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Surface Bespoke Mesoporous Silica for Carbon Dioxide Adsorption

IR@CSIR-NEERI

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Title Surface Bespoke Mesoporous Silica for
Carbon Dioxide Adsorption
 
Creator Kumar, vivek
Labhsetwar, Nitin
Drage, Trevor
Stevens, Lee
Meshram, Siddharth
Rayalu, Sadhana
 
Subject Materials Science
 
Description Amine functionalized mesoporous adsorbents were synthesized and evaluated for adsorption of CO2. In the present study the
mesoporous silica surface was treated with a surfactant tetra-n-propyl ammonium hydroxide (TPAOH) with an aim to tailor the characteristics
of mesoporous silica walls. The as synthesized adsorbents were tested for determining equilibrium adsorption capacity using 100% CO2 and
diluted 15% CO2 stream at different temperatures (30, 55, and 75°C). Equilibrium CO2 adsorption capacity of TEPA modified surface-treated
silica was 2.51 and 2.54 mmol=g at 75°C under 15 and 100% CO2 concentration respectively. The as-synthesized adsorbents were also tested
for determining dynamic adsorption capacity using 100% CO2 and diluted (15, 50, and 75%) CO2 stream at different temperatures (30, 55,
and 75°C). Dynamic CO2 adsorption capacity of TEPA modified silica was 1.67 and 4.29 mmol=g at 75°C under 15 and 100% CO2 concentration
respectively. This signifies the role of surfactant treatment affecting the pore characteristics with consequent increase in adsorption
capacity of TEPA modified silica over unaltered matrices, increasing the equilibrium CO2 adsorption capacity by a factor of 32. Consistent
cyclic regeneration indicates excellent practical usability of the adsorbent. Low and wide angle X-ray diffraction (XRD), scanning electron
microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy have been performed to study the morphological properties of the
present adsorbent support.
 
Publisher American Society of Civil Engineers
 
Date 2014
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1077/1/kumar2014.pdf
Kumar, vivek and Labhsetwar, Nitin and Drage, Trevor and Stevens, Lee and Meshram, Siddharth and Rayalu, Sadhana (2014) Surface Bespoke Mesoporous Silica for Carbon Dioxide Adsorption. Journal of Environmental Engineering, 140 (10). 04014031-1. ISSN 1943-7870
 
Relation https://ascelibrary.org/journal/joeedu
http://neeri.csircentral.net/1077/