Next Article in Journal
Synthesis and Thermoelectric Properties in the 2D Ti1 xNbxS3 Trichalcogenides
Previous Article in Journal
Bioactive Wollastonite-Diopside Foams from Preceramic Polymers and Reactive Oxide Fillers
Previous Article in Special Issue
Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability
Article Menu

Export Article

Open AccessArticle
Materials 2015, 8(5), 2495-2513; doi:10.3390/ma8052495

“Low Cost” Pore Expanded SBA-15 Functionalized with Amine Groups Applied to CO2 Adsorption

1
Department of Chemical Engineering, Universidade Federal do Ceará, Campus do Pici, bl. 709, 60455-760 Fortaleza, Brazil
2
Departament of Inorganic Chemistry, Cristallography and Mineralogy, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Rafael Luque
Received: 1 March 2015 / Revised: 28 April 2015 / Accepted: 30 April 2015 / Published: 11 May 2015
(This article belongs to the Special Issue Advances in Mesoporous Material 2015)
View Full-Text   |   Download PDF [455 KB, uploaded 11 May 2015]   |  

Abstract

The CO2 adsorption capacity of different functionalized mesoporous silicas of the SBA-15 type was investigated and the influence of textural properties and the effect of the silicon source on the CO2 uptake studied. Several adsorbents based on SBA-15 were synthesized using sodium silicate as silicon source, replacing the commonly used tetraethyl orthosilicate (TEOS). Thus, we synthesized three couples of supports, two at room temperature (RT, RT-F), two hydrothermal (HT, HT-F) and two hydrothermal with addition of swelling agent (1,3,5-triisopropylbenzene) (TiPB, TiPB-F). Within each couple, one of the materials was synthesized with ammonium fluoride (NH4F). The supports were functionalized via grafting 3-aminopropyltriethoxysilane (APTES) and via impregnation with polyethylenimine ethylenediamine branched (PEI). The adsorption behavior of the pure materials was described well by the Langmuir model, whereas for the amine-silicas, a Dualsite Langmuir model was applied, which allowed us to qualify and quantify two different adsorption sites. Among the materials synthesized, only the SBA-15 synthesized at room temperatures (RT) improved its properties as an adsorbent with the addition of fluoride when the silicas were functionalized with APTES. The most promising result was the TiPB-F/50PEI silica which at 75 °C and 1 bar CO2 captured 2.21 mmol/g. View Full-Text
Keywords: SBA-15; 1,3,5-triisopropylbenzene; ammonium fluoride; adsorption; CO2; 3-aminopropyltriethoxysilane; polyethylenimine ethylenediamine; Dualsite Langmuir model; chemisorptions SBA-15; 1,3,5-triisopropylbenzene; ammonium fluoride; adsorption; CO2; 3-aminopropyltriethoxysilane; polyethylenimine ethylenediamine; Dualsite Langmuir model; chemisorptions
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Vilarrasa-García, E.; Cecilia, J.A.; Moya, E.M.O.; Cavalcante, C.L., Jr.; Azevedo, D.C.S.; Rodríguez-Castellón, E. “Low Cost” Pore Expanded SBA-15 Functionalized with Amine Groups Applied to CO2 Adsorption. Materials 2015, 8, 2495-2513.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top