| Titre : | Room temperature ionic liquids for mercury capture from flue gas (2008) |
| Auteurs : | Lei Ji, Auteur ; Stephen W Thiel, Auteur ; neville G. Pinto, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 47 n°21, Novembre 2008) |
| Article en page(s) : | p. 8396–8400 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Résumé : | Six room temperature ionic liquids (RTILs) were synthesized and tested as coatings for adsorbents for mercury capture from nitrogen at 160 °C. All six RTILs were thermally stable to temperatures above 160 °C. These RTILs were coated on mesoporous silica gel, and the fixed-bed mercury capture characteristics of these adsorbents were observed at 160 °C. Hg0 capture appears to result from the formation of a complex involving Hg0 and ions in the RTIL complex, and not from oxidation by the RTIL. The high observed oxidized mercury capacity for Cl−-based RTILs is believed to be due to greater dissociation of HgCl2 in the RTILs that incorporate chloride anion. The higher hydrogen-bond basicity and dipolarity of these RTILs might underlie improved HgCl2 dissociation. [bmim]Cl was identified as a promising RTIL for the simultaneous capture of elemental and oxidized mercury from the gas phase. A nanostructured chelating adsorbent with a coating of 25 wt % [bmim]Cl has an elemental mercury capacity of 10 mg/g and an oxidized mercury capacity of at least 38 mg/g. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie8008023 |
