Mixed amine and non-nucleophilic base CO2 scrubbing process for improved adsorption at increased temperatures (ExxonMobil)

CATEGORY: CARBON CAPTURE 
Mixed amine and non-nucleophilic base CO2 scrubbing process for improved adsorption at increased temperatures (ExxonMobil)

Type	Patent
Inventor	Pavel Kortunov
Inventor	Lisa S. Baugh
URL	Free Full Text Full Text Source (Subscription or Fee):  http://www.google.com/patents/US8715397
Assignee	Exxonmobil Research And Engineering Company
Patent Number	US8715397 B2
Issue Date	May 6, 2014
Abstract	A CO2 amine scrubbing process uses an absorbent mixture combination of an amine CO2 sorbent in combination with a non-nucleophilic, relatively stronger, typically nitrogenous, base. The weaker base(s) are nucleophilic and have the ability to react directly with the CO2 in the gas stream while the relatively stronger bases act as non-nucleophilic promoters for the reaction between the CO2 and the weaker base. The sorption and desorption temperatures can be varied by selection of the amine/base combination, permitting effective sorption temperatures of 70 to 90° C., favorable to scrubbing flue gas.