(630h) High Pressure Adsorption Behaviors of Carbon Dioxide On Clay Minerals

High pressure adsorption behaviors of carbon dioxide on clay minerals

Hae Jung Kim, Ji Won Choi, Hyeon Hui Lee and Chang-Ha Lee^*

Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Korea

^*E-mail: leech@yonsei.ac.kr, Tel: +82-2-2123-2762

To assuage
global climate change concerns with greenhouse gas generation, capturing and
sequestering CO₂ emission is one of the promising methods. The
current strategies are implementation of sequestration options from saline aquifers
and depleted oil and gas reservoirs to unminable coal
seams and abandoned coal mines. Along with the storage capacity of reservoirs,
the sealing integrity of caprock and potential
changes in this integrity is one of important factors due to the interaction
with CO₂.

Clay mineral is
one of constituent of coal mineral matter and it is also a major mineralogy of
shale which is used as cap rocks for storage. It has a chemical composition
based on phyllosilicate crystalline phases with
incorporated metal cations and other impurities such
as water. Its structure can expand for better pore accessibility and contract
to trap so that small molecules trapping can be induced.  

In this study,
gas adsorption characteristics on three kinds of clay minerals were measured and
compared from subcritical to supercritical conditions to evaluate the CO₂
storage potential of these materials under reservoir conditions. In addition,
the structural change caused by CO₂ sorption was observed from BET
results comparison between raw material and CO₂ adsorbed one after
the experiment.

References

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Alles, Y. Gensterblum, D. Prinz, D.N. Dewhurst, M.D. Raven, H.Stanjek,
B.M. Krooss, Int. J. Greenhouse Gas Control, 2 (2008)
297-308.

[2] V.N.
Romanov, T.E. Ackman, Y. Soong, R.L. Kleinman, Environ. Sci. Tech., 43 (2009) 561-564.