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Volume 8, Issue 9 (Suppl)
J Earth Sci Clim Change
ISSN: 2157-7617 JESCC, an open access journal
Climate Congress 2017
October 16-17, 2017
Page 30
Notes:
conference
series
.com
October 16-17, 2017 Dubai, UAE
3
rd
World Congress on
Climate Change and Global Warming
Amino-functionalized mesoporous silica-based adsorbent for CO
2
post-combustion capture
C
onventional method capturing CO
2
using amine solution has been well-known and practiced in natural gas purification
for long time, but it involves high energy demand, corrosion and degradation and not suitable to capture CO
2
from
industrial sources like power plant flue gas. Amino-functionalized mesoporous silica adsorbent has emerged as a promising
material for CO
2
post-combustion capture due to its possible reduction in regeneration energy, cheap price and ease to
produce at large scale. Different types of adsorbents have been prepared by impregnating amines or grafting amino functional
groups on inexpensive mesoporous silica and tested for CO
2
capture. Polyethyleneimine impregnated mesoporous silica (PEI-
MPS) possesses high CO
2
loading (above 11 mg/g), it is easy to be produced at large scale and stable for multiple adsorption/
regeneration cycles operating in a packed bed reactor. It lost only 16.6% CO
2
loading after 335 adsorption/regeneration cycles
at 65/120
o
C, respectively. At high temperature, PEI-MPS encounters the vaporization of PEI causing a quick degradation,
particularly in fluidized bed reactor. Amino-functionalized mesoporous silica (APTES-MPS) is synthesized by grafting
method, in which, amino-functional groups form a chemical bond to silica substrate through Si-O-Si bridges. Thanks to the
chemical bonding, APTES-MPS is more thermally and mechanically stable; it starts degradation at 205
o
C. Even though, the
CO
2
loading of this adsorbent (~80 mg/g) is lower than that of PEI-MPS, it may be suitable for CO
2
capture using fluidized bed
reactor. Recent study indicated that the use of PEI-MPS for CO
2
capture reduced ~46% regeneration energy in comparison with
conventional 30% ethanolamine solution. This is due to the low heat capacity of solid adsorbent (~2.2 J/
o
C) and the avoidance
of water vaporization. Mesoporous silica is produced using sodium silicate; cheap silica precursor therefore resulting amino-
functionalized mesoporous silica could be inexpensive and suitable CO
2
capture. Highly stable adsorbent with significant
reduction in energy consumption is a basis for an advanced CO
2
capture process.
Biography
Mohammad R M Abu Zahra is an Associate Professor and Department Head of Chemical and Environmental Engineering at Masdar Institute. His current research
focuses on the development of CO
2
capture technologies including the development of advanced solvents, solid sorbents and novel processes. He is currently the
Coordinator of the CCS research activities within Masdar Institute and he is leading major related projects.
mabuzahra@masdar.ac.aeMohammad R M Abu Zahra, J Earth Sci Clim Change 2017, 8:9 (Suppl)
DOI: 10.4172/2157-7617-C1-032
Mohammad R M Abu Zahra
Masdar Institute of Science and Technology, UAE