Removing nitrosamines from amine-based carbon capture systems - 2135
- *Abstract
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Overview
Widespreadlegislation requiring the capture of greenhouse gas emissions from majorindustries, including fossil fuel power generation, makes the implementation ofcommercial carbon capture systems (CCS) imminent. Amine-based post-combustionCCS is currently the most promising option for separating CO2 from industry flue gases due to its relatively simple operation, high absorption capacity, and technological maturity. However, there are cost andsafety concerns slowing widespread implementation of this technology. The possibility of forming highly carcinogenic nitrosamines within the CCS process, and their subsequent emission into the environment, is arguably one of the critical concerns for regulators and communities near proposed CCS projects. Nitrosamines are volatile products known to form from amines and NOx oxidants that are common flue gas contaminants. The detection of even low levels of nitrosamines can lead to the delay of a CCS project.
Invention
Nitrosamine by products represent one of the last technical challenges amine-based carbon capture systems are facing. To overcome this hurdle, UK researchers are developing a method to effectively,actively, and continuously remove volatile nitrosamines that accumulate in thewater wash section of a CCS before they can be emitted into the atmosphere. In our process, nitrosamines are removed from the waterwash of a carbon capture system by selective adsorption of nitrosamines from the waterwash section of acid gas purification systems by activated carbon sorbents.
Water wash systems are used to control volatile and aerosol emissions, including nitrosamines, from carbon capture plants, but it is still necessary to remove or destroy nitrosamines in the circulating water wash to prevent their subsequent emissions into the environment. In our system, a water wash chamber has entrance and exit portals connected by circulation connection line that enables the water wash to flow, and a sorbent bed of activated carbon is placed within the circulation connection line. As the water wash flows over these activated carbons, nitrosamines are captured, thus reducing the environmental impact associated with amine-based carbon capture. The sorbent bed can be regenerated through thermal treatment or replaced to provide continued nitrosamine capture over a prolonged period of time.
Applications
- carbon capture and storage
Advantages
- cost effective
- non-toxic
- disposal of material is much easier
IP Status: U.S. Patent Application No. 15/708,844
- 國家/地區
- 美國
