Renewable hydrogen anaerobic fermentation technology: Problems and potentials

Fagbohungbe, Michael O.; Komolafe, Abiodun; Okere, Uchechukwu

doi:10.1016/j.rser.2019.109340

Cited by 29 publications

(8 citation statements)

References 153 publications

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“…where, R ev represents the revenue from the investment ($), and CI denotes the initial cost of the asset ($) (Liu et al 2021). At the time of conducting this research, the inflation rate in Ghana was 8.20% (Timmerberg and Kaltschmitt 2019), and that is what was used (Fagbohungbe et al 2019). The research also used a discount rate of 10% for the analysis (García et al 2021).…”

Section: Economic Evaluating Indicatorsmentioning

confidence: 99%

Assessing the capacity of renewable power production for green energy system: a way forward towards zero carbon electrification

Chien

Ngo

Hsu

et al. 2021

Environ Sci Pollut Res

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Ghana suffers from inadequate power supply due to increasing demand though it is amongst the African nations with the highest access to electricity. This research aims to assess the techno-economic potential of wind and solar energy potential for Ghana's northern part. We employ the Weibull distribution function, levelized cost of energy, and net present cost metrics for the economic study. The wind and solar energy resource's structure generated 72,284 kWh yearly. Both systems were identified to be too expensive if implemented under the current financing conditions in the country. The PV systems generated 38,859 kWh/year, representing 53.76% of the total electricity generated in a year, generating renewable hydrogen in the country. The findings show that sizing and management of renewable plants will fulfill the basic annual cooking demands of the populations, which are 785 kg H 2 in Ghana. The countries' capacity for developing solar hydrogen plants is further suggested by generating new solar hydrogen opportunity charts. Considering the significance of hydrogen energy under the renewable energy output, we recom-mend using hybrid systems for hydrogen production. The findings reveal which flexibility options are critical in key stages of the energy transition to a 70, 80, 90, and 100% renewable energy system.

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Section: Economic Evaluating Indicatorsmentioning

confidence: 99%

Assessing the capacity of renewable power production for green energy system: a way forward towards zero carbon electrification

Chien

Ngo

Hsu

et al. 2021

Environ Sci Pollut Res

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show abstract

“…8,9 It is to note that the efficiency in H 2 production of AHF could be easily affected by inoculants, environmental factors, and microbial community. 10,11 Previous studies indicated that the H 2 yield from biomass and coal can reach 0−20 g H 2 /kg substrate by AHF within a few hours to days. 12,13 Compared to AHF, the H 2 yield of 30−300 g H 2 /kg substrate can be stably obtained from biomass and coal by GHP within a few seconds to minutes.…”

Section: ■ Introductionmentioning

confidence: 99%

Highly Efficient Transformation of Tar Model Compounds into Hydrogen by a Ni–Co Alloy Nanocatalyst During Tar Steam Reforming

Chen,

Liu,

Chen

et al. 2024

Environ. Sci. Technol.

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Hydrogen (H 2 ) production from coal and biomass gasification was considered a long-term and viable way to solve energy crises and global warming. Tar, generated as a hazardous byproduct, limited its large-scale applications by clogging and corroding gasification equipment. Although catalytic steam reforming technology was used to convert tar into H 2 , catalyst deactivation restricted its applicability. A novel nanocatalyst was first synthesized by the modified sol−gel method using activated biochar as the support, nickel (Ni) as the active component, and cobalt (Co) as the promoter for converting tar into H 2 . The results indicated that a high H 2 yield of 263.84 g H 2 / kg TMCs (Tar Model Compounds) and TMC conversion of almost 100% were obtained over 6% Ni−4% Co/char, with more than 30% increase in hydrogen yield compared to traditional catalysts. Moreover, 6% Ni−4% Co/char exhibited excellent resistance to carbon deposition by removing the nucleation sites for graphite formation, forming stable Ni−Co alloy, and promoting the char gasification reaction; resistance to oxidation deactivation due to the high oxygen affinity of Co and reduction of the oxidized nickel by H 2 and CO; resistance to sintering deactivation by strengthened interaction between Ni and Co, high specific surface area (920.61 m 2 /g), and high dispersion (7.3%) of Ni nanoparticles. This work provided a novel nanocatalyst with significant potential for long-term practical applications in the in situ conversion of tar into H 2 during steam reforming.

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“…However, relevant studies had shown that serious corrosion problems occurred during the operation of UASB reactor [4][5][6][7]. This was mainly because a water film with the thickness of 20-30 molecular will be absorbed on the surface of the metal, to form the electrochemical corrosion environment.…”

Section: Introductionmentioning

confidence: 99%

Study on the failure analysis of four metals for anaerobic fermentation reactor based on numerical simulation and electrochemical method

Wang

2023

Mater. Res. Express

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The core problem of low energy consumption anaerobic fermentation reactor is that the reactor can make reasonable and effective use of energy from two aspects of quantity and quality, so as to ensure the anaerobic fermentation performance of the reactor and make it run efficiently and energy-saving. However, serious corrosion of metal for reactors was found during operation, and the selection of reactor materials became the key to restrict biogas production. In this paper, the corrosion characteristics of the four metals including Q235A steel, Q345A steel, 45# steel and 3Cr13 steel were determined by corrosion morphology, mechanical and electrochemical experiments. The results showed that the corrosion product particles of Q235A steel were polygonal, showing a good cross-linking feature, which was better than that of Q345A and 45# steels. However, there was no obvious boundary between corrosion product particles of 3Cr13 steel. The presence of Fe3C in the corrosion products of 3Cr13 steel and the observation of micro-cracks on the surface at nanometer scale indicated that the intergranular corrosion of 3Cr13 steel was dominated. For another aspect, with the increase of CO2 and CH4 content, the corrosion rate of the four metals was generally accelerated, in which the Q235A steel showed the best performance under different conditions. In addition, Q345A and 45# steels showed relatively good corrosion resistance, under which the total mole of mixed gas (CO2/H2O/CH4) was lowest.

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Renewable hydrogen anaerobic fermentation technology: Problems and potentials

Cited by 29 publications

References 153 publications

Assessing the capacity of renewable power production for green energy system: a way forward towards zero carbon electrification

Assessing the capacity of renewable power production for green energy system: a way forward towards zero carbon electrification

Highly Efficient Transformation of Tar Model Compounds into Hydrogen by a Ni–Co Alloy Nanocatalyst During Tar Steam Reforming

Study on the failure analysis of four metals for anaerobic fermentation reactor based on numerical simulation and electrochemical method

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