Climate Change Research ›› 2021, Vol. 17 ›› Issue (1): 70-78.doi: 10.12006/j.issn.1673-1719.2019.277

• Greenhouse Gas Emissions • Previous Articles     Next Articles

Evaluation on potential of CO2 enhanced water recovery deployment in China’s coal chemical industry

WEI Ning(), LIU Sheng-Nan, LI Xiao-Chun   

  1. State Key Laboratory for Geo-mechanics and Geo-Technical Engineering/Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2019-11-21 Revised:2020-03-17 Online:2021-01-30 Published:2021-02-04


As a leading country in coal chemical technology, a huge number of coal chemical factories are at stages of operating, construction and proposal to administrative system in China. This causes huge problems of CO2 emissions and water demand. CO2-enhanced deep saline water recovery (CO2-EWR) technology can provide large-scale CO2 mitigation and additional water recovery, especially in coal rich and water scarcity areas. The combination of CO2 from industrial separation processes in the coal chemical industry and CO2-EWR technology can provide low-cost opportunities to solve the CO2 mitigation-water shortage nexus. The study firstly establishes a model of Integrated Techno-Economic Assessment Method for CO2 Capture, Utilization and Storage (ITEAM-CCUS) in industrial scale which includes source-sink matching, techno-economic assessment, CO2 emissions assessment, and storage site suitability evaluation. Then assess high concentrations of CO2 emissions which is captured from China’s coal chemical factories of 2018, source-sink matching, and the range of cost and emissions reduction potential of full chains CO2-EWR projects. The basic evaluation results are that most of the source-sink couplings distribute in dry areas including Northwest China, North China, northern, etc. Annual high concentrations of CO2 emissions respectively is 190 Mt and 1726 Mt assessing by the actual production in 2018 and the total capacity of coal chemical factories; the annual cumulative CO2 emission reductions are 160 Mt and 1569 Mt with levelized cost less than 200 CNY/t CO2, and the corresponding saline water production are 241 Mt and 2353 Mt, respectively. Therefore, CO2-EWR technology can be essential to low-carbon and sustainable development of the coal chemical industry in China, and may provide low-cost opportunities to spread the large-scale deployment of CCUS technologies in China.

Key words: CO2-enhanced water recovery (CO2-EWR), Coal chemical industry, Techno-economic evaluation, Source-sink matching, Cost curve

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