Solar photoproduction of hydrogen. IEA technical report of the IEA Agreement of the Production and Utilization of Hydrogen

Bolton, James R.

doi:10.2172/776257

Cited by 11 publications

(5 citation statements)

References 35 publications

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“…For what concerns the gas phase, in addition to the wellknown H 2 SO 4 (g), 31 2 have also been considered. 9 These last gaseous complexes are strongly bonded coordination adducts: they have been identified using microwave spectroscopy 33,34 and matrix isolation Fourier transform infrared spectroscopy (FTIR).…”

Section: Thermodynamic Modeling Of the H 2 So 4 Decompositionmentioning

confidence: 99%

“…However, H 2 production and storage systems still encounter various technical and economical problems. Hydrogen can be produced by fuel reforming or direct water splitting at high temperature or by means of electrolysis. − However, only the second approach leads to a CO 2 -free H 2 production. Other candidate processes to obtain large-scale H 2 production could be the use of indirect thermochemical cycles that accomplish the split of H 2 O into gaseous hydrogen and oxygen by means of a heat source (i.e., solar , or nuclear primary sources) or a combination of heat and electrolysis in hybrid cases.…”

Section: Introductionmentioning

confidence: 99%

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Decomposition of H₂SO₄ by Direct Solar Radiation

Brutti

Maria

Cerri

et al. 2007

Ind. Eng. Chem. Res.

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The sulfur-iodine cycle is one of the most promising thermochemical cycles for hydrogen production. Its coupling with a solar energy primary source is a great challenge to achieve efficient and economically competitive H 2 production. Within this cycle, the decomposition of sulfuric acid plays a key role, with this process being the most energy-demanding reaction step. In this paper, a combined computational and experimental study of the decomposition at high temperature of H 2 SO 4 to SO 2 is presented. The scope of this paper is to present new information and data about the experimental high-temperature decomposition of sulfuric acid carried out in a solar reactor in view of a possible industrial exploitation of this reaction. Starting from a new complete thermodynamic modeling of the process, carried out by investigating the effect of the pressure and the temperature on the SO 2 conversion rates, the study of the high-temperature decomposition of H 2 SO 4 by direct solar radiation using a Fe 2 O 3 -based catalyst was carried out for the first time. The modeling and experimental results obtained are discussed together with the available literature. In summary, SO 2 conversion yields close to thermodynamic predictions were obtained in the temperature range 1050-1200 K at a starting sulfuric acid partial pressure of p ) 0.61 bar.

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Section: Thermodynamic Modeling Of the H 2 So 4 Decompositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Decomposition of H₂SO₄ by Direct Solar Radiation

Brutti

Maria

Cerri

et al. 2007

Ind. Eng. Chem. Res.

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“…As recognized by the IEA (International Energy Agency) [1], the use of solar energy to drive the conversion of water into hydrogen is an important area of research. It had been reported by Fujishima et al [2] that TiO 2 semiconductor particles can be used as a photocatalyst for decomposition of water to oxygen and hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Effect of sacrificial electron donors on hydrogen generation over visible light–irradiated nonmetal-doped TiO2 photocatalysts

Pal

Ghosh

Chatterjee

2011

Transition Met Chem

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Hydrogen generation over carbon-, nitrogenand sulfur-doped TiO 2 semiconductor photocatalysts (represented as C-TiO 2 , N-TiO 2 and S-TiO 2 , respectively) under visible light irradiation has been achieved using various sacrificial electron donors, namely triethanolamine, diethanolamine, monoethanolamine, triethylamine, MeOH, EtOH, EDTA, L-ascorbic acid and phenol. The highest initial rate of H 2 production was found to be in the range 1,000-2,200 lmol/g/h at ambient conditions when triethanolamine was used as sacrificial electron donor. The efficacy of hydrogen production over these photocatalysts depends strongly on the nature of the sacrificial electron donor and decreases in the following order: C-TiO 2 [ STiO 2 [ N-TiO 2 . The results of the present studies suggest that the rate of H 2 production is not simply governed by the reduction potential of the sacrificial electron donor but also by the kinetic barrier of the electron transfer process.

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“…However, practical construction and material limitations will probably keep the conversion efficiency at or below 16%. 80 By using a nanomaterial composite as the photocatalytic system, visible light-driven water breakdown can be accomplished in a reasonably simple manner just by solar light uptake followed by catalysis on a single device. When taking into account 5-10% solar-to-hydrogen conversion efficiency (STH) and ve years longevity, the projected average cost for this photocatalytic setup is 1.6-3.5 USD per kg.…”

Section: Homogeneous Photocatalytic Hydrogen Productionmentioning

confidence: 99%

Design and development of nanostructured photocatalysts for large-scale solar green hydrogen generation

Sahu,

Champati,

Pradhan

et al. 2024

Sustainable Energy Fuels

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Solar photoproduction of hydrogen. IEA technical report of the IEA Agreement of the Production and Utilization of Hydrogen

Cited by 11 publications

References 35 publications

Decomposition of H₂SO₄ by Direct Solar Radiation

Decomposition of H₂SO₄ by Direct Solar Radiation

Effect of sacrificial electron donors on hydrogen generation over visible light–irradiated nonmetal-doped TiO2 photocatalysts

Design and development of nanostructured photocatalysts for large-scale solar green hydrogen generation

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Solar photoproduction of hydrogen. IEA technical report of the IEA Agreement of the Production and Utilization of Hydrogen

Cited by 11 publications

References 35 publications

Decomposition of H2SO4 by Direct Solar Radiation

Decomposition of H2SO4 by Direct Solar Radiation

Effect of sacrificial electron donors on hydrogen generation over visible light–irradiated nonmetal-doped TiO2 photocatalysts

Design and development of nanostructured photocatalysts for large-scale solar green hydrogen generation

Contact Info

Product

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Decomposition of H₂SO₄ by Direct Solar Radiation

Decomposition of H₂SO₄ by Direct Solar Radiation