An overview of the hybrid sulfur cycle process for solar hydrogen production

Lassouane, Fatiha; Menia, Sabah; Khellaf, A.

doi:10.1109/efea.2014.7059999

Cited by 2 publications

(3 citation statements)

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“…[78]. Thermochemical cycles such as sulfur-iodine [91], hybrid sulfur [92], sulfur ammonia [93], copper-chlorine [94], etc. have many advantages over methods such as recovering and recycling all the chemicals except water into the cycle, moderate operating temperatures, relatively low power input requirement, heat and water are the only inputs, [95,96].…”

Section: Green Hydrogen Technologiesmentioning

confidence: 99%

“…The amount of sulfur dioxide sent to the electrolyzer is essential in increasing hydrogen production. Thus, this step should be optimized, i.e., by producing a maximum amount of liquid sulfur dioxide and oxygen gas [92].…”

Section: Hybrid Sulfur Cyclementioning

confidence: 99%

“…The specific section of the HyS cycle is the electrochemical step in which sulfur dioxide oxidizes and produces sulfuric acid and hydrogen ions (H + ) at the anode side. Water and sulfur dioxide are used to depolarize the anode, which the electrolyzer usually works in the temperature range of 25-140 • C. The following reactions take place in this step [92,134,135]:…”

Section: Hybrid Sulfur 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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