Development of a novel flowsheet for sulfur–iodine cycle based on the electrochemical Bunsen reaction for hydrogen production

Ying, Zhi; Zhang, Yao; Cui, Guomin

doi:10.1016/j.ijhydene.2017.09.035

Cited by 36 publications

(14 citation statements)

References 34 publications

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“…Furthermore, blockage of pipes and the corrosiveness of iodine are important challenges in reactor design. To solve these problems, researchers have proposed replacement of the traditional Bunsen reaction with the electrochemical Bunsen reaction. − This latter reaction methodology uses an ion-exchange membrane electrolyzer to produce H 2 SO 4 and HI. The reaction equations are as follows:…”

Section: Introductionmentioning

confidence: 99%

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

Huang

Wang

et al. 2019

Langmuir

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In the electrochemical Bunsen reaction, which is the key reaction of the sulfur-iodide cycle, the main overpotential corresponds to the oxidation of SO 2 . The catalysts currently used for the liquid phase electrocatalytic oxidation of SO 2 are mainly based on noble metals, which have excellent corrosion resistance and catalytic activity in an acidic environment. To improve the performance of the commercial Pt catalyst, a Pt catalyst with reduced graphene oxide (RGO) and carbon black as a hybrid support was synthesized by the microwave-assisted polyol reduction process. The large two-dimensional planar structure of RGO was a better anchor for Pt nanoparticles, and a catalyst with fine and uniform distribution of Pt particles was obtained. The carbon black interior prevented the agglomeration of RGO, forming a stereoscopic catalyst structure. The electrochemical test results showed that the RGO/carbon black hybrid support catalyst possessed a higher electrocatalytic activity than the single support catalysts and could be used as an efficient and stable catalyst for the SO 2 electrolyzer.

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Section: Introductionmentioning

confidence: 99%

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

Huang

Wang

et al. 2019

Langmuir

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“…Guo et al 45 reported that a vapor distillate could save a quarter to a third of energy compared with a liquid distillate, and the main energy saving occurred in the vaporization process in the HI decomposition reactor. Although the theoretical equilibrium conversion rate of HI decomposition reaction is around 22% at 450°C, many studies on process simulation and conceptual design of IS cycle have mentioned and adopted HI membrane reactors, which markedly promote the conversion of HI 32,36,38,41,43,46 . Some studies have also been conducted specifically on membrane reactors for HI decomposition.…”

Section: Description Of Is Cycle and Process Simulationmentioning

confidence: 99%

Analysis of internal heat exchange network and hydrogen production efficiency of iodine–sulfur cycle for nuclear hydrogen production

Peng

et al. 2022

Intl J of Energy Research

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Summary Nuclear energy enables large‐scale carbon‐free hydrogen production, and the coupling of the very‐high‐temperature gas‐cooled reactor and iodine–sulfur (IS) cycle has the potential to achieve efficient hydrogen production. This study develops the flowsheet of IS process, performs process simulation, designs the internal heat exchange network using pinch point technology, and discusses the thermal efficiency of hydrogen production in detail. The results show that if all heat released by heat exchangers in H2SO4 and HI sections can be fully recovered and utilized, the upper bound of the thermal efficiency of the IS process is 51.9%. The pinch point temperature difference has little impact on the performance of the heat exchange network of the H2SO4 section, but greatly influences the performance of the heat exchange network of the HI section. When the pinch point temperature difference is 5°C to 20°C, the input heat duties required by the H2SO4 and HI sections are reduced by 23.9% to 25.0% and 20.8% to 50.8%, respectively, compared with those without heat exchange networks. After designing the heat exchange network, considering the recovery and utilization of a portion of waste heat, a more realistic hydrogen production efficiency of 30.0% to 37.1% corresponding to the pinch point temperature difference of 5°C to 20°C is given. Highlights Process simulation of IS cycle is conducted to analyze its energy consumption. Internal heat exchange network is designed using pinch point technology. Network performance is studied at different pinch point temperature differences. Thermal efficiency of hydrogen production is discussed in detail.

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“…Processes with chemoorganoheterotrophic organisms using soluble substrates can achieve high productivities and allow for streamlined process design. The utilization of a defined feedstock also has the advantage of more consistent and predictable process performance, which 1 Chemical synthesis of methane (I) via coupling of water-electrolysis or sulphur-iodine cycle and Sabatier reaction: "2 H 2 O+ CO 2 → 2 O 2 + CH 4 " (Clark, 1997;Ying et al, 2017) (II) as a by-product of solid oxide electrolysis followed by methanation: (Biswas et al, 2020;Hecht et al, 2021) can be problematic when using crude biomass like e.g., cyanobacterial lysate. A basic overview of the different options for carbon-flow is presented in Figure 1 and Table 1 gives an indication of the advantages and drawbacks on process-level, depending on the type of metabolism of the deployed microbe.…”

Section: From Autotrophy To Heterotrophy-impact On Process Parameters and Complexitymentioning

confidence: 99%

Choice of Microbial System for In-Situ Resource Utilization on Mars

Averesch

2021

Front. Astron. Space Sci.

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Various microbial systems have been explored for their applicability to in-situ resource utilisation (ISRU) on Mars and suitability to leverage Martian resources and convert them into useful chemical products. Considering only fully bio-based solutions, two approaches can be distinguished, which comes down to the form of carbon that is being utilized: (a) the deployment of specialised species that can directly convert inorganic carbon (atmospheric CO2) into a target compound or (b) a two-step process that relies on independent fixation of carbon and the subsequent conversion of biomass and/or complex substrates into a target compound. Due to the great variety of microbial metabolism, especially in conjunction with chemical support-processes, a definite classification is often difficult. This can be expanded to the forms of nitrogen and energy that are available as input for a biomanufacturing platform. To provide a perspective on microbial cell factories that may be suitable for Space Systems Bioengineering, a high-level comparison of different approaches is conducted, specifically regarding advantages that may help to extend an early human foothold on the red planet.

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Development of a novel flowsheet for sulfur–iodine cycle based on the electrochemical Bunsen reaction for hydrogen production

Cited by 36 publications

References 34 publications

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

Analysis of internal heat exchange network and hydrogen production efficiency of iodine–sulfur cycle for nuclear hydrogen production

Choice of Microbial System for In-Situ Resource Utilization on Mars

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Development of a novel flowsheet for sulfur–iodine cycle based on the electrochemical Bunsen reaction for hydrogen production

Cited by 36 publications

References 34 publications

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO2 Electrocatalytic Oxidation

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO2 Electrocatalytic Oxidation

Analysis of internal heat exchange network and hydrogen production efficiency of iodine–sulfur cycle for nuclear hydrogen production

Choice of Microbial System for In-Situ Resource Utilization on Mars

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Product

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High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation