Techno‐Economic Analysis of a Coal Staged Conversion Polygeneration System for Power and Chemicals Production

Li, Kaikun; Wang, Qinhui; Shaikh, Abdul Rahim; Xie, Guo-Jun; Luo, Zhongyang

doi:10.1002/ceat.201800338

Cited by 12 publications

(4 citation statements)

References 38 publications

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“…The concentration of H 2 S-rich gas and the clean gas is employed by Field et al [32]. Then, to generate elemental sulfur, acid gas-rich H 2 S is fed to a Claus/SCOT plant [34]. The Claus process allows for a split-flow configuration with a portion of the H 2 S supply going to the furnace and the rest bypassing it to mix in the first catalytic reactor.…”

Section: Selexol Unitmentioning

confidence: 99%

Techno-Economic Analysis of Hydrogen and Electricity Production by Biomass Calcium Looping Gasification

et al. 2022

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Combined cycle, biomass calcium looping gasification is proposed for a hydrogen and electricity production (CLGCC–H) system. The process simulation Aspen Plus is used to conduct techno-economic analysis of the CLGCC–H system. The appropriate detailed models are set up for the proposed system. Furthermore, a dual fluidized bed is optimized for hydrogen production at 700 °C and 12 bar. For comparison, calcium looping gasification with the combined cycle for electricity (CLGCC) is selected with the same parameters. The system exergy and energy efficiency of CLGCC–H reached as high as 60.79% and 64.75%, while the CLGCC system had 51.22% and 54.19%. The IRR and payback period of the CLGCC–H system, based on economic data, are calculated as 17.43% and 7.35 years, respectively. However, the CLGCC system has an IRR of 11.45% and a payback period of 9.99 years, respectively. The results show that the calcium looping gasification-based hydrogen and electricity coproduction system has a promising market prospect in the near future.

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Section: Selexol Unitmentioning

confidence: 99%

Techno-Economic Analysis of Hydrogen and Electricity Production by Biomass Calcium Looping Gasification

et al. 2022

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“…As shown in Figure 3a, the gasification process can be hypothetically decomposed into two sequential sub-processes: first, the reactants are heated by hot products to the reaction temperature T; second, the fuel reacts with pure oxygen at a constant temperature. The exergy balance is given by Equation (1), where Ichem, Iheating, and IQloss are exergy destructions caused by the gasification reactions, reactant heating, and heat loss in the gasifier, respectively: (2) The heat transfer from hot syngas to steam leads to exergy loss, Iheating, and the exergy balance is presented in Equation (5), where IQloss represents the exergy loss due to heat dissipation to the atmosphere.…”

Section: Physical-chemical Process Exergy Analysismentioning

confidence: 99%

“…Coal-based polygeneration, which integrates chemical production and power generation, is a promising strategy for clean coal utilization [1,2]. Today's coal-based polygeneration systems can potentially be significantly improved by systematic optimization [3,4] and by applying advanced technical approaches [5][6][7]. For example, in a methanol-power polygeneration system, the system comprises coal gasification, methanol synthesis, and combined cycle power generation.…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production

Zhang

Yang

et al. 2021

Molecules

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This paper quantifies the exergy losses of coal-based series polygeneration systems and evaluates the potential efficiency improvements that can be realized by applying advanced technologies for gasification, methanol synthesis, and combined cycle power generation. Exergy analysis identified exergy losses and their associated causes from chemical and physical processes. A new indicator was defined to evaluate the potential gain from minimizing exergy losses caused by physical processes—the degree of perfection of the system’s thermodynamic performance. The influences of a variety of advanced technical solutions on exergy improvement were analyzed and compared. It was found that the overall exergy loss of a series polygeneration system can be reduced significantly, from 57.4% to 48.9%, by applying all the advanced technologies selected. For gasification, four advanced technologies were evaluated, and the largest reduction in exergy loss (about 2.5 percentage points) was contributed by hot gas cleaning, followed by ion transport membrane technology (1.5 percentage points), slurry pre-heating (0.91 percentage points), and syngas heat recovery (0.6 percentage points). For methanol synthesis, partial shift technology reduced the overall exergy loss by about 1.4 percentage points. For power generation, using a G-class gas turbine decreased the overall exergy loss by about 1.6 percentage points.

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“…So, it is urgent to exploit new technologies to utilize lignite more cleanly and efficiently. Our research group proposed a novel coal pyrolysis-based staged conversion technology [3][4][5]. Lignite is heated by the circulating ash from a circulating fluidized-bed (CFB) boiler and pyrolyzed into char, gas, and tar in a pyrolyzer [6].…”

Section: Introductionmentioning

confidence: 99%

Effects of CO Atmosphere on the Pyrolysis of a Typical Lignite

Wang

Guo

et al. 2020

Chem Eng & Technol

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To reveal the effect mechanism of CO atmosphere on coal pyrolysis, a study on raw and demineralized lignite was carried out in a horizontal tube furnace under N2 and CO/N2 atmosphere. CO had a negligible effect on the char yield at low temperatures, whereas it enhances the char yield at temperatures higher than 550 °C. The release of tar was higher in the presence of CO above 450 °C because of more free radicals, which reduced low‐temperature crosslinking, and higher selectivity of hydroxyl groups to phenols in the CO‐containing atmosphere. The yields of CO2 and H2 increased, water and CO yields decreased under CO/N2 atmosphere. Light hydrocarbon gases were not affected by changing the reaction atmosphere. The difference between product yields from raw and demineralized coal confirmed that the catalysis of inherent minerals had a great catalytic effect on the water‐gas shift reaction and Boudouard reaction.

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Techno‐Economic Analysis of a Coal Staged Conversion Polygeneration System for Power and Chemicals Production

Cited by 12 publications

References 38 publications

Techno-Economic Analysis of Hydrogen and Electricity Production by Biomass Calcium Looping Gasification

Techno-Economic Analysis of Hydrogen and Electricity Production by Biomass Calcium Looping Gasification

Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production

Effects of CO Atmosphere on the Pyrolysis of a Typical Lignite

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