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Tytuł pozycji:

Designing silica xerogels containing RTIL for CO 2 capture and CO 2 /CH 4 separation: Influence of ILs anion, cation and cation side alkyl chain length and ramification.

Tytuł :
Designing silica xerogels containing RTIL for CO 2 capture and CO 2 /CH 4 separation: Influence of ILs anion, cation and cation side alkyl chain length and ramification.
Autorzy :
Dos Santos LM; School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil.
Bernard FL; School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil.
Polesso BB; Post-Graduation Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil.
Pinto IS; School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil.
Frankenberg CC; School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil.
Corvo MC; CENIMAT|i3N, Dep. Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Caparica, Portugal.
Almeida PL; CENIMAT|i3N, Dep. Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Caparica, Portugal; ISEL, ADF, Rua Conselheiro Emídio Navarro 1, Lisboa, Portugal.
Cabrita E; UCIBIO, Dep.Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Caparica, Portugal.
Einloft S; School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil; Post-Graduation Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil. Electronic address: .
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Źródło :
Journal of environmental management [J Environ Manage] 2020 Aug 15; Vol. 268, pp. 110340. Date of Electronic Publication: 2020 May 14.
Typ publikacji :
Journal Article
Język :
English
Journal Info :
Publisher: Academic Press Country of Publication: England NLM ID: 0401664 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8630 (Electronic) Linking ISSN: 03014797 NLM ISO Abbreviation: J. Environ. Manage. Subsets: MEDLINE
Imprint Name(s) :
Original Publication: London ; New York, Academic Press.
MeSH Terms :
Ionic Liquids*
Silicon Dioxide*
Anions ; Carbon Dioxide ; Cations
Contributed Indexing :
Keywords: CO(2) separation; Ionic liquids; Natural gas; Silica xerogels
Substance Nomenclature :
0 (Anions)
0 (Cations)
0 (Ionic Liquids)
142M471B3J (Carbon Dioxide)
7631-86-9 (Silicon Dioxide)
Entry Date(s) :
Date Created: 20200509 Date Completed: 20200610 Latest Revision: 20200610
Update Code :
20200827
DOI :
10.1016/j.jenvman.2020.110340
PMID :
32383660
Czasopismo naukowe
CO 2 separation from natural gas is considered to be a crucial strategy to mitigate global warming problems, meet product specification, pipeline specs and other application specific requirements. Silica xerogels (SX) are considered to be potential materials for CO 2 capture due to their high specific surface area. Thus, a series of silica xerogels functionalized with imidazolium, phosphonium, ammonium and pyridinium-based room-temperature ionic liquids (RTILs) were synthesized. The synthesized silica xerogels were characterized by NMR, helium pycnometry, DTA-TG, BET, SEM and TEM. CO 2 sorption, reusability and CO 2 /CH 4 selectivity were assessed by the pressure-decay technique. Silica xerogels containing IL demonstrated advantages compared to RTILs used as separation solvents in CO 2 capture processes including higher CO 2 sorption capacity and faster sorption/desorption. Using fluorinated anion for functionalization of silica xerogels leads to a higher affinity for CO 2 over CH 4. The best performance was obtained by SX- [bmim] [TF 2 N] (223.4 mg CO 2 /g mg/g at 298.15 K and 20 bar). Moreover, SX- [bmim] [TF 2 N] showed higher CO 2 sorption capacity as compared to other reported sorbents. CO 2 sorption and CO 2 /CH 4 selectivity results were submitted to an analysis of variance and the means compared using Tukey's test (5%).
(Copyright © 2020 Elsevier Ltd. All rights reserved.)

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