Issue 1, 2010

A reversible zwitterionic SO2-binding organic liquid

Abstract

N,N-Dibutylundecanolamine is a liquid that chemically binds SO2 to form a viscous zwitterionic liquid that contains 35% by wt. SO2 at standard temperature and pressure. SO2 is chemically bound to the alcohol component as an alkylsulfite, which is then stabilized by the amine. The zwitterionic liquid can be reverted to its non-ionic form and recycled by thermally stripping the SO2 under vacuum at temperatures near 70 °C. N,N-Dibutylundecanolamine is a potential flue gas desulfurizing solvent because it is chemically selective to bind SO2 but not basic enough to chemically bind CO2.

Graphical abstract: A reversible zwitterionic SO2-binding organic liquid

Supplementary files

Article information

Article type
Communication
Submitted
11 Aug 2009
Accepted
17 Sep 2009
First published
28 Sep 2009

Energy Environ. Sci., 2010,3, 111-113

A reversible zwitterionic SO2-binding organic liquid

D. J. Heldebrant, P. K. Koech and C. R. Yonker, Energy Environ. Sci., 2010, 3, 111 DOI: 10.1039/B916550A

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