Combination of thermochemical recuperative coal gasification cycle and fuel cell for power generation

Kuchonthara, Prapan; Bhattacharya, Sankar; Tsutsumi, Atsushi

doi:10.1016/j.fuel.2004.08.024

Cited by 90 publications

(38 citation statements)

References 8 publications

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“…The carbon content increased and the oxygen content decreased with the increase in retention time which resulted in SR with a high HHV. The HHV of SRs from hydrothermal liquefaction of cypress at the high temperatures (260, 280, and 300 °C) were 23.4 to 26.3 MJ/kg, much close to that of the Xuzhou coal (23.22 MJ/kg) [28] and the Loy yang coal (26.4 MJ/kg) [29]. These values demonstrate that the SRs have potential as the solid fuels to replace coal.…”

Section: Elemental Analysis and Higher Heating Value Of Solid Residuesmentioning

confidence: 54%

Understanding the Mechanism of Cypress Liquefaction in Hot-Compressed Water through Characterization of Solid Residues

Liu

Yang

et al. 2013

Energies

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Abstract:The mechanism of hydrothermal liquefaction of cypress was investigated by examining the effects of temperature and retention time on the characteristics of the solid residues remaining after liquefaction. The solid residues were divided into acid-soluble and acid-insoluble residues. Results showed the polymerization reactions also mainly occurred at low temperatures. The reactive fragments transformed into acid-insoluble solid residue in the form of carbon and oxygen through polymerization reactions. The process of cellulose degradation consists of two steps: an initial hydrolysis of the more solvent-accessible amorphous region and a later hydrolytic attack on the crystalline portion. Hemicelluloses were decomposed into small compounds during the initial stage of the cypress liquefaction process, and then these compounds may rearrange through polymerization to form acid-insoluble solid residues above 240 °C. The higher heating value of the solid residues obtained from liquefaction at 260-300 °C was 23.4-26.3 MJ/kg, indicating that they were suitable for combustion as a solid fuel.

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Section: Elemental Analysis and Higher Heating Value Of Solid Residuesmentioning

confidence: 54%

Understanding the Mechanism of Cypress Liquefaction in Hot-Compressed Water through Characterization of Solid Residues

Liu

Yang

et al. 2013

Energies

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“…This simulation package has been used for modelling coal and biomass power generation systems in many research projects [13][14][15][16][17][18][19][20][21][22][23]. It is a steady state chemical process simulator, which was developed at Massachusetts Institute of Technology (MIT) for the US DOE, to evaluate synthetic fuel technologies.…”

Section: Process Simulation Softwarementioning

confidence: 99%

The effect of air preheating in a biomass CFB gasifier using ASPEN Plus simulation

Doherty¹,

Reynolds²,

Kennedy³

2009

Biomass and Bioenergy

259

113

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“…The generated syngas is converted into electrical energy by subsequent combustion in a gas turbine [1] or electrochemical reaction in a fuel cell. [2][3][4][5] In particular, coupling a solid oxide fuel cell (SOFC) to a gasification process increases the overall cycle efficiency from 39.5 to 45.0 pct [6] or even greater when utilizing anode gas recycling. [7] The fuel cell (FC) emits low levels of NO X and SO X and facilitates the separation of CO 2 from the exhaust stream for eventual sequestration.…”

Section: Introductionmentioning

confidence: 99%

Performance Impact Associated with Ni-Based SOFCs Fueled with Higher Hydrocarbon-Doped Coal Syngas

Hackett

Gerdes

Chen

et al. 2015

Metallurgical and Materials Transactions E

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Energy generation strategies demonstrating high efficiency and fuel flexibility are desirable in the contemporary energy market. When integrated with a gasification process, a solid oxide fuel cell (SOFC) can produce electricity at efficiencies exceeding 50 pct by consuming fuels such as coal, biomass, municipal solid waste, or other opportunity wastes. The synthesis gas derived from such fuel may contain trace species (including arsenic, lead, cadmium, mercury, phosphorus, sulfur, and tars) and low concentration organic species that adversely affect the SOFC performance. This work demonstrates the impact of exposure of the hydrocarbons ethylene, benzene, and naphthalene at various concentrations. The cell performance degradation rate is determined for tests exceeding 500 hours at 1073 K (800°C). Cell performance is evaluated during operation with electrochemical impedance spectroscopy, and exposed samples are postoperationally analyzed by scanning electron microscopy/energy dispersive spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. The short-term performance is modeled to predict performances to the desired 40,000-hours operational lifetime for SOFCs. Possible hydrocarbon interactions with the nickel anode are postulated, and acceptable hydrocarbon exposure limits are discussed.

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Combination of thermochemical recuperative coal gasification cycle and fuel cell for power generation

Cited by 90 publications

References 8 publications

Understanding the Mechanism of Cypress Liquefaction in Hot-Compressed Water through Characterization of Solid Residues

Understanding the Mechanism of Cypress Liquefaction in Hot-Compressed Water through Characterization of Solid Residues

The effect of air preheating in a biomass CFB gasifier using ASPEN Plus simulation

Performance Impact Associated with Ni-Based SOFCs Fueled with Higher Hydrocarbon-Doped Coal Syngas

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