Post-combustion carbon capture has been implemented in large scale and several CO2 storage projects are being developed around the world (e.g. Oxy-fuel combustion – By burning fuel with pure oxygen instead of regular air, CO2 makes up a larger fraction of the waste gas, which makes it easier to separate out and store or repurpose.Īre these technologies already being used and what can be done with CO2 after it is captured?.For example by first converting coal into a mixture of CO2 and hydrogen by gasification, then capturing the CO2 and burning only the hydrogen. Pre-combustion – This involves pre-treatment of fuels so that carbon is separated from the finally burnt components.Post-combustion – Waste gas released from industrial combustion or power stations is captured and the CO2 is separated.The capture technologies fall into three main categories: New technologies for capturing CO2 are evolving rapidly, and a number of methods are already successfully applied to capture CO2 from different sources. Both CCS and CCU are based on carbon capture and the difference between the two lies in what happens after the capture step. What are CCS and CCU and how can CO2 be captured?ĬCS and CCU refer to the process of capturing CO2 and either storing it permanently (CCS) or utilizing it by converting it into valuable products, such as fuels and chemicals (CCU). To make sense of the potential - and need - for CCS and CCU, we compiled an information-packed article to help learn about the developments around them. CCS and CCU play a major role in meeting this objective. Today CCS is used to prevent almost 40 million tons of carbon dioxide (CO2) per year from escaping into the atmosphere and hundreds of additional carbon capture projects are currently being developed or ongoing.Īccording to a United Nations report, to reach the climate goals set out in the Paris climate agreement a concerted effort to capture (CO2) emissions is required. The two techniques can be harnessed to create carbon-neutral processes or even to reach a net negative greenhouse gas intensity of products. Carbon capture and storage (CCS) and carbon capture and utilization (CCU) are concepts making their way to the energy domain.
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