Abstract
The CO 2 adsorption phenomenon in IRMOF-1 is considered on the basis of the cluster adsorption model. It has been shown that sorbate molecules are sorbed on the sorbent surface in the form of monomers and clusters of various dimensions. An explanation is proposed for the stepwise increase in the sorbate loading by the rapid sorbate adsorption as the n CO 2 clusters within a narrow pressure range. For the studied system, equations are obtained that describe the experimental isotherms for temperatures 195, 208, 218, and 298K. • Sorbate molecules are sorbed on the sorbent surface in the form of monomers and clusters. • The transition from the monomers adsorption to the clusters adsorption is accompanied by a sharp increase in the loading. • The isotherms equations of the CO 2 cluster adsorption by IRMOF-1 were obtained for different temperatures. • An explanation of the mechanism of the stepwise adsorption isotherm is given.
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