, respectively [152]. The separation of oxygen from sulfur dioxide occurs in Reaction (24), where sulfur dioxide is absorbed in water [152]. The typical reaction of the process is Reaction (25), in which hydrogen and ammonium sulfate are produced by electrocatalytic oxidation of ammonium sulfite at 80-150 • C and low pressures [135,152].…”

Section: Sulfur Ammonia Cyclementioning

confidence: 99%

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A Review on Recent Progress in the Integrated Green Hydrogen Production Processes

2022

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The thermochemical water-splitting method is a promising technology for efficiently converting renewable thermal energy sources into green hydrogen. This technique is primarily based on recirculating an active material, capable of experiencing multiple reduction-oxidation (redox) steps through an integrated cycle to convert water into separate streams of hydrogen and oxygen. The thermochemical cycles are divided into two main categories according to their operating temperatures, namely low-temperature cycles (<1100 °C) and high-temperature cycles (<1100 °C). The copper chlorine cycle offers relatively higher efficiency and lower costs for hydrogen production among the low-temperature processes. In contrast, the zinc oxide and ferrite cycles show great potential for developing large-scale high-temperature cycles. Although, several challenges, such as energy storage capacity, durability, cost-effectiveness, etc., should be addressed before scaling up these technologies into commercial plants for hydrogen production. This review critically examines various aspects of the most promising thermochemical water-splitting cycles, with a particular focus on their capabilities to produce green hydrogen with high performance, redox pairs stability, and the technology maturity and readiness for commercial use.

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“…The fundamental five steps of the metal sulfate-pyrosulfate sub-cycle are given below (based on S, N, H, K, and O) [135,152,153]:…”

Section: Sulfur Ammonia Cyclementioning

confidence: 99%

Section: Sulfur Ammonia Cyclementioning

confidence: 99%

Section: Sulfur Ammonia Cyclementioning

confidence: 99%

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A Review on Recent Progress in the Integrated Green Hydrogen Production Processes

2022

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“…A number of recent projects have investigated solarthermally driven dissociation of water at moderate temperatures ($700 C) via metal RedOx reactions, involving zinc oxide, 82,83 ferrites, 84 cerium and zirconium oxides 85,86 as intermediaries. Alternative approaches involve ammonia-water, 87 Cu-Cl 88 and sulphur-isobutane 89 -based thermochemical processes. The hydrogen produced can be combined with syngas/CO, reformed from natural gas or by the thermal-dissociation of CO 2 , to produce fuels in a convenient form such as methane or methanol.…”

Section: Solar Fuelsmentioning

confidence: 99%

Concentrated solar power: Recent developments and future challenges

Jelley

Smith

2015

Proceedings of the Institution of Mechanical Engineers, Part A:

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With the mass-manufacture and resulting low cost of silicon photovoltaics driven by Western government subsidy schemes and large-scale manufacturing, concentrated solar power for electricity generation is now at a turning point. The present cost of mirrors, lenses, support structure and plant for concentrated solar thermal power, and of the highefficiency multi-junction cells, concentrating optics and two-axis tracking systems for concentrated photovoltaic power, has made operational concentrated solar power plants uncompetitive in most scenarios. This is changing the shape of optics as well as the materials from which they are constructed and the size of the components used. We aim to highlight the current research that is being carried out to reduce the cost of concentrated solar power and concentrate on the long-term potential for cost reduction of both concentrated solar power technologies. This review concentrates first on optical and thermodynamic fundamentals, and the technology choices imposed by real world materials. We then review the broad categories of optical concentrators. Developments in solar thermal power generation and heat and thermochemical storage are discussed before briefly describing recent research on thermoelectric generation. Recent trends in concentrated photovoltaics are summarised, and we conclude by considering the present situation for concentrated solar power in the context of mass-market silicon photovoltaics.

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“…This step produces high purity hydrogen at room temperature, and it is usually carried out in solution [3][4][5][6][7][8]. Recent efforts to enhance exploitation of the solar spectrum, within the cycle, relied on the use of photocatalysts, such as CdS and CdSeZnS, which exhibit known toxicity issues [9].…”

Section: Introductionmentioning

confidence: 99%

Raman and inelastic neutron scattering spectra of (NH4)2SO3, an intermediate for solar hydrogen production

Orozco-Mena

Parker

Herrera-Peraza

et al. 2017

International Journal of Hydrogen Energy

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Citation: RE Orozco-Mena et al. "Raman and inelastic neutron scattering spectra of (NH4)2SO3, an intermediate for solar hydrogen production. AbstractThe sulfur-ammonia (S-NH3) cycle uses the entire solar radiation spectrum to split water. It uses the UV radiation to promote the photolytic oxidation of ammonium sulfite to produce hydrogen and ammonium sulfate. Here, Raman and inelastic neutron scattering spectra of (NH4)2SO3·H2O at 20 K are discussed, supported by density functional theory (DFT) calculations. The feasibility of photolytic oxidation of this monohydrate to produce hydrogen at room temperature was also demonstrated.

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Status of the Solar Sulfur Ammonia Thermochemical Hydrogen Production System for Splitting Water

Cited by 10 publications

References 5 publications

A Review on Recent Progress in the Integrated Green Hydrogen Production Processes

A Review on Recent Progress in the Integrated Green Hydrogen Production Processes

Concentrated solar power: Recent developments and future challenges

Raman and inelastic neutron scattering spectra of (NH4)2SO3, an intermediate for solar hydrogen production

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