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Co-production of power and urea from coal with CO2 capture: performance assessment

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Abstract

Coal-based power plants are largest emitter of CO2 as a single sector. To use fossil fuels (including coal), CO2 capture and storage is a visible option. But large energy requirement for this process and risk associated with storage of CO2 demand alternative solutions including recycling of captured CO2. In this paper, a co-production of power and urea is proposed using coal with captured CO2. Detailed ASPEN Plus® model is developed for this plant. As shift reaction for producing H2 has significant effect on output parameters, analysis is done for two different values of shift reaction, i.e., 90 and 95 % conversion. Plant consumes substantial auxiliary power (~19 % for the base case). Auxiliary power becomes a minimum for about 25 % captured CO2 utilization for 95 % shift conversion. An economy factor is also defined to estimate the economic advantage of utilizing captured CO2. Results show that economic advantage is obtained for CO2 utilization beyond ~5 % for 95 % water gas shift reaction and it is beyond ~10 % for a 90 % shift reaction.

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Acknowledgments

Kuntal Jana acknowledges to Council of Scientific and Industrial Research (CSIR-New Delhi, India) for awarding Senior Research Fellowship for this research toward PhD.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Jadavpur University, Kolkata, 700032, India

    Archishman Bose, Kuntal Jana, Debrudra Mitra & Sudipta De

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  1. Archishman Bose
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  2. Kuntal Jana
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  3. Debrudra Mitra
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  4. Sudipta De
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Correspondence to Sudipta De.

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Bose, A., Jana, K., Mitra, D. et al. Co-production of power and urea from coal with CO2 capture: performance assessment. Clean Techn Environ Policy 17, 1271–1280 (2015). https://doi.org/10.1007/s10098-015-0960-7

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  • DOI: https://doi.org/10.1007/s10098-015-0960-7

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