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Decarbonised coal energy system advancement through CO2 utilisation and polygeneration

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Abstract

Development of clean coal technology is highly envisaged to mitigate the CO2 emission level whilst meeting the rising global energy demands which require highly efficient and economically compelling technology. Integrated gasification combined cycle (IGCC) with carbon capture and storage (CCS) system is highly efficient and cleaner compared to the conventional coal-fired power plant. In this study, an alternative process scheme for IGCC system has been proposed, which encompasses the reuse of CO2 from the flue gas of gas turbine into syngas generation, followed by methanol synthesis. The thermodynamic efficiency and economic potential are evaluated and compared for these two systems. The performances of the systems have been enhanced through systematic energy integration strategies. It has been found that the thermodynamic and economic feasibilities have attained significant improvement through the realisation of a suitably balanced polygeneration scheme. The economic potential can be enhanced from negative impact to 317 M€/y (3.6 €/GJ). The results have demonstrated promising prospects of employing CO2 reuse technology into IGCC system, as an alternative to CCS system.

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Abbreviations

CC:

Annual capital cost

EP:

Economic potential

H:

Total number of operating hours per year

LHV:

Lower heating value (MW)

NP:

Total number of products

OC:

Annual operating cost

p i :

Unit price of product i

r i :

Production rate of product i

Θ:

Scale factor, Eq. 1

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Acknowledgment

The authors would like to express their gratitude to The University of Manchester Alumni Fund and Process Integration Research Consortium for financial aid to support this research.

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Authors and Affiliations

  1. Centre for Process Integration, School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, M13 9PL, UK

    Kok Siew Ng & Nan Zhang

  2. Centre for Environmental Strategy, University of Surrey, Guildford, GU2 7XH, UK

    Jhuma Sadhukhan

Authors
  1. Kok Siew Ng
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  2. Nan Zhang
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  3. Jhuma Sadhukhan
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Correspondence to Jhuma Sadhukhan.

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Ng, K.S., Zhang, N. & Sadhukhan, J. Decarbonised coal energy system advancement through CO2 utilisation and polygeneration. Clean Techn Environ Policy 14, 443–451 (2012). https://doi.org/10.1007/s10098-011-0437-2

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  • DOI: https://doi.org/10.1007/s10098-011-0437-2

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