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Pilot‐scale parametric evaluation of concentrated piperazine for CO 2 capture at an Australian coal‐fired power station

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  • Ashleigh Cousins
  • Sanger Huang
  • Aaron Cottrell
  • Paul H.M. Feron
  • Eric Chen
  • Gary T. Rochelle

Abstract

Concentrated piperazine (PZ) is a promising new solvent under consideration for post‐combustion capture (PCC) of CO 2 . A solution of 8 molal PZ was recently evaluated at the Tarong CO 2 capture pilot plant in Australia. Initial operation involved evaluation of different operating conditions at the plant to determine the minimum energy conditions for this solvent. Comparison was made to results achieved previously at the same pilot plant with 30 wt% monoethanolamine (MEA). Regeneration energy requirements achieved with concentrated PZ were consistently lower than those achieved with MEA. The lowest regeneration energy for PZ at the pilot plant (2.9 MJ/kgCO 2 ) was roughly 15% lower than the best result predicted for MEA. Inter‐cooling located at the center of the absorber column was also evaluated for the concentrated PZ solvent. The benefit of inter‐cooling was found to depend on the operating conditions of the plant, with operation at higher liquid‐to‐gas (L/G) ratios showing a more pronounced effect. For an L/G ratio of 3.3 kg/kg, inter‐cooling was found to lower the regeneration energy required for PZ by approximately 10%.

Suggested Citation

  • Ashleigh Cousins & Sanger Huang & Aaron Cottrell & Paul H.M. Feron & Eric Chen & Gary T. Rochelle, 2015. "Pilot‐scale parametric evaluation of concentrated piperazine for CO 2 capture at an Australian coal‐fired power station," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 5(1), pages 7-16, February.
    • Handle: RePEc:wly:greenh:v:5:y:2015:i:1:p:7-16
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    File URL: http://hdl.handle.net/10.1002/ghg.1462
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    1. Ashleigh Cousins & Paul Nielsen & Sanger Huang & Aaron Cottrell & Eric Chen & Gary T Rochelle & Paul H M Feron, 2015. "Pilot‐scale evaluation of concentrated piperazine for CO 2 capture at an Australian coal‐fired power station: duration experiments," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 5(4), pages 363-373, August.
    2. Paul H.M. Feron & Ashleigh Cousins & Shiwang Gao & Lianbo Liu & Jinyi Wang & Shiqing Wang & Hongwei Niu & Hai Yu & Kangkang Li & Aaron Cottrell, 2017. "Experimental performance assessment of a mono‐ethanolamine‐based post‐combustion CO 2 ‐capture at a coal‐fired power station in China," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 7(3), pages 486-499, June.
    3. Liu, Fei & Fang, Mengxiang & Dong, Wenfeng & Wang, Tao & Xia, Zhixiang & Wang, Qinhui & Luo, Zhongyang, 2019. "Carbon dioxide absorption in aqueous alkanolamine blends for biphasic solvents screening and evaluation," Applied Energy, Elsevier, vol. 233, pages 468-477.

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