Heat integration of biomass co-firing in coal power plant

Po Chih Kuo, Hou Tsen Chen, Wei Wu

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Carbon dioxide from combustion of fossil is the major source of greenhouse gas emissions, which has recently been vigorously regulated worldwide. Oxy-coal combustion with carbon dioxide capture and sequestration (CCS) is among the promising clean coal technologies for reduction of CO2 emission. However, the efficiency of an oxy-coal plant is significantly lower than that of air-combustion counterpart due to energy penalties from air separation and CO2 compressor units. Concerning CO2 emission, oxy-co-combustion with biomass induces the CO2 reduction. For comparisons purposes, the study also evaluates the combustion impact on coal blending with biomass. To compensate the energy loss, pressurized combustion and heat integration framework are introduced in a 100 MWe-scale power plant constructed by Aspen Plus in this study. The results demonstrate that more thermal energy is retrieved from high-density gas at elevated pressure by increasing the temperature of waste flue gas and reducing the amount of steam extracted from the turbines. With heat integration configuration, the heat source from coal combustion is completely utilized to achieve higher efficiency.

Original languageEnglish
Pages (from-to)1756-1759
Number of pages4
JournalEnergy Procedia
Volume61
DOIs
Publication statusPublished - 2014 Jan 1
Event6th International Conference on Applied Energy, ICAE 2014 - Taipei, Taiwan
Duration: 2014 May 302014 Jun 2

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Boiler firing
Power plants
Biomass
Coal
Coal combustion
Carbon dioxide
Air
Thermal energy
Gas emissions
Flue gases
Greenhouse gases
Compressors
Energy dissipation
Turbines
Steam
Hot Temperature
Gases

All Science Journal Classification (ASJC) codes

  • Energy(all)

Cite this

Kuo, Po Chih ; Chen, Hou Tsen ; Wu, Wei. / Heat integration of biomass co-firing in coal power plant. In: Energy Procedia. 2014 ; Vol. 61. pp. 1756-1759.
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Heat integration of biomass co-firing in coal power plant. / Kuo, Po Chih; Chen, Hou Tsen; Wu, Wei.

In: Energy Procedia, Vol. 61, 01.01.2014, p. 1756-1759.

Research output: Contribution to journalConference article

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AU - Chen, Hou Tsen

AU - Wu, Wei

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N2 - Carbon dioxide from combustion of fossil is the major source of greenhouse gas emissions, which has recently been vigorously regulated worldwide. Oxy-coal combustion with carbon dioxide capture and sequestration (CCS) is among the promising clean coal technologies for reduction of CO2 emission. However, the efficiency of an oxy-coal plant is significantly lower than that of air-combustion counterpart due to energy penalties from air separation and CO2 compressor units. Concerning CO2 emission, oxy-co-combustion with biomass induces the CO2 reduction. For comparisons purposes, the study also evaluates the combustion impact on coal blending with biomass. To compensate the energy loss, pressurized combustion and heat integration framework are introduced in a 100 MWe-scale power plant constructed by Aspen Plus in this study. The results demonstrate that more thermal energy is retrieved from high-density gas at elevated pressure by increasing the temperature of waste flue gas and reducing the amount of steam extracted from the turbines. With heat integration configuration, the heat source from coal combustion is completely utilized to achieve higher efficiency.

AB - Carbon dioxide from combustion of fossil is the major source of greenhouse gas emissions, which has recently been vigorously regulated worldwide. Oxy-coal combustion with carbon dioxide capture and sequestration (CCS) is among the promising clean coal technologies for reduction of CO2 emission. However, the efficiency of an oxy-coal plant is significantly lower than that of air-combustion counterpart due to energy penalties from air separation and CO2 compressor units. Concerning CO2 emission, oxy-co-combustion with biomass induces the CO2 reduction. For comparisons purposes, the study also evaluates the combustion impact on coal blending with biomass. To compensate the energy loss, pressurized combustion and heat integration framework are introduced in a 100 MWe-scale power plant constructed by Aspen Plus in this study. The results demonstrate that more thermal energy is retrieved from high-density gas at elevated pressure by increasing the temperature of waste flue gas and reducing the amount of steam extracted from the turbines. With heat integration configuration, the heat source from coal combustion is completely utilized to achieve higher efficiency.

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