Site-Specific CO2 Adsorption and Zero Thermal Expansion in an Anisotropic Pore Network
Detailed neutron powder diffraction (NPD) expts. were carried out on the parent and CO2 adsorbed Mg-MOF-74 (MOF: metal-org. framework). Data collected at low temp. revealed two CO2 adsorption sites on the pore surface and multiple changes in the framework as a function of CO2 loading. Upon heating the samples to room temp., the data revealed minimal changes in expansivity upon adsorption of up to 0.94 CO2/Mg (≈ 25% mass fraction). Further, temp.-dependent data collected on the bare framework reveals net zero thermal expansion between 10 and 475 K.
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Queen, W. L., Brown, C. M., Britt, D. K., Zajdel, P., Hudson, M. R., & Yaghi, O. M. (2011). Site-Specific CO2 Adsorption and Zero Thermal Expansion in an Anisotropic Pore Network. Journal of Physical Chemistry C, 115, 24915–24919. https://doi.org/10.1021/jp208529p
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2011
115
24915
24919
REVIEWED
OTHER