Abstract
Carbon capture, utilization, and storage (CCUS) is a gas injection technology that enables the storage of CO2 underground. The aims are twofold, on one hand to reduce the emissions of CO2 into the atmosphere and on the other hand to increase oil/gas/heat recovery. Different types of CCUS technologies and related engineering projects have a long history of research and operation in the USA. However, in China they have a short development period ca. 10 years. Unlike CO2 capture and CO2-EOR technologies that are already operating on a commercial scale in China, research into other CCUS technologies is still in its infancy or at the pilot-scale. This paper first reviews the status and development of the different types of CCUS technologies and related engineering projects worldwide. Then it focuses on their developments in China in the last decade. The main research projects, international cooperation, and pilot-scale engineering projects in China are summarized and compared. Finally, the paper examines the challenges and prospects to be experienced through the industrialization of CCUS engineering projects in China. It can be concluded that the CCUS technologies have still large potential in China. It can only be unlocked by overcoming the technical and social challenges.
Highlights
Fossil fuels, especially coal that is rich in carbon, constitute the highest proportion of primary energy in China [1]
China Central Television (CCTV) in 2014, haze particles from automobile exhausts contributed 22.2%, while the burning of coal, dust, and industrial emissions accounted for proportions of 16.7%, 16.3%, and 15.7%, respectively
Only its utilization for geologic and geoengineering purposes such as Enhanced Oil Recovery (EOR), Enhanced Coalbed Methane Recovery (ECBM), Enhanced Shale Gas Recovery (ESG), and Enhanced Gas Recovery (EGR) has been considered in this paper
Summary
Especially coal that is rich in carbon, constitute the highest proportion of primary energy in China [1]. Top on the list of CO2 emissions in the world, China aims at reducing 40%–45% of its CO2 emissions per unit GDP by 2020, based on the 2005 level [5,6,7] This requires considerable changes in the framework of fossil fuel consumption, and in the development of renewable energy from wind, solar, geothermal, and so on, together with an enlargement in the area covered by forests and innovations in technologies that can enable permanent storage of the CO2 underground. CO2 capture and sequestration (CCS) and utilization (CCUS) technologies can be applied to store CO2 underground effectively, reducing its emission into the atmosphere This technology is highly developed and is likely to play a significant role in China, especially when the operation costs are reduced. Only its utilization for geologic and geoengineering purposes such as EOR, ECBM, ESG, and EGR has been considered in this paper
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