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Innovative Energy & Research | ISSN: 2576-1463 | Volume 7
Renewable Energy and Resources
Energy Materials and Fuel Cell Research
2
nd
International Conference on
&
August 27-28, 2018 | Boston, USA
Enhancement of biocatalytic conversionof carbondioxide usingmethyl-functionalized silicananoparticles
Byung-Keun Oh
Sogang University, South Korea
A
s chemical methods to reduce carbon dioxide (CO
2
), catalysis, electrocatalysis, and photocatalysis methods have been
studied to obtain valuable products such as methanol, formic acid, and formaldehyde from CO
2
. However, chemical
catalytic reaction methods require high-temperature and high-pressure operating conditions and electric/photodynamic
energy, with the drawbacks of a low selectivity and overall conversion yield. Biological CO
2
transformation technologies have
been highlighted as an alternative, because they have shown a high selectivity and conversion yield under ambient operation
conditions. However, in a biological reaction process using a gas substrate, the overall reaction rate is limited by the low gas
solubility and slow gas–liquid mass transfer rate. In this study, methyl-functionalized magnetic silica nanoparticles (methyl-
MSNs) were synthesized and applied to a CO
2
–water system to evaluate gas–liquid mass transfer. The addition of methyl-
MSNs increased the solubilized CO
2
concentration by 31.1% and the volumetric mass transfer coefficient was 78.3% higher
than that in a control experiment without nanoparticles. The addition of methyl-MSNs in the formate dehydrogenase reaction
resulted in a 12.0% increase in formic acid production and could decrease the reaction time required to finish the batch enzyme
reaction from 1.5 h to 1.0 h. This result showed that the addition of methyl-MSNs could be useful for biological processes,
including enzyme reactions, when using a gas substrate to improve productivity.
Acknowledgement:
This research was supported by C1 Gas Refinery Program through the National Research Foundation of
Korea(NRF) funded by the Ministry of Science, ICT & Future Planning (2017M3D3A1A01037006-2).
Biography
Byung-Keun Oh received his Ph.D. degree in Chemical and Biomolecular Engineering at Sogang University for his work on protein chip for detection of pathogens
existing in contaminated environment in 2003. He worked then as a postdoctoral fellow in Northwestern University from 2004 to 2006. In 2006, he joined the faculty
as a professor in Department of Chemical and Biomolecular Engineering at Sogang University. His research interests mainly lie in the interdisciplinary area which
can be termed as "biotechnology and bioenergy", especially the development of nanoparticle-based biodetection schemes and the enhancement of biological
conversion efficiency in gas based fermentation.
bkohkr@gmail.comByung-Keun Oh, Innov Ener Res 2018, Volume 7
DOI: 10.4172/2576-1463-C2-006