A preliminary techno-economic analysis of photofermentative hydrogen production

Genç, Şehnaz; Koku, Harun

doi:10.1016/j.ijhydene.2023.03.475

Cited by 10 publications

(2 citation statements)

References 59 publications

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“…230 In a study, authors determined the specific cost of photofermentative hydrogen production using an established outdoor pilot-scale photobioreactor system with a capacity of 20 L. The specific hydrogen production cost was calculated at $2.7/mol (equivalent to $1362/kg of H 2 ), and when equipment cost subsidies are factored in, it amounted to $395/kg of H 2 . 231 Observing the MECs based on their techno-economic possibilities, two critical challenges have been identified: the electrode materials and the reactor design. The technological advancements, scale, and availability of energy sources influence the economic aspects of green hydrogen production through water splitting.…”

Section: Techno-economic Analysis Of Various Catalytic Hydrogen Produ...mentioning

confidence: 99%

Review and Outlook of Hydrogen Production through Catalytic Processes

Kumar,

Singh,

Dutta

2024

Energy Fuels

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Hydrogen holds immense potential as a sustainable energy source as a result of its eco-friendliness and high energy density. Thus, hydrogen can solve the energy and environmental challenges. However, it is crucial to produce hydrogen using sustainable approaches in a cost-efficient manner. Currently, hydrogen can be produced by utilizing diverse feedstocks, such as natural gas, methane, ammonia, smaller organic molecules (methanol, ethanol, glycerol, and formic acid), biomass, and water. These feedstocks undergo conversion into hydrogen through different catalytic processes, including steam reforming, pyrolysis, catalytic decomposition, gasification, electrolysis, and photoassisted methods (photoelectrochemical, photocatalysis, and biophotolysis). Researchers have extensively explored various catalysts, including metals, alloys, oxides, non-oxides, carbon-based materials, and metal−organic frameworks, for these catalytic methods. The primary objectives have been to attain higher activity, selectivity, stability, and cost effectiveness in hydrogen generation. The efficacy of these catalytic processes is significantly dependent upon the performance of the catalysts, emphasizing the need for further research and development to create more efficient catalysts. However, during catalytic hydrogen production, gases like CO 2 , O 2 , CO, N 2 , etc. are produced alongside hydrogen. Separation techniques, such as pressure swing adsorption, metal hydride separation, and membrane separation, are employed to obtain high-purity hydrogen. Furthermore, a techno-economic analysis indicates that catalytic hydrogen production through steam reforming of natural gas/methane is currently viable and commercially successful. Photovoltaic electrolysis has been commercialized, but the cost of hydrogen production is still higher. Meanwhile, other photoassisted methods are in the development phase and hold the potential for future commercialization.

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Section: Techno-economic Analysis Of Various Catalytic Hydrogen Produ...mentioning

confidence: 99%

Review and Outlook of Hydrogen Production through Catalytic Processes

Kumar,

Singh,

Dutta

2024

Energy Fuels

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“…The operation of PBRs at ambient conditions reduces the need for additional energy input, thereby reducing the process costs compared to thermochemical and electrolytic methods [11]. Some of the microbes that have been studied to carry out photo-fermentation include anaerobic bacteria of the genera Rhodobacter, Rhodobium, Rhodopseudomonas, and Rhodospirillum, which help to convert organic acids into hydrogen and carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Photo-Fermentative Bacteria Used for Hydrogen Production

Gupta,

Fernandes,

Lopes

et al. 2024

Applied Sciences

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Photo-fermentation is an efficient hydrogen production pathway in which purple non-sulfur bacteria (PNSB) play an active role and produce hydrogen as a part of their metabolism under optimal conditions. These bacteria work under the influence of light to advance their metabolism and use various substrates, such as simple sugars and volatile fatty acids, to produce hydrogen. This article presents a comparative review of several bacterial strains that have been efficiently used to produce hydrogen by photo-fermentation under different optimized conditions, including the substrate, its concentration, type and capacity of the bioreactor, light sources and intensities, and process conditions to achieve the maximum biohydrogen production rate. The analysis showed that the Rhodopseudomonas palustris is the main bacterium used for hydrogen production, with a maximum hydrogen production rate of 3.2 mM/h using 27.8 mM of glucose in a 165 mL serum bottle and 3.23 mM/h using 50 mM of glycerol at pH 7, followed by Rhodobacter sphaeroides, which gave a hydrogen production rate as high as 8.7 mM/h, using 40 mM of lactic acid, pH 7, and 30 °C temperature in a single-walled glass bioreactor. However, it is not preferred over R. palustris due to its versatile metabolism and ability to use an alternative mode if the conditions are not carefully adjusted, which can be a problem in hydrogen production.

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