Solar pilot plant scale hydrogen generation by irradiation of Cu/TiO2 composites in presence of sacrificial electron donors

Maldonado, Manuel I.; López-Martín, Ángeles; Colón, G.; Peral, José; Martínez-Costa, J.I.; Malato, S.

doi:10.1016/j.apcatb.2018.02.005

Cited by 64 publications

(45 citation statements)

References 55 publications

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“…Concomitantly, CO 2 productions were even faster for both materials (Table S5). The photocatalytic H2 production from municipal wastewaters has been previously reported by Malato and co-workers as a process of limited efficiency using M/TiO2 (M = Pt [55], Au [56] or Cu [57]). The authors attributed the low activity to the presence of different kinds of solutes inhibiting H2 evolution, in particular ionic species, albeit the detrimental effect of recalcitrant organic matter cannot be ruled out.…”

Section: Photocatalytic Hydrogen Production Form Wastewatersmentioning

confidence: 86%

Assessment of Photocatalytic Hydrogen Production from Biomass or Wastewaters Depending on the Metal Co-Catalyst and Its Deposition Method on TiO2

Imizcoz

Puga

2019

Catalysts

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A systematic study on the solar photocatalytic hydrogen production (photoreforming) performance of M/TiO2 (M = Au, Ag, Cu or Pt) using glucose as a model substrate, and further extended to lignocellulose hydrolysates and wastewaters, is herein presented. Three metal (M) co-catalyst loading methods were tested. Variation of the type of metal results in significantly dissimilar H2 production rates, albeit the loading method exerts an even greater effect in most cases. Deposition-precipitation (followed by hydrogenation) or photodeposition provided better results than classical impregnation (followed by calcination). Interestingly, copper as a co-catalyst performed satisfactorily as compared to Au, and slightly below Pt, thus representing a realistic inexpensive alternative to noble metals. Hydrolysates of either α-cellulose or rice husks, obtained under mild conditions (short thermal cycles at 160 °C), were rich in saccharides and thus suitable as feedstocks. Nonetheless, the presence of inhibiting byproducts hindered H2 production. A novel photocatalytic UV pre-treatment method was successful to initially remove the most recalcitrant portion of these minor products along with H2 production (17 µmol gcat−1 h−1 on Cu/TiO2). After a short UV step, simulated sunlight photoreforming was orders of magnitude more efficient than without the pre-treatment. Hydrogen production was also directly tested on two different wastewater streams, that is, a municipal influent and samples from operations in a fruit juice producing plant, with remarkable results obtained for the latter (up to 115 µmol gcat−1 h−1 using Au/TiO2).

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Section: Photocatalytic Hydrogen Production Form Wastewatersmentioning

confidence: 86%

Assessment of Photocatalytic Hydrogen Production from Biomass or Wastewaters Depending on the Metal Co-Catalyst and Its Deposition Method on TiO2

Imizcoz

Puga

2019

Catalysts

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“…However, they are focused on wastewater treatment rather than H 2 production . A limited number of works about photocatalytic H 2 production at pilot plant‐scale have been reported . All of them belong to the group of HETPHP systems.…”

Section: Future Perspectivesmentioning

confidence: 99%

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Corredor

Rivero

Rangel

et al. 2019

J of Chemical Tech & Biotech

147

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Hydrogen represents a renewable energy alternative that may positively contribute to get over the global energy crisis while at the same time reducing its environmental burden. Overcoming the challenge of reaching this potential could be helped by careful choice of hydrogen (H2) sources. Photocatalytic generation of H2, although a minor alternative, appears to be a very good option at the time that liquid wastes are being degraded; therefore, this approach has given rise to an increasing number of interesting studies. Here, we aim to provide an integrated overview of the different photocatalytic, heterogeneous, homogeneous and hybrid systems. First, we categorize the units and mechanisms that take part in the photocatalytic process, and secondly we analyze their role and draw comparative conclusions. Thus, we analyze the role of (i) the electron source to carry out proton reduction, (ii) the proton source, which can be free protons in the medium or a proton donor compound, (iii) the catalyst nature and concentration, and (iv) the photosensitizer nature and concentration. We also provide an analysis of the influence of the solvent, especially in homogenous systems as well as the influence of pH. We provide a comparison of the photocatalytic performance, highlighting the advantages and disadvantages, of different systems. Thus, this review is, on the one hand, an update on the state of the art of photocatalytic generation of H2 from a full perspective that integrates homogeneous, heterogeneous and hybrid systems, and, on the other, a source of useful information for future research. © 2019 Society of Chemical Industry

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“…A few studies carried out in Plataforma Solar de Almería, Spain since 2013 demonstrated photocatalytic hydrogen evolution from aqueous formic acid, methanol, glycerol and organic wastewater. [136][137][138] The pilot plants had been designed for water treatment and thus, as discussed earlier, had solar concentration factors of ~1 to maximize the utilization of diffuse sunlight. The relative effectiveness of the hole scavengers were found to depend on the type of the catalyst, but in all cases the hydrogen evolution from wastewater was at least an order of magnitude slower than in the presence of other hole scavengers.…”

Section: Progress In Pilot Testsmentioning

confidence: 99%

“…Considering the contribution of the measured part to the total irradiance in a standard AM1.5G spectrum, the STH based on total solar irradiance is 3.8 and 22 times lower than the value reported based on λ < 550 nm and λ < 400 nm irradiance, respectively. While solar hydrogen evolution with concurrent wastewater treatment was proven possible, the low reaction rate along with peculiar consumption of already formed hydrogen and catalyst deactivation 138 renders the potential of the technology unclear for commercial hydrogen production.…”

Section: Progress In Pilot Testsmentioning

confidence: 99%

Research advances towards large-scale solar hydrogen production from water

et al. 2019

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Solar hydrogen production from water is a sustainable alternative to traditional hydrogen production route using fossil fuels. However, there is still no existing large-scale solar hydrogen production system to compete with its counterpart. In this Review, recent developments of four potentially cost-effective pathways towards large-scale solar hydrogen production, viz. photocatalytic, photobiological, solar thermal and photoelectrochemical routes, are discussed, respectively. The limiting factors including efficiency, scalability and durability for scale-up are assessed along with the field performance of the selected systems. Some benchmark studies are highlighted, mostly addressing one or two of the limiting factors, as well as a few recent examples demonstrating upscaled solar hydrogen production systems and emerging trends towards large-scale hydrogen production. A techno-economic analysis provides a critical comparison of the levelized cost of hydrogen output via each of the four solar-to-hydrogen conversion pathways.

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Solar pilot plant scale hydrogen generation by irradiation of Cu/TiO2 composites in presence of sacrificial electron donors

Cited by 64 publications

References 55 publications

Assessment of Photocatalytic Hydrogen Production from Biomass or Wastewaters Depending on the Metal Co-Catalyst and Its Deposition Method on TiO2

Assessment of Photocatalytic Hydrogen Production from Biomass or Wastewaters Depending on the Metal Co-Catalyst and Its Deposition Method on TiO2

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Research advances towards large-scale solar hydrogen production from water

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