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NOx and SO2 emissions from municipal solid waste (MSW) combustion in CO2/O2 atmosphere

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  • Tang, Yuting
  • Ma, Xiaoqian
  • Lai, Zhiyi
  • Zhou, Daoxi
  • Lin, Hai
  • Chen, Yong

Abstract

The NOx and SO2 emissions from MSW combustion in CO2/O2 atmosphere were studied using a lab-scale electrically heated tube furnace. The shape, peaks location, and peaks values of NOx concentration curves all changed with temperature. In comparison, regarding these three characteristics of SO2 concentration curves, only peaks values were affected by temperature. The shape and peaks location of NOx and SO2 concentration curves changed with atmosphere indistinctively, but their peaks values, maximal average emissions, and the corresponding temperature were affected by atmosphere. Replacement of N2 by CO2 reduced NOx emission when the temperature was higher than or equal to 800 °C, but reduced SO2 emission when the temperature was lower than 1000 °C. At 1000 °C, some improvement measures, such as adding appropriate sorbents, were required in 80CO2/20O2 to achieve removal characteristics of SO2 and NOx simultaneously. The maximal desulphurization efficiency of CaO in 80CO2/20O2 atmosphere (34.4% at 800 °C) or limestone in 80N2/20O2 atmosphere (23.4% at 900 °C) was lower than that of limestone in 80CO2/20O2 atmosphere (43.3% at 1000 °C), indicating that direct sulfation in 80CO2/20O2 atmosphere was favourable for high desulphurization degree and consequently enabled better sorbent utilization. Besides, to obtain higher desulphurization efficiency at high temperature, Ca/S ratio should be increased.

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  • Tang, Yuting & Ma, Xiaoqian & Lai, Zhiyi & Zhou, Daoxi & Lin, Hai & Chen, Yong, 2012. "NOx and SO2 emissions from municipal solid waste (MSW) combustion in CO2/O2 atmosphere," Energy, Elsevier, vol. 40(1), pages 300-306.
    • Handle: RePEc:eee:energy:v:40:y:2012:i:1:p:300-306
    DOI: 10.1016/j.energy.2012.01.070
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    11. Zacharczuk, Wojciech & Andruszkiewicz, Artur & Tatarek, Andrzej & Alahmer, Ali & Alsaqoor, Sameh, 2021. "Effect of Ca-based additives on the capture of SO2 during combustion of pulverized lignite," Energy, Elsevier, vol. 231(C).
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    13. Wienchol, Paulina & Korus, Agnieszka & Szlęk, Andrzej & Ditaranto, Mario, 2022. "Thermogravimetric and kinetic study of thermal degradation of various types of municipal solid waste (MSW) under N2, CO2 and oxy-fuel conditions," Energy, Elsevier, vol. 248(C).
    14. Wei, Yunmei & Li, Jingyuan & Shi, Dezhi & Liu, Guotao & Zhao, Youcai & Shimaoka, Takayuki, 2017. "Environmental challenges impeding the composting of biodegradable municipal solid waste: A critical review," Resources, Conservation & Recycling, Elsevier, vol. 122(C), pages 51-65.
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    16. Wang, Yuelan & Ma, Zengyi & Shen, Yueliang & Tang, Yijun & Ni, Mingjiang & Chi, Yong & Yan, Jianhua & Cen, Kefa, 2016. "A power-saving control strategy for reducing the total pressure applied by the primary air fan of a coal-fired power plant," Applied Energy, Elsevier, vol. 175(C), pages 380-388.
    17. Jančauskas, Adolfas & Striūgas, Nerijus & Zakarauskas, Kęstutis & Skvorčinskienė, Raminta & Eimontas, Justinas & Buinevičius, Kęstutis, 2024. "Experimental investigation of sorted municipal solid wastes producer gas composition in an updraft fixed bed gasifier," Energy, Elsevier, vol. 289(C).
    18. von Bohnstein, Maximilian & Richter, Marcel & Graeser, Phillip & Schiemann, Martin & Ströhle, Jochen & Epple, Bernd, 2021. "3D CFD simulation of a 250 MWel oxy-fuel boiler with evaluation of heat radiation calculation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 137(C).
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