The influence of particle size of amino-functionalized MCM-41 silicas on CO2 adsorption
| Autor: | Leonardo Marchese, Chiara Bisio, Enzo Mangano, Giorgio Gatti, Geo Paul, Chiara Vittoni, Stefano Brandani, Daniele Costenaro |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Carbamate
Materials science medicine.medical_treatment DRY General Physics and Astronomy 02 engineering and technology 010402 general chemistry 01 natural sciences Adsorption MCM-41 MESOPOROUS MOLECULAR-SIEVE SYSTEMS medicine Organic chemistry Physical and Theoretical Chemistry Fourier transform infrared spectroscopy TEMPERATURE removal CARBON-DIOXIDE CAPTURE carbon dioxide 021001 nanoscience & nanotechnology Grafting ADSORBENTS 0104 chemical sciences SOLID-STATE NMR Chemical engineering Solid-state nuclear magnetic resonance adsorption Particle Particle size 0210 nano-technology porous materials |
| Zdroj: | Physical chemistry chemical physics (Online) 19 (2017): 29449–29460. doi:10.1039/C7CP05177H info:cnr-pdr/source/autori:G. Gatti, C. Vittoni, D. Costenaro, G. Paul, E. Mangano, S. Brandani, L. Marchese, C. Bisio/titolo:The influence of particle size of amino-functionalized MCM-41 silicas on CO2 adsorption/doi:10.1039%2FC7CP05177H/rivista:Physical chemistry chemical physics (Online)/anno:2017/pagina_da:29449/pagina_a:29460/intervallo_pagine:29449–29460/volume:19 Gatti, G, Vittoni, C, Costenaro, D, Paul, G, Mangano, E, Brandani, S, Marchese, L & Bisio, C 2017, ' The influence of particle size of amino-functionalized MCM-41 silicas on CO2 adsorption ', Physical Chemistry Chemical Physics, vol. 19, no. 43, pp. 29449-29460 . https://doi.org/10.1039/c7cp05177h |
| Popis: | The CO2 adsorption properties of hybrid organic-inorganic MCM-41 silicas with different particle sizes are described here. Micrometric to nanometric MCM-41 silicas are functionalized by introducing amino groups via grafting of 3-[2-(2-aminoethyl) aminoethyl] aminopropyltrimethoxysilane (PAPTS). A combination of FTIR and SS-NMR spectroscopies is adopted to distinguish between physisorbed and chemisorbed CO2. A higher amount of CO2 is physisorbed in the nanometric sample because of a higher pore volume, whereas chemisorbed (carbamate and acid carbamic) species are more abundant in the micrometric sample. The adsorption process is also quantitatively studied using three different techniques (i.e. volumetric measurements, Thermo-Gravimetric Analysis (TGA) and Zero Length Column (ZLC) analysis), especially focusing on the reversibility of the reactions between CO2 and amino groups. The three techniques show a higher CO2 adsorption capacity for MCM-41 with nanometric size compared to the micrometric one. Finally, the process is studied at different temperatures (i.e. from 35 to 90 degrees C) in order to find the best operating conditions. |
| Databáze: | OpenAIRE |
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