Hydrogen production in the electrolysis of water in Brazil, a review

Santos, Kenia Gabriela dos; Eckert, Caroline Thaís; Rossi, Eduardo de; Bariccatti, Reinaldo Aparecido; Frigo, Elisandro Pires; Lindino, Cléber Antônio; Alves, Helton José

doi:10.1016/j.rser.2016.09.128

Cited by 131 publications

(30 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The model consists of two main parts: (i) a thermodynamics-based black-box model of the microbial reactions and (ii) a model of the fermentor hydrodynamics. Two gas compositions are evaluated separately to represent the two boundaries of possible compositions that acetogenic bacteria are able to catabolize, i.e, pure CO and a 3:1 mixture of H 2 and CO 2 , which, respectively, may be obtained industrially from the offgas of steel manufacturing [70] and by mixing the CO 2 recovered from a generic combustion process with H 2 produced from, for instance, the electrolysis of water [76].…”

Section: The Hybrid Modelmentioning

confidence: 99%

Modeling ethanol production through gas fermentation: a biothermodynamics and mass transfer-based hybrid model for microbial growth in a large-scale bubble column bioreactor

Benalcázar

Noorman

Filho

et al. 2020

Biotechnol Biofuels

View full text Add to dashboard Cite

Background: Ethanol production through fermentation of gas mixtures containing CO, CO 2 and H 2 has just started operating at commercial scale. However, quantitative schemes for understanding and predicting productivities, yields, mass transfer rates, gas flow profiles and detailed energy requirements have been lacking in literature; such are invaluable tools for process improvements and better systems design. The present study describes the construction of a hybrid model for simulating ethanol production inside a 700 m 3 bubble column bioreactor fed with gas of two possible compositions, i.e., pure CO and a 3:1 mixture of H 2 and CO 2. Results: Estimations made using the thermodynamics-based black-box model of microbial reactions on substrate threshold concentrations, biomass yields, as well as CO and H 2 maximum specific uptake rates agreed reasonably well with data and observations reported in literature. According to the bioreactor simulation, there is a strong dependency of process performance on mass transfer rates. When mass transfer coefficients were estimated using a model developed from oxygen transfer to water, ethanol productivity reached 5.1 g L −1 h −1 ; when the H 2 /CO 2 mixture is fed to the bioreactor, productivity of CO fermentation was 19% lower. Gas utilization reached 23 and 17% for H 2 /CO 2 and CO fermentations, respectively. If mass transfer coefficients were 100% higher than those estimated, ethanol productivity and gas utilization may reach 9.4 g L −1 h −1 and 38% when feeding the H 2 /CO 2 mixture at the same process conditions. The largest energetic requirements for a complete manufacturing plant were identified for gas compression and ethanol distillation, being higher for CO fermentation due to the production of CO 2. Conclusions: The thermodynamics-based black-box model of microbial reactions may be used to quantitatively assess and consolidate the diversity of reported data on CO, CO 2 and H 2 threshold concentrations, biomass yields, maximum substrate uptake rates, and half-saturation constants for CO and H 2 for syngas fermentations by acetogenic bacteria. The maximization of ethanol productivity in the bioreactor may come with a cost: low gas utilization. Exploiting the model flexibility, multi-objective optimizations of bioreactor performance might reveal how process conditions and configurations could be adjusted to guide further process development.

show abstract

Section: The Hybrid Modelmentioning

confidence: 99%

Modeling ethanol production through gas fermentation: a biothermodynamics and mass transfer-based hybrid model for microbial growth in a large-scale bubble column bioreactor

Benalcázar

Noorman

Filho

et al. 2020

Biotechnol Biofuels

View full text Add to dashboard Cite

show abstract

“…Hydrogen from stocking sources can be used as biofuels and its use has increased especially regarding use in fuel cells. Energy gains in H2 can be stored for future use so as to reduce problems arising from consumption of non-renewable resources (dos Santos et al,2017). Hydrogen from water is one alternative energy source that can reduce dependence on fossil fuels while reducing pollution (Jang et al, 2010).…”

Section: Intoductionmentioning

confidence: 99%

The Hydrogen Generator Performance of Sandwich Designed 4/4 Al-Cu Plates

Zainul

Wardani

2019

EKSAKTA

View full text Add to dashboard Cite

This research aims to make a 4/4 plate Al-Cu plate-based hydrogen generator. The method used is design and engineering as well as testing the performance of the gas produced during the electrolysis process of water. The results obtained are hydrogen reactors that are capable of producing 7.5 mL of gas from water with a supporting voltage of 2 V and an electric current of 0.6 A. In sodium acetate (CH3COONa) material 144 mL of gas is produced at a supporting voltage of 2 V and an electric current of 0.6 A.

show abstract

“…Several electrolyzers can be used to conduct water electrolyzer, such as alkaline electrolyzer, solid oxide electrolyzer, and proton exchange membrane (PEM) electrolyzer. The alkaline electrolyzer is the most developed technology, but its disadvantages are corrosive electrolyte, low maximum current density, and low operating pressure , . The solid oxide electrolyzer operates at a high temperature.…”

Section: Introductionmentioning

confidence: 99%

“…The PEM electrolyzer not only overcomes the drawbacks of the alkaline electrolyzer but also can operate at low temperatures (20–100 °C). The PEM electrolyzer is one of the most promising technologies for large‐scale hydrogen production , . The large‐scale use of hydrogen has been identified as a key‐step towards a sustainable hydrogen economy .…”

Section: Introductionmentioning

confidence: 99%

A New Direct Coupling Method for Photovoltaic Module‐PEM Electrolyzer Stack for Hydrogen Production

et al. 2018

View full text Add to dashboard Cite

A direct coupling hydrogen production system consisting of a photovoltaic (PV) cell and a proton exchange membrane (PEM) electrolyzer is established. The expression of the hydrogen production efficiency is derived and the general performance characteristics are revealed. The number of series‐parallel connected PV cell is optimized using the hydrogen production effficiency of the system as objection function. The maximum efficiency and the corresponding optimal values of the number of series‐parallel connected PV cell are obtained. In contrast to optimize the number of series‐parallel connected electrolyzer, a simple and efficent method is proposed. The effects of some important performance parameters, such as types of the solar cells, solar irradiance, and leakage resistance of the electrolyzer stacks on the hydrogen production efficiency of the direct coupling system are examined in detail. It is found that the proposed optimal coupling approach can efficiently improve the hydrogen production efficiency. Moreover, the maximum hydrogen production efficiency of the direct coupling system using the Si solar cell is higher than that of the one using the GdTe and AsGa solar cells. Finally, the hydrogen production efficiency increases as the leakage resistance increases.

show abstract

Hydrogen production in the electrolysis of water in Brazil, a review

Cited by 131 publications

References 66 publications

Modeling ethanol production through gas fermentation: a biothermodynamics and mass transfer-based hybrid model for microbial growth in a large-scale bubble column bioreactor

Modeling ethanol production through gas fermentation: a biothermodynamics and mass transfer-based hybrid model for microbial growth in a large-scale bubble column bioreactor

The Hydrogen Generator Performance of Sandwich Designed 4/4 Al-Cu Plates

A New Direct Coupling Method for Photovoltaic Module‐PEM Electrolyzer Stack for Hydrogen Production

Contact Info

Product

Resources

About