The Westinghouse Sulfur Cycle for the thermochemical decomposition of water

Brecher, L.E.; Spewock, S.; Warde, C. J.

doi:10.1016/0360-3199(77)90061-1

Cited by 132 publications

(70 citation statements)

References 2 publications

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“…Candidate catalysts for the high temperature reduction of SO 3 have been screened and analysed e mainly considering oxides of transition metals. Their catalytic activity and their durability have been investigated and quantified experimentally.…”

Section: Discussionmentioning

confidence: 99%

Sulphur based thermochemical cycles: Development and assessment of key components of the process

Roeb

Thomey

Oliveira

et al. 2013

International Journal of Hydrogen Energy

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Section: Discussionmentioning

confidence: 99%

Sulphur based thermochemical cycles: Development and assessment of key components of the process

Roeb

Thomey

Oliveira

et al. 2013

International Journal of Hydrogen Energy

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“…The reversible cell potential for the SO 2 -depolarized electrolyzer (SDE) at 25ºC is only 0.17 V in water, increasing to 0.29 V in 50-wt% H 2 SO 4 in H 2 O [Brecher et al (1977)]. This is much less than the 1.23-V reversible cell potential for water at 25°C.…”

Section: Hybrid Sulfur Cyclementioning

confidence: 99%

Feasibility of Hydrogen Production Using Laser Inertial Fusion as the Primary Energy Source

Gorensek¹

2006

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“…Both cycles include the same high-temperature step described by the net chemical reaction: Sulfuric acid is evaporated and decomposed at approximately 610 K and the resulting SO 3 is reduced to SO 2 at 1500 K. The temperature of the SO 3 reduction step can be reduced when using catalysts such as Pt, Fe 2 O 3 , or mixtures of Pt and TiO 2 [23,24]. In the hybrid sulfur-based cycle [25,26], the subsequent step is an electrochemical reaction of water and SO 2 [27,28,29,30], the Bunsen reaction, described by eq. (3) and taking place at 400 K, follows the high temperature step, resulting in two immiscible aqueous solutions consisting of aqueous sulfuric acid and HI.…”

Section: Introductionmentioning

confidence: 99%

Multi-Scale Modelling of a Solar Reactor for the High-Temperature Step of a Sulphur-Iodine-Based Water Splitting Cycle

Haussener¹,

Thomey²,

Roeb³

et al. 2012

Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer;

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The 3-step sulphur-iodine-based thermochemical cycle for splitting water is considered. The high-temperature step consists of the evaporation, decomposition, and reduction of H 2 SO 4 to SO 2 using concentrated solar process heat. This step is followed by the Bunsen reaction and HI decomposition. The solar reactor concepts proposed are based on a shell-and-tube heat exchanger filled with catalytic packed beds and on a porous ceramic foam to directly absorb solar radiation and act as reaction site. The design, modeling, and optimization of the solar reactor using complex porous structures relies on the accurate determination of their effective heat and mass transport properties. Accordingly, a multi-scale approach is applied. Ceramic foam samples are scanned using highresolution X-ray tomography to obtain their exact 3D geometrical configuration, which in turn is used in direct porelevel simulations for the determination of the morphological and effective heat/mass transport properties. These are incorporated in a volume-averaged (continuum) model of the solar reactor. Model validation is accomplished by comparing numerically simulated and experimentally measured temperatures in a 1 kW reactor prototype tested in a solar furnace. The model is further applied to analyze the influence of foam properties, reactor geometry, and operational conditions on the reactor performance.

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The Westinghouse Sulfur Cycle for the thermochemical decomposition of water

Cited by 132 publications

References 2 publications

Sulphur based thermochemical cycles: Development and assessment of key components of the process

Sulphur based thermochemical cycles: Development and assessment of key components of the process

Feasibility of Hydrogen Production Using Laser Inertial Fusion as the Primary Energy Source

Multi-Scale Modelling of a Solar Reactor for the High-Temperature Step of a Sulphur-Iodine-Based Water Splitting Cycle

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