Sustainable hydrogen production options from food wastes

Duman, Gözde; Akarsu, Koray; Yilmazer, Alper; Gundogdu, Tugba Keskin; Azbar, Nuri; Yanık, Jale

doi:10.1016/j.ijhydene.2017.12.146

Cited by 64 publications

(21 citation statements)

References 45 publications

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“…In such favorable conditions, it has been reported that the solubilized molecules, especially alcohols, mono-and polyphenols undergo a polymerization reaction, characterized with a reduction in the total organic carbon (TOC) content present in the final process water, the production of syngas (light hydrocarbons, hydrogen and carbon oxides) and along with significant amount of tarry condensate (Gai et al, 2016;García-Jarana et al, 2014). In a recent study, Duman et al (2018), studied the carbonization of food waste for the production of syngas (H2 and CH4). They pointed out that the addition of alkali catalyst, i.e., K2CO3, increased in the subcritical water basicity which enhanced the formation of low molecular weight compounds.…”

Section: Mechanism Of the Omww Hydrothermal Carbonizationmentioning

confidence: 99%

Olive mill wastewater: From a pollutant to green fuels, agricultural and water source and bio-fertilizer – Hydrothermal carbonization

Azzaz

Jeguirim

Kinigopoulou³

et al. 2020

Science of The Total Environment

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Hydrothermal carbonization (HTC) is considered as a promising technique for wastes conversion into carbon rich materials for various energetic, environmental and agricultural applications. In this work, the HTC of olive mill wastewater (OMWW) was investigated at different temperatures (180 -220°C) and both, the solid (i.e., hydrochars) and the final process liquid derived from the thermal conversion process were deeply analyzed. Results showed that the solid yield was affected by the temperature, i.e., decrease from 57% to 25% for temperatures of 180°C and 220°C, respectively. Furthermore, the hydrochars presented an increasing fixed carbon percentage with the increase of the carbonization temperature, suggesting that decarboxylation is the main reaction driving the HTC process. The decrease in the O/C ratio promoted an increase of the high heating value (HHV) by 32% for hydrochar prepared at 220°C. The process liquids were sampled and their organic contents were analyzed using GC-MS technique. Acids, alcohols, phenols and sugar derivatives were detected and their concentrations varied with carbonization temperatures. The assessment of the physico-chemical properties of the generated HTC by-products suggested the possible application of the hydrochars for energetic insights while the liquid fraction could be practical for in agricultural field.

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Section: Mechanism Of the Omww Hydrothermal Carbonizationmentioning

confidence: 99%

Olive mill wastewater: From a pollutant to green fuels, agricultural and water source and bio-fertilizer – Hydrothermal carbonization

Azzaz

Jeguirim

Kinigopoulou³

et al. 2020

Science of The Total Environment

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“…In the past years, energy source was obtained only from animal feces, but nowadays, energy can be obtained from all organic wastes with the developing technology. There are studies in the literature on the usability of this organic waste 24–28 . Coffee is widely consumed in the World and thus, there is plenty of coffee waste.…”

Section: Introductionmentioning

confidence: 99%

“…There are studies in the literature on the usability of this organic waste. [24][25][26][27][28] Coffee is widely consumed in the World and thus, there is plenty of coffee waste. The aim of this study is to synthesize a catalyst using defatted spent coffee ground (DSCG).…”

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confidence: 99%

Ruthenium modified defatted spent coffee catalysts for supercapacitor and methanolysis application

et al. 2021

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Currently, a novel green material, defatted spent coffee ground (DSCG), is employed as a support to prepare DSCG supported Ru (DSCG‐Ru) material. DSCG and DSCG‐Ru materials are characterized by advanced surface analytical techniques such as N2 adsorption‐desorption, X‐ray diffraction, X‐ray photoelectron spectroscopy, and H2‐temperature‐programmed reduction. Characterization results revealed that DSCG‐Ru was prepared successfully. First, DSCG‐Ru is prepared at varying Ru contents on deoiled coffee waste and hydrogen production experiments are performed by the methanolysis of sodium borohydride on the DSCG‐Ru catalysts. It is observed that optimum conditions for the catalyst preparation are examined on the 10% Ru containing DSCG‐Ru catalysts and found as 10% Ru, 300°C, and 60 minutes. DSCG catalyst containing 10% Ru completed the methanolysis reaction in 1.5 minutes. Capacitive measurements to investigate the supercapacitor property of DSCG‐Ru catalysts prepared at optimum conditions 10% Ru, 300°C, and 60 minutes is investigated by cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge‐discharge measurements. Results revealed that gravimetric capacitance of the electrode at a current density is found as of 0.5 A/g and 43 F/g, greater than the literature values. DSCG‐Ru, green novel supported Ru catalyst, has a dual promising performance in hydrogen production and supercapacitor measurements.

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“…2 This issue is not relevant for biomass due to the fact that the generated fuels from biomass like ethanol and biodiesel can be utilized at any moment. [8][9][10][11] In countries with a plentiful quantity of geothermal energy, hydrogen production based on geothermal sources is becoming a primary energy sector. 3,4 Additionally, batteries cannot be considered as an applicable option on the condition of present technologies due to their actual restricted capacity.…”

Section: Introductionmentioning

confidence: 99%

“…The hydrogen production based on renewable resources would be a favorable path toward a prospective hydrogen economy due to cost-effective and clean approach for producing hydrogen. [8][9][10][11] In countries with a plentiful quantity of geothermal energy, hydrogen production based on geothermal sources is becoming a primary energy sector. 12,13 In this way, plenty of endeavors have focused on scientific research, technological development, and employment of modernization in hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

Geothermal energy use in hydrogen production: A review

et al. 2019

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Summary The major logics resulting in hydrogen production can be mentioned as fossil fuel depletion and climate change. In this way, hydrogen is produced with the help of numerous processes based on traditional and alternative energy resources like coal, natural gas, wind, solar, biomass, and geothermal energy. Over the past decade, the attention of research institutions and industry has been drawn to hydrogen, inspired by developments in renewable energies. Hydrogen production can be considered as an exceptional choice to make complete utilization of the renewable energy. Among diverse technologies, hydrogen production based on geothermal energy offers great promise. In this paper, initially a concise summary of present and advancing hydrogen production technologies is presented, and secondarily a comprehensive review of research associated with hydrogen production based on geothermal energy is provided. Thirdly, the process descriptions of geothermal‐assisted hydrogen production coupled with its technical, economic, and environmental aspects are addressed. Finally, comparative assessments of costs and environmental aspects related to hydrogen production based on different energy sources have been performed. In accordance with the results, the geothermal‐assisted hydrogen production cost based on electrolysis is competitively lower than other sources like wind, solar thermal coupled with natural gas, solar PV, and grid. Also, the same behavior can be seen for geothermal‐assisted hydrogen production cost based on thermochemical process.

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Sustainable hydrogen production options from food wastes

Cited by 64 publications

References 45 publications

Olive mill wastewater: From a pollutant to green fuels, agricultural and water source and bio-fertilizer – Hydrothermal carbonization

Olive mill wastewater: From a pollutant to green fuels, agricultural and water source and bio-fertilizer – Hydrothermal carbonization

Ruthenium modified defatted spent coffee catalysts for supercapacitor and methanolysis application

Geothermal energy use in hydrogen production: A review

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