Ether-functionalized ionic liquids as highly efficient SO2 absorbents

Room temperature ionic liquids (RTILs), ether-functionalized imidazolium methanesulfonates, exhibit extremely high SO2 solubility, at least 2 moles of SO2 per mole of RTIL at 30 [degree]C and at atmospheric pressure. The solubility of SO2 in these RTILs increases with increasing number of tethered e...

Full description

Saved in:
Bibliographic Details
Published in:Energy & environmental science 2011-01, Vol.4 (5), p.1802-1806
Main Authors: Hong, Sung Yun, Im, Jinkyu, Palgunadi, Jelliarko, Lee, Sang Deuk, Lee, Je Seung, Kim, Hoon Sik, Cheong, Minserk, Jung, Kwang-Deog
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Room temperature ionic liquids (RTILs), ether-functionalized imidazolium methanesulfonates, exhibit extremely high SO2 solubility, at least 2 moles of SO2 per mole of RTIL at 30 [degree]C and at atmospheric pressure. The solubility of SO2 in these RTILs increases with increasing number of tethered ether oxygen atoms and also with the pressure rise. FT-IR spectroscopic and quantum mechanical calculation results show that such high SO2 solubility is originated from the combined interactions of SO2 with methanesulfonate anion and ether oxygen atom or atoms on the imidazolium ring. The absorbed SO2 gas can be readily and completely desorbed from the RTILs by heating at 100 [degree]C in a N2 flow, thereby allowing the RTILs to be reused up to 5 cycles without loss of their initial capacity.
ISSN:1754-5692
1754-5706
DOI:10.1039/c0ee00616e