Specific features of the adsorption and nuclear magnetic relaxation of the water molecules in active carbons: 2. The state of water in active carbon with relatively large pores according to the NMR relaxation data

The state of water upon adsorption on FAS-3 active carbon with relatively large micropores is studied by the NMR relaxation method. The dependences of the times of spin-lattice (T-1) and spin-spin (T-2) NMR relaxation of adsorbed water molecules on the adsorption value are established. The character of the dependences of T-1 and T-2 on the number of adsorbed water molecules per primary adsorption site reflects the specific features of the volume filling of micropores and the formation of a continuous adsorption layer on the mesopore surface due to cluster coalescence on the one wall of a pore. The results obtained are compared with the data for typical microporous active carbons, as well as with the data obtained by the adsorption method.