Hydrogen production from hydrogen sulfide by the iron-chlorine hybrid process

Mizuta, Susumu; Kondo, W.; Fujii, Kinjiro; Iida, Hiroshi; Isshiki, S.; Noguchi, Hiroshi; Kikuchi, Tohru; Sue, Harufusa; Sakai, Koshiro

doi:10.1021/ie00055a028

Cited by 53 publications

(24 citation statements)

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“…The spent electrolyte is regenerated by applying a voltage of 0.75-0.9 V with a current density of 100 mA/cm 2 at 70°C and sulfur passivation of the electrodes was not observed [15,22]. The overall electrolysis reaction is as follows:…”

Section: Article In Pressmentioning

confidence: 99%

“…Another but less common method for the treatment of hydrogen sulfide is the wet absorption process [15]. In the modified Claus process, sulfur and low-quality steam are produced by partial oxidation of H 2 S. Despite its success in accomplishing the above tasks, it still has some disadvantages.…”

Section: Introductionmentioning

confidence: 99%

“…This is due to the very fast and highly selective nature of the oxidizing solution involved in the process, ensuring that a negligible amount of H 2 S is left in the treated gas stream. However, it is also hydrogen consuming and only economical for small scale sulfur recovery operations [15][16][17]. To overcome this disadvantage of wet absorption processes, a hybrid type of this process which incorporates electrolysis has been studied by many researchers [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…The Japanese National Chemical Laboratory and Idemitsu Kosan Co. (IKC) revealed a novel indirect electrolysis process for making sulfur and hydrogen from H 2 S [15,22]. The described process is capable of removing H 2 S from gas streams and therefore can replace the amine plant, Claus unit and tail gas treating.…”

Section: Introductionmentioning

confidence: 99%

“…It was described by Mizuta et al [15] and Iida et al [22] as outlined below with a process flow diagram of the proposed scheme shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

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A process simulation study of hydrogen and sulfur production from hydrogen sulfide using the Fe–Cl hybrid process

Adewale¹,

Berrouk²,

Dara³

2015

Journal of the Taiwan Institute of Chemical Engineers

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Section: Article In Pressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…It was described by Mizuta et al [15] and Iida et al [22] as outlined below with a process flow diagram of the proposed scheme shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A process simulation study of hydrogen and sulfur production from hydrogen sulfide using the Fe–Cl hybrid process

Adewale¹,

Berrouk²,

Dara³

2015

Journal of the Taiwan Institute of Chemical Engineers

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Advances in Electrocatalyst Design and Mechanism for Sulfide Oxidation Reaction in Hydrogen Sulfide Splitting

Yu,

Deng,

et al. 2024

Adv Funct Materials

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Sulfide oxidation reaction (SOR) is a semi‐reaction for the electrochemical decomposition of hydrogen sulfide. Combining SOR with the hydrogen evolution reaction (HER) allows for the simultaneous splitting of hydrogen sulfide (H2S) to produce green hydrogen, reducing energy input and environmental pollution. However, the phenomenon of sulfur passivation on the anode leads to catalyst deactivation, posing a bottleneck in developing efficient SOR. Electrocatalysts with decent performance and sulfur‐tolerance play a central role in the application of SOR. Here, recent progress on electrocatalysis mechanisms and catalyst design strategies of SOR are summarized. A summary of recent progress is made in materials such as alloys, metal oxides, metal sulfides, metal selenides, and heterostructures as SOR catalysts. Additionally, some valuable design and modulation strategies are highlighted and included. Finally, this review offers an outlook on the future directions in this emerging field.

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Photocatalytic Water Splitting for Solar Hydrogen Production Using the Carbonate Effect and the Z‐Scheme Reaction

Miseki

Sayama

2018

Advanced Energy Materials

159

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for the direct utilization of solar energy have been very limited. Technologies for photovoltaic, solar thermal, and biomass energies have been realized commercially, but it is unclear whether the global energy problem will be solved in future by these simple extensional technologies. Thus, it is essential to develop new and simpler technologies with lower costs per area than photovoltaics to use low-energydensity solar energy. Photovoltaics have a serious disadvantage, as the electricity cannot be accumulated without an expensive battery. The cost of H 2 production using a simple combination of conventional photovoltaics and an electrolyzer will be highly expensive. As a promising candidate for the direct conversion of solar energy into chemical energy and solar energy accumulation, the photocatalytic splitting of water into H 2 and O 2 has been intensively investigated in the research fields of artificial photosynthesis and solar hydrogen technologies.Since the Honda-Fujishima effect was first reported, [2] TiO 2 semiconductor photo anodes have been used for water splitting to achieve low-cost H 2 production, and various photoanodes and powder photocatalysts have been widely studied. [3][4][5][6][7][8][9][10] In particular, oxide semiconductors have been widely investigated because they can be simply prepared by calcination in air and are stable for the O 2 evolution reaction. Figure 1 shows the reaction mechanisms for water splitting into H 2 and O 2 in photocatalyst and photoanode systems. In the case of n-type semiconductor photoanodes, O 2 is evolved on the photoanode and H 2 is evolved on the metal cathode, and an external bias is generally applied between the electrodes to supply a surplus potential for the reaction. In the case of powdered photocatalysts, a cocatalyst is often loaded on the semiconductor surface to accelerate the reaction. As both the oxidation and reduction reactions are completed on the small semiconductor particles, photocatalytic reactors can be simplified and easily enlarged for wide-scale use. The reaction mechanisms shown in Figure 1 are similar to the photoexcitation mechanism of semiconductors in photovoltaics; thus, the theoretical and maximum solar energy conversion efficiencies are very high (up to 30%). [11] It has been evaluated that the photocatalytic reactor cost for water splitting, where an oxide photocatalyst powder is suspended within an The development of innovative technologies for solar energy conversion and storage is important for solving the global warming problem and for establishing a sustainable society. The photocatalytic water-splitting reaction using semiconductor powders has been intensively studied as a promising technology for direct and simple solar energy conversion. However, the evolution of H 2 and O 2 gases in a stoichiometric ratio (H 2 /O 2 = 2) is very difficult owing to various issues, such as an unfavorable backward reaction and mismatched band potentials. Two important findings have widened the variety of photocatalysts available for stoichio...

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Hydrogen production from hydrogen sulfide by the iron-chlorine hybrid process

Cited by 53 publications

References 1 publication

A process simulation study of hydrogen and sulfur production from hydrogen sulfide using the Fe–Cl hybrid process

A process simulation study of hydrogen and sulfur production from hydrogen sulfide using the Fe–Cl hybrid process

Advances in Electrocatalyst Design and Mechanism for Sulfide Oxidation Reaction in Hydrogen Sulfide Splitting

Photocatalytic Water Splitting for Solar Hydrogen Production Using the Carbonate Effect and the Z‐Scheme Reaction

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