Document Detail

What are Functional Ionic Liquids for the Absorption of Acidic Gases?
MedLine Citation:
PMID:  23360403     Owner:  NLM     Status:  Publisher    
As a kind of novel and efficient materials, ionic liquids (ILs) are used for capture of acidic gases including SO2 and CO2 from flue gas. Due to very low contents of acidic gases in flue gas, it is important to find functional ILs to absorb the acidic gases. However, up to now there is no criterion to distinguish ILs functional or not before use, which greatly influences the design of functional ILs. In this work, a series of ILs were synthesized and used to determine functional or normal ILs for the capture of acidic gases. It has been found that the pKa of organic acids formed the anion of ILs can be used to differentiate functional ILs from normal ILs for the capture of acidic gases from flue gas. If the pKa of an organic acid is larger than that of sulfurous acid (or carbonic acid), the IL formed by the organic acid can be called functional ILs for SO2 (or CO2) capture and it can have a high absorption capacity of SO2 (or CO2) with low SO2 (or CO2) concentrations. If not, the IL is just a normal IL. The pKa of organic acids can also be used to explain the absorption mechanism and guide the synthesis of functional ILs.
Shuhang Ren; Yucui Hou; Shidong Tian; Xiumei Chen; Weize Wu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-29
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  -     ISSN:  1520-5207     ISO Abbreviation:  J Phys Chem B     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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