Comprehensive evaluation of an ionic liquid based deep purification process for NH3-containing industrial gas

Guoxiong Zhan; Fei Cao; Jianjun Chen; Zhen Chen; Yuanmeng Duan; Fei Chang; Shaojuan Zeng; Yinge Bai; Zengxi Li; Xiangping Zhang; Junhua Li

doi:10.1016/j.jes.2022.12.015

Comprehensive evaluation of an ionic liquid based deep purification process for NH₃-containing industrial gas

J Environ Sci (China). 2024 Feb:136:698-708. doi: 10.1016/j.jes.2022.12.015. Epub 2022 Dec 20.

Authors

Guoxiong Zhan¹, Fei Cao², Jianjun Chen¹, Zhen Chen¹, Yuanmeng Duan³, Fei Chang³, Shaojuan Zeng⁴, Yinge Bai⁴, Zengxi Li⁵, Xiangping Zhang⁶, Junhua Li⁷

Affiliations

¹ State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
² Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China.
³ Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
⁴ Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; College of Chemical and Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
⁵ Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China; College of Chemical and Engineering, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: lizengxi@ucas.ac.cn.
⁶ Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; College of Chemical and Engineering, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: xpzhang@ipe.ac.cn.
⁷ State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: lijunhua@tsinghua.edu.cn.

PMID: 37923478
DOI: 10.1016/j.jes.2022.12.015

Abstract

Ammonia (NH₃) emission has caused serious environment issues and aroused worldwide concern. The emerging ionic liquid (IL) provides a greener way to efficiently capture NH₃. This paper provides rigorous process simulation, optimization and assessment for a novel NH₃ deep purification process using IL. The process was designed and investigated by simulation and optimization using ionic liquid [C₄im][NTF₂] as absorbent. Three objective functions, total purification cost (TPC), total process CO₂ emission (TPCOE) and thermal efficiency (η_eff) were employed to optimize the absorption process. Process simulation and optimization results indicate that at same purification standard and recovery rate, the novel process can achieve lower cost and CO₂ emission compared to benchmark process. After process optimization, the optimal functions can achieve 0.02726 $/Nm³ (TPC), 311.27 kg CO₂/hr (TPCOE), and 52.21% (η_eff) for enhanced process. Moreover, compared with conventional process, novel process could decrease over $ 3 million of purification cost and 10000 tons of CO₂ emission during the life cycle. The results provide a novel strategy and guidance for deep purification of NH₃ capture.

Keywords: Capture Process; Deep purification; Ionic Liquid; NH(3); Process Optimization; Process Simulation.

MeSH terms

Ammonia
Carbon Dioxide
Computer Simulation
Ionic Liquids*

Substances

Ionic Liquids
Carbon Dioxide
Ammonia