Comparison of Photocatalytic Hydrogen Production from Glycerol and Crude Glycerol Obtained from Biodiesel Processing

Skaf, Dorothy W.; Natrin, Nicholas G.; Brodwater, Kevin C.; Bongo, Christopher R.

doi:10.1007/s10562-012-0886-1

Cited by 23 publications

(9 citation statements)

References 15 publications

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“…In contrast to thermocatalytic aqueous phase reforming, which entails side pathways generating methane and other alkanes as by-products, essentially quantitative (stoichiometric, see equation 21) production of H2 has been proven by means of photoreforming [9, 24, 39a, 345]. From an economical and environmental perspective, the photocatalytic production of H2 from crude glycerol represents a valuable opportunity, whilst also a technological challenge due to the impurities present [276,287].…”

Section: Glycerol and Other Polyols The Rapid Development Of The Biomentioning

confidence: 99%

Photocatalytic production of hydrogen from biomass-derived feedstocks

Puga

2016

Coordination Chemistry Reviews

379

270

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The application of photocatalysis for the utilisation of sunlight energy is intensely investigated in present times, particularly in prospect of generating solar fuels by hydrogen production or CO2 reduction processes as tools for societies aiming to relief their thirst for fossil resources. From the perspective of sustainability, the rational use of biomass-derived feedstocks for photocatalytic H2 production is a feasible, proven and highly efficient process. In this review, in addition to delving into physico-chemical fundamentals of photocatalytic processes on semiconductors, the research activity on this topic related to design of revolutionary semiconductor-based materials, generally including metallic nanoparticles or complexes as hydrogen-evolving co-catalysts, is outlined and critically evaluated. Moreover, the use of sunlight and renewable feedstocks for the generation of hydrogen, as a compelling opportunity for the energy sector, is emphasised. Special focus is also set on the valorisation of biorefinery products, agricultural residues and industrial or municipal waste.

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Section: Glycerol and Other Polyols The Rapid Development Of The Biomentioning

confidence: 99%

Photocatalytic production of hydrogen from biomass-derived feedstocks

Puga

2016

Coordination Chemistry Reviews

379

270

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“…In the last decade an increasing attention has been devoted to Cu 2 O and CuO as photocatalyst in combination with TiO 2 . [14][15][16][17][18][19][20][21][22][23][24] The copper oxides show a band gap lower than titania (2.1 eV for Cu 2 O and 1.2 eV for CuO), making them as suitable candidates for photo-splitting water and/or photoreforming to produce hydrogen by using visible light. Unfortunately the copper oxides are unstable in electrolytic solutions because of their facile photo-oxidation, but the interaction with TiO 2 by heterojunction may enhance protection against photocorrosion.…”

Section: Introductionmentioning

confidence: 99%

H2 production by selective photo-dehydrogenation of ethanol in gas and liquid phase on CuOx/TiO2 nanocomposites

et al. 2013

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CuOx/TiO2 nanocomposites prepared by copper photodeposition (1.0 and 2.5 wt% copper loading) on TiO2 (synthesized by three different routes) are studied in the ethanol photo-dehydrogenation in gas- and liquid-phase operations, and characterized in terms of surface area, phase composition by XRD, morphology and copper-oxide nanoparticle size distribution, and copper species by UV-visible diffuse reflectance spectroscopy. Cu2+ ions partially enter into the titania structure leading to the creation of oxygen vacancies responsible for the shift in the band gap, but also the creation of traps for photogenerated holes and electrons. While the band gap shifts to lower energies with the copper content, a maximum photocatalytic activity is shown for the intermediate copper loading. Gas-phase operations allow a higher H2 productivity with respect to liquid-phase operations, and especially a higher selectivity (about 92–93%) to acetaldehyde. It is remarked that the route of photo-dehydrogenation of ethanol to H2 and acetaldehyde has an economic value about 3.0–3.5 times higher than the alternative route of photoreforming to produce H2. Gas-phase operations would be preferable for the photo-dehydrogenation of ethanol

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“…It was reported that only 0.05 wt % Pt on TiO 2 as a cocatalyst can increase the rate of glycerol transformation into hydrogen around 370 times . Although Pt is the most common cocatalyst for hydrogen production from glycerol, ,,,,,,,− ,− ,,,,,− other metals like Cu, ,,,,,,,,,,,,, Au, ,,,,,, Pd, ,,,,, Ni, ,,,,, Co, ,, Ag, ,, Mn, Ru, Rh, Bi, , Cr, , and W have also been employed as cocatalysts to enhance the TiO 2 photocatalytic activity.…”

Section: Photocatalyst Development For Glycerol Valorizationmentioning

confidence: 99%

Current Developments and Future Trends in Photocatalytic Glycerol Valorization: Photocatalyst Development

Estahbanati

Feilizadeh

Attar

et al. 2020

Ind. Eng. Chem. Res.

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Glycerol is a significant byproduct of biomass conversion into biodiesel, and numerous studies have been focused on its valorization technologies in recent years. Photocatalytic glycerol valorization is a promising technology to convert solar energy into chemical energy by producing hydrogen and value-added liquid products. This technology is desirable from the point of view of both green chemistry and sustainable development since it can operate at ambient temperature and atmospheric pressure by using renewable solar energy. The key element for a successful photocatalytic glycerol valorization process is the development of highly active and stable photocatalysts. In this context, the present review deals with novel techniques to improve photocatalysts’ activity. It reviews the main characteristics, preparation methods, advantages, and drawbacks as well as the performance of different TiO2-based and non-TiO2-based photocatalysts for glycerol conversion. Also, an analysis is presented on the most effective approaches for increasing the photocatalytic activity, including cocatalyst deposition, doping with metallic and nonmetallic ions, development of carbonaceous composites, and formation of heterojunctions. The review also offers the readers ongoing challenges and opportunities for research on photocatalyst development to selectively convert glycerol into hydrogen and value-added liquid products.

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Comparison of Photocatalytic Hydrogen Production from Glycerol and Crude Glycerol Obtained from Biodiesel Processing

Cited by 23 publications

References 15 publications

Photocatalytic production of hydrogen from biomass-derived feedstocks

Photocatalytic production of hydrogen from biomass-derived feedstocks

H2 production by selective photo-dehydrogenation of ethanol in gas and liquid phase on CuOx/TiO2 nanocomposites

Current Developments and Future Trends in Photocatalytic Glycerol Valorization: Photocatalyst Development

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