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Application of the exergy method to the environmental impact estimation: The nitric acid production as a case study

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  • Kirova-Yordanova, Zornitza

Abstract

In this work the exergy method is used to compare various methods for removal of NOx from waste (tail) gas released into the atmosphere from nitric acid production plants with respect to their overall environmental impact. Three basic methods for NOx abatement are analysed: selective catalytic reduction (SCR), non-selective catalytic reduction (NSCR) and extended absorption. The positive and negative effects and the net effect from the NOx abatement are calculated. The following exergy-based indicators are used for comparing the energy efficiency and the environmental impact of different treatment processes as a result from pollutants removal: reduction of the exergy of the emissions from the whole process route (ammonia and nitric acid production units); exergy of the additional emissions, arising as a result of the treatment process; total net reduction of the exergy consumption, Cumulative Energy Consumption (CEnC) and Cumulative Exergy Consumption (CExC) of natural resources as a result of the waste flows treatment.

Suggested Citation

  • Kirova-Yordanova, Zornitza, 2011. "Application of the exergy method to the environmental impact estimation: The nitric acid production as a case study," Energy, Elsevier, vol. 36(6), pages 3733-3744.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:6:p:3733-3744
    DOI: 10.1016/j.energy.2010.12.039
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    References listed on IDEAS

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    1. Kirova-Yordanova, Zornitza, 2010. "Application of the exergy method to environmental impact estimation: The ammonium nitrate production as a case study," Energy, Elsevier, vol. 35(8), pages 3221-3229.
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    Cited by:

    1. López-Sabirón, Ana M. & Royo, Patricia & Ferreira, Victor J. & Aranda-Usón, Alfonso & Ferreira, Germán, 2014. "Carbon footprint of a thermal energy storage system using phase change materials for industrial energy recovery to reduce the fossil fuel consumption," Applied Energy, Elsevier, vol. 135(C), pages 616-624.
    2. Flórez-Orrego, Daniel & de Oliveira Junior, Silvio, 2016. "On the efficiency, exergy costs and CO2 emission cost allocation for an integrated syngas and ammonia production plant," Energy, Elsevier, vol. 117(P2), pages 341-360.
    3. Kirova-Yordanova, Zornitza, 2017. "Exergy-based estimation and comparison of urea and ammonium nitrate production efficiency and environmental impact," Energy, Elsevier, vol. 140(P1), pages 158-169.

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