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Diamine solvent system for CO2 capture

Patent ·
OSTI ID:1892676
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Disclosed herein is a method and system for CO2 removal from a gas stream using a diamine solvent having a Formula I R1(R2)N-L1-NH-R3. With respect to Formula I, each of R1 and R2 independently is aliphatic, cycloaliphatic, or R1 and R2 together with the nitrogen to which they are attached, form a heterocyclyl ring; L1 is aliphatic, cycloaliphatic, or L1 and R1 together with the nitrogen to which they are attached form a heterocyclyl ring; and R3 is aliphatic, cycloaliphatic, cycloalkylalkyl, or alkoxyalkyl. And/or the compound may have a viscosity of less than 75 cP at a CO2-loading of 40 mol % and at a temperature of 40° C.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Number(s):
11,266,947
Application Number:
16/363,672
OSTI ID:
1892676
Country of Publication:
United States
Language:
English

References (8)

Reversible zwitterionic liquids, the reaction of alkanol guanidines, alkanol amidines, and diamines with CO2 journal January 2010
CO 2 Capture by Tertiary Amine Absorbents: A Performance Comparison Study journal June 2013
New Amines for CO 2 Capture. I. Mechanisms of Amine Degradation in the Presence of CO 2 journal October 2009
Toward Intelligent CO 2 Capture Solvent Design through Experimental Solvent Development and Amine Synthesis journal August 2016
Water-Lean Solvents for Post-Combustion CO 2 Capture: Fundamentals, Uncertainties, Opportunities, and Outlook journal May 2017
New Amines for CO 2 Capture. IV. Degradation, Corrosion, and Quantitative Structure Property Relationship Model journal April 2012
Development of novel tertiary amine absorbents for CO2 capture journal February 2009
Synthesis of new amines for enhanced carbon dioxide (CO2) capture performance: The effect of chemical structure on equilibrium solubility, cyclic capacity, kinetics of absorption and regeneration, and heats of absorption and regeneration journal July 2016

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