Hydrogen production by supercritical water gasification of food waste using nickel and alkali catalysts

Amuzu-Sefordzi, Basil; Huang, Jiung-Yao; Gong, Miao

doi:10.2495/eq140281

Cited by 10 publications

(6 citation statements)

References 34 publications

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“…It was proposed that deactivation of La promoted Ni/Al 2 O 3 catalysts is slow as compared to bare Ni/Al 2 O 3 due to anti‐carbon deposition property of La‐Ni/Al 2 O 3 that resulted in better gasification efficiency after the several use. Nickel has also been used in combination of different alkali catalyst such as NaOH, KOH, Ca(OH) 2 , Na 2 CO 3 , NaHCO 3 , and K 2 CO 3 (Amuzu‐Sefordzi et al, 2014) and it was shown that the combination work in the sequence to produce hydrogen; Ni‐K 2 CO 3 > Ni‐NaOH > Ni‐KOH > Ni‐NaHCO 3 > Ni > Ca(OH) 2 > Ni‐Na 2 CO 3 > No catalyst. Results also showed that CO 2 was the main gaseous product.…”

Section: Syngas From Mixed Food Wastementioning

confidence: 99%

“…Results also showed that CO 2 was the main gaseous product. Another study used a few commercial catalysts namely, FeCl 3 , K 2 CO 3 , activated carbon, and KOH (Amuzu-Sefordzi et al, 2014). The results showed that at optimal conditions (500 C temperature, 2 wt% feedstock concentration, and 60 min residence time), the highest hydrogen yield was achieved with KOH catalyst.…”

Section: Supercritical Steam Gasificationmentioning

confidence: 99%

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Syngas production from thermochemical conversion of mixed food waste: A review

Yadav

Katiyar

Mesfer

et al. 2023

WIREs Energy & Environment

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Lately, the generation of leftover food or cooked food waste has turned out to be a critical issue and its disposal in an environmental friendly way has been a challenge. This food waste is being sent for incineration and landfilling which results in a significant contribution to environmental pollution. Therefore, alternative methods for processing food waste in an environmentally benign way have been explored by many researchers. Thermochemical methods are one of those methods and are found to be promising for not only handling the food waste in an ecological way but also producing renewable energy efficiently in the form of bio-oil and syngas along with a solid byproduct, that is, biochar. However, the generation of syngas is favored by only two thermochemical processes, fast pyrolysis, and gasification. Some derived processes such as co-pyrolysis, and co-gasification can also generate syngas. All these

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Section: Syngas From Mixed Food Wastementioning

confidence: 99%

Section: Supercritical Steam Gasificationmentioning

confidence: 99%

Syngas production from thermochemical conversion of mixed food waste: A review

Yadav

Katiyar

Mesfer

et al. 2023

WIREs Energy & 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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“…Nickel (Ni) has been reported as it can enhance yield of hydrogen via water gasshifted reaction [7][8][9][10]. Furthermore, there have many of other metals investigated such as platinum (Pt) and ruthenium (Ru).…”

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confidence: 99%

Performance of CNT Modified by Ni With Ru as Promoter in Hydrothermal Gasification of Glucose

Changkiendee

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Supercritical water gasification (SCWG) is a promising way to produce energy from biomass in term of gaseous product. In this study, glucose was gasified in supercritical water in a batch reactor at temperature of 400 °C and pressure of 25 MPa. Nickel supported-single walled carbon nanotube (Ni/SWCNT), Ni/SWCNT promoted with ruthenium (Ru-Ni/SWCNT), and single walled carbon nanotube (SWCNT) were employed to study the effect of each catalyst on gasification product. Concentration of glucose was 5 wt%. Ratio of catalyst to glucose was 3:10 by weight. Reaction time was varied from 15 to 60 min. Energy dispersive X-ray spectroscopy (EDX), Brunauer–Emmett–Teller (BET) analysis, and X-ray diffraction (XRD) were used to confirm the catalyst synthesis achievement. After SCWG, gaseous, liquid, and solid (char) products were observed. Ni/SWCNT and Ru-Ni/SWCNT highly increased gas yield when compared to the conditions of SWCNT and non-catalytic gasification. However, hydrogen yield slightly increased with SWCNT. Methane production was also enhanced by adding metal catalysts, which was attributed that water-gas shift reaction and methanation play an important roles in gaseous phase reaction. Interestingly, it was found that an important period of reaction took place in the first 15 min. At this stage, glucose rapidly decomposed into several intermediates including furfural, 5-(hydroxymethyl)furfural, and other liquid products. However, char was rapidly produced with consumption of furfural and 5-(hydroxymethyl)furfural, resulting in a decrease in hydrogen and methane yield with a longer reaction time.

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Hydrogen production by supercritical water gasification of food waste using nickel and alkali catalysts

Cited by 10 publications

References 34 publications

Syngas production from thermochemical conversion of mixed food waste: A review

Syngas production from thermochemical conversion of mixed food waste: A review

Ruthenium modified defatted spent coffee catalysts for supercapacitor and methanolysis application

Performance of CNT Modified by Ni With Ru as Promoter in Hydrothermal Gasification of Glucose

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