During the reaction of the solid and the gas phases, solid hydroquinone (HQ) changes its crystal structure while a specifi c

component from mixed gasses is captured into the changed HQ crystal structure. To investigate the partitioning of mixed

gasses in the solid phase, the (SF 6 + N 2 ) gas mixtures having various compositions are used as a gas phase reactant at two

experimental pressures, 2.0 and 4.0 MPa. In addition, spectroscopic measurements are also performed to obtain qualitative

and quantitative information on partitioning of each gas component. From a series of experimental results, it was found that

N 2 is exclusively accommodated in the gas-loaded HQ crystal structure, while SF 6 is excluded from the solid crystal structure

due to its large molecular size. However, because such partitioning requires high partial pressures of N 2 in the gas mixtures

(higher N 2 composition at a given pressure or higher experimental pressure at a given gas composition), N 2 capture in the

HQ crystal structure is only observed at 80-mol% N 2 composition at the experimental pressure of 4.0 MPa among various

gas compositions. The captured amount of N 2 corresponds to 13.7 L at the STP condition per 1 kg of HQ. Although N 2 is

found to be selectively separated from the binary gas mixtures, further investigations focusing mainly on the reduction of

the experimental pressure and the increase of captured N 2 amount are necessary to apply to industrial fi elds.