Inhibiting nitrosation of aqueous amine solutions used in carbon capture - 1884
- *Abstract
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Overview
The cleanup of acid gasses, such as CO2, fromnatural gas has been an extensively practiced technology. Post-combustion CO2capture is the newest interest in this field, and allows for any CO2removed from a solution to be available for subsequent use in enhanced oilrecovery (EOR), downstream products or sequestration. The development of theseuses, however, are currently limited by the supply of CO2 in themarket. Given the current demand for carbon dioxide, a need has arisen for theimplementation of enhanced carbon capture processes, specifically by businessesin the energy sector. The flue gases used in these carbon capture processes,though, contain oxidative contaminants which threaten to degrade the solventsused to extract CO2. UK researchers are developing method toprevent this potential degradation by inhibiting nitrosation of the aqueousamine solutions used in carbon capture.
Invention
UK researchers are developing a method of inhibiting nitrosationof aqueous amine solutions used in carbon capture. Contaminants in the fluegases used in this process threaten to degrade the solvents used for CO2extraction, and of these contaminants, reactions with NOx are themost concerning. In order to combat this threat, chemical additives orinhibitors may be used to reduce nitrosation. The additive works by reactingwith active radical species in the solution, which prevents reactions with theamines. This method would be particularly useful for plants struggling with theissue of NOx related degradation during carbon capture and may alsobe of use for manufacturers interested in increasing their carbon captureefficiency and output.
Advantages
- use of chemical additivesdecreases amine degradation from nitrosation
- overall increase in efficiency andcarbon output without drastic alterations of currently implemented carboncapture processes
IP Status: U.S Patent No. 9,675,928
- Country/Region
- USA
