The spin-lattice relation time and chemical shift of water in CPCWS by proton NMR spectroscopy

The coal-petroleum coke-water slurries(CPCWS) are complex fluids. It has been known that the H-1-NMR can provide the quantitative information on the hydrophobic property of carbonaceous solid and on the microstructure and dynamics behavior about water in the slurry. In this paper, H-1-NMR has been used to study the microstructure of water and their dynamics. Two relationships have been attained, that the chemical shifts of all water and the bound water in slurries, respectively, increase linearly with the increase of the weight percent of coal in the total of coal and petroleum coke(PC). The fraction of bound water can be obtained by a formula drawn from these two relationships. The spin-lattice relaxation time T-1 of the PC-water slurry is 42 times longer than that of the coal-water slurry. The tendency of change of T-1 with the increase of the coal content has been discussed.