Thermodynamic and environmental analysis of integrated supercritical water gasification of coal for power and hydrogen production

Chen, Jingwei; Xu, Wenwen; Zhang, Feng; Zuo, Hongyan; Jiaqiang, E; Wei, Kexiang; Liao, Gaoliang; Fan, Yi

doi:10.1016/j.enconman.2019.111927

Cited by 70 publications

(7 citation statements)

References 45 publications

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“…The promotion caused the increase of the yield of the products. Methanation reactions (s21) and (s22) were exothermic and could be inhibited at high temperature . As a result, the fraction of H 2 increased and that of CH 4 decreased as the temperature increased.…”

Section: Resultsmentioning

confidence: 99%

Heat, Electricity, and Fuel Gas Ploy-Generation System on an Island based on Plastic Waste Gasification in Supercritical Water

Wang

Huo

et al. 2022

ACS Sustainable Chem. Eng.

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Plastic pollution in the ocean has become a serious threat to the health of marine life and even terrestrial life. It is also a challenge to transport it landside for recycling. A system to recycle the plastics in situ on an island was proposed with the aim to convert the plastics to fuel gases, such as H2, CH4, and CO. As one of the most abundant thermoset plastics in the ocean, epoxy plastics were recycled in this system. They were gasified in supercritical water driven by concentrated solar energy. A heat exchanger and turbine were used for electricity. The fuel gas could be stored in the gas tank at 4 MPa. The energy and exergy efficiency in this system were analyzed, and the effects of temperature, pressure, and feedstock concentration were discussed. The typical conditions were as follows: temperature 600 °C; pressure 25 MPa, and feedstock concentration 5 wt %. The mole fractions of these products were 48.13%, 22.97%, 0.84%, and 28.06%, respectively. Additionally, the energy and exergy efficiency were 51.75% and 45.22%, respectively.

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Section: Resultsmentioning

confidence: 99%

Heat, Electricity, and Fuel Gas Ploy-Generation System on an Island based on Plastic Waste Gasification in Supercritical Water

Wang

Huo

et al. 2022

ACS Sustainable Chem. Eng.

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“…However, POX is the most appropriate technology to produce H 2 from heavier feedstock such as heavy oil residues and coal [35]. In another process, coal is used as feedstock and the process is called coal gasification [36]. The coal gasification followed the same mechanism as POX, however, it becomes more expensive due to additional handling of un-reacted solid feedstock and a large amount of byproduct ash.…”

Section: (Ii) Partial Oxidationmentioning

confidence: 99%

Is the H2 economy realizable in the foreseeable future? Part I: H2 production methods

Naveed

Cindrella

Jose

et al. 2020

International Journal of Hydrogen Energy

199

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“…Alternatively, supercritical water gasification (SCWG) is an effective and clean conversion method of biomass to produce hydrogen-rich gas. The unique physicochemical properties of supercritical water ( T > 374 °C, P > 22.1 MPa) provide an excellent reaction environment for biomass or organic waste. , Its advantages have attracted much attention, and its utilization on the conversion of coal, biomass, and wastewater are widely studied. − However, it still has some problems that need to be solved, such as the formation of tar and char, which inhibit complete gasification and cause reactor plugging. , Besides, maintaining the high-pressure and high-temperature reaction environment requires a thick-wall reactor and special alloys, such as Inconel-625, 316 stainless steel, and Hastelloy C-276, , both of which can increase the construction costs and cause safety problems for SCWG operation. Therefore, reducing the reaction temperature and eliminating tar/char formation are crucial for the efficient and long-term operation of the SCWG process.…”

Section: Introductionmentioning

confidence: 99%

Supercritical Water Gasification of Lignin and Cellulose Catalyzed with Co-precipitated CeO₂–ZrO₂

Chen

Xie

et al. 2021

Energy Fuels

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Lignin and cellulose were gasified at 500 and 600 °C in supercritical water over co-precipitated CeO2–ZrO2 catalyst. The addition of CeO2–ZrO2 improved the gasification efficiency and hydrogen production, and the catalytic effect was more significant at lower temperatures. The H2 yield from cellulose gasification at 500 °C increased by over 2.5 times to 8.50 mol/kg with the presence of CeO2–ZrO2. The gas chromatography-mass spectrometry (GC-MS) analysis showed that the catalyst reduced the content of cyclopentenone and furan derivatives in the aqueous product but increased the content of refractory phenols. We characterized the fresh and the used catalysts with H2-temperature-programmed reduction (H2-TPR), X-ray diffraction (XRD), and scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS) analysis, showing that CeO2 was the main active component, which catalyzed gasification through redox reactions. ZrO2 enhanced the catalytic activity of CeO2 by lowering the reduction temperature in hydrogen, increasing the dispersion of CeO2, and facilitating H2 adsorption on the catalyst surface.

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Thermodynamic and environmental analysis of integrated supercritical water gasification of coal for power and hydrogen production

Cited by 70 publications

References 45 publications

Heat, Electricity, and Fuel Gas Ploy-Generation System on an Island based on Plastic Waste Gasification in Supercritical Water

Heat, Electricity, and Fuel Gas Ploy-Generation System on an Island based on Plastic Waste Gasification in Supercritical Water

Is the H2 economy realizable in the foreseeable future? Part I: H2 production methods

Supercritical Water Gasification of Lignin and Cellulose Catalyzed with Co-precipitated CeO₂–ZrO₂

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Thermodynamic and environmental analysis of integrated supercritical water gasification of coal for power and hydrogen production

Cited by 70 publications

References 45 publications

Heat, Electricity, and Fuel Gas Ploy-Generation System on an Island based on Plastic Waste Gasification in Supercritical Water

Heat, Electricity, and Fuel Gas Ploy-Generation System on an Island based on Plastic Waste Gasification in Supercritical Water

Is the H2 economy realizable in the foreseeable future? Part I: H2 production methods

Supercritical Water Gasification of Lignin and Cellulose Catalyzed with Co-precipitated CeO2–ZrO2

Contact Info

Product

Resources

About

Supercritical Water Gasification of Lignin and Cellulose Catalyzed with Co-precipitated CeO₂–ZrO₂