A Review of the Enhancement of Bio-Hydrogen Generation by Chemicals Addition

Sun, Yi; He, Jun; Yang, Gang; Sun, Guang–Zhen; Sage, Valérie

doi:10.3390/catal9040353

Cited by 82 publications

(39 citation statements)

References 140 publications

(91 reference statements)

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“…Sulfur‐free fuels can be produced from syngas (CO, H 2 ) by Fischer‐Tropsch synthesis . H 2 can be generated from various renewable resources, for example from water electrolysis , e.g., with surplus energy from renewable sources, or with enzymes from sugar as feedstock . CO can be obtained by the reverse water‐gas shift reaction of CO 2 and H 2 .…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Triphase Extractive Oxidative Desulfurization of Benzothiophene with Molecular Oxygen Catalyzed by HPA‐5

et al. 2020

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The triphasic aerobic extractive desulfurization of benzothiophene (BT) using an aqueous H8[PV5Mo7O40] solution as catalyst and O2 as oxidant was investigated. A time‐resolved analysis of all reaction products in the gas, organic and aqueous phase, is given. The organic sulfur in BT is mainly converted to sulfuric acid. Mass transport limitations can be excluded. The reaction orders are 1 with regard to BT, and 0.5 both for HPA‐5 and O2. Calculated data derived from this mechanism with a power law kinetic approach show good agreement to the experimental data for conversions below 60 %. At higher BT conversions, significant deviations are found, suggesting that acidic products formed in the BT oxidation affect the catalyst and therefore the initial kinetics of the BT oxidation.

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Section: Introductionmentioning

confidence: 99%

Kinetics of Triphase Extractive Oxidative Desulfurization of Benzothiophene with Molecular Oxygen Catalyzed by HPA‐5

et al. 2020

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“…The obtained 500 ml CS hydrolysate was used as the cultivation media with additional inorganic elements as stock solution and are shown as the following (g.L ‐1 ): NH 4 HCO 3, NaCl (0.005), MgCl 2 (0.01), NaCl 2 (0.1), K 2 HPO 4 (0.7), FeCl 2 (0.05), MnCl 2 (0.01), ZnCl 2 (0.05), H 3 BO 3 (0.01), CaCl 2 (0.01), Na 2 MoO 4 (0.01), CoCl 2 (0.025), MnSO 4 (0.03), CuSO 4 (0.01).…”

Section: Methodsmentioning

confidence: 99%

“…The chemical additions, especially the metal ions such as iron, nickel and NPs (NPs-Ni 0 ), have been found effective in enhancing the biohydrogen generation due to reasons such as stabilizing the activities of [FeFe], [NiFe] hydrogenase, facilitating the assemblage of [FeFe], [NiFe] clusters presented in the hydrogenase, and enhancing the electron transport in the cultivation media. 39,40 From the types of the metal centers, which are the active sites of the biocatalyst, the hydrogenase can be broadly classified into three different categories, namely, the [NiFe], [FeFe], and [Fe] classes, respectively. 41,42 Since the [Fe]-hydrogenases is generally restricted to some specific methanogens, we assume that hydrogenase in this work does not belong to this class.…”

Section: Effect Of Ni 2+ and Ni Nps On Biohydrogen Generationmentioning

confidence: 99%

Optimization of biohydrogen production using acid pretreated corn stover hydrolysate followed by nickel nanoparticle addition

et al. 2019

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Summary The dilute acid hydrolysis using corn stover (CS) to produce reducible sugars was optimized by the response surface methodology. The electron‐equivalent balances of the main metabolites during the dark fermentation (DF) using acid hydrolysate were investigated to identify the evolutions of the electron sinks over the course of DF. The additions of nickel ion and Ni0 nanoparticles (NPs) were found to effectively enhance the hydrogen production at experimental conditions. The optimal condition (HCl 2.5 wt%, hydrolyzing duration 105 minutes, pH=5, S/B=3.5, Ni0 NPs=10 mg/L‐1) was achieved with YH2/S reaching 1.18 (mol.mol‐1‐glucose). The YH2/S increased from 0.7 (mol.mol‐1‐glucose) to 1.18 (mol.mol‐1‐glucose) reaching 40% hydrogen yield increase when Ni0 NPs was added to the fermentation broth. Among the investigated significant soluble metabolites, the butyric acid was found to serve as the largest e‐sink in the electron‐equivalent balance. The additions of Ni0 NPs at low level (below 10 mg/L) were found to appreciably increase the hydrogen production. The increased pH and substrate to biomass ratio were found to skew the metabolic balance from hydrogen production to the biosynthesis (an increase of biomass). The proposed anaerobic digestion model with consideration of the inhibitory factors model presents a good agreement with the experimental data. The chemical addition such as nickel ions, Ni0 NPs was found to be a practical approach in enhancing biohydrogen production using CS acid hydrolysate as cultivation broth.

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“…The biological conversion of biomass through fermentative processes and the dissociation of water by microalgae (direct biophotolysis) or cyanobacteria (indirect biophotolysis) are widely discussed by [25][26][27][28][29][30][31][32]. Fermentative processes exploit food waste, industrial and forest residuals as useful resources for biofuel production [25], while biophotolysis consists of water-splitting reactions [33]. However, technologies are at the earlier research stage.…”

Section: Introductionmentioning

confidence: 99%

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

et al. 2020

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Innovative renewable routes are potentially able to sustain the transition to a decarbonized energy economy. Green synthetic fuels, including hydrogen and natural gas, are considered viable alternatives to fossil fuels. Indeed, they play a fundamental role in those sectors that are difficult to electrify (e.g., road mobility or high-heat industrial processes), are capable of mitigating problems related to flexibility and instantaneous balance of the electric grid, are suitable for large-size and long-term storage and can be transported through the gas network. This article is an overview of the overall supply chain, including production, transport, storage and end uses. Available fuel conversion technologies use renewable energy for the catalytic conversion of non-fossil feedstocks into hydrogen and syngas. We will show how relevant technologies involve thermochemical, electrochemical and photochemical processes. The syngas quality can be improved by catalytic CO and CO2 methanation reactions for the generation of synthetic natural gas. Finally, the produced gaseous fuels could follow several pathways for transport and lead to different final uses. Therefore, storage alternatives and gas interchangeability requirements for the safe injection of green fuels in the natural gas network and fuel cells are outlined. Nevertheless, the effects of gas quality on combustion emissions and safety are considered.

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A Review of the Enhancement of Bio-Hydrogen Generation by Chemicals Addition

Cited by 82 publications

References 140 publications

Kinetics of Triphase Extractive Oxidative Desulfurization of Benzothiophene with Molecular Oxygen Catalyzed by HPA‐5

Kinetics of Triphase Extractive Oxidative Desulfurization of Benzothiophene with Molecular Oxygen Catalyzed by HPA‐5

Optimization of biohydrogen production using acid pretreated corn stover hydrolysate followed by nickel nanoparticle addition

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

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