Characterization of Local Fluid Distribution by NMR

Kyung-Hoe Kim

Journal of Industrial and Engineering Chemistry, Vol.1, No.1, 64-69, December, 1995

Dept. of Chem. Eng., Taegu Univ., Kyungsan, Kyungbuk 713-714, Korea

Pulsed field gradient (PFG) NMR techniques are used to observe restricted diffusion phenomena in systems of fluids in restricted geometries. Model porous media of 8 different size bead packs (closely-packed glassbead of 8 different size ranges) have been engaged to observe the apparent diffusivity using the PFG NMR stimulated echo sequence. Carrying out this type of experiment in the different pore size systems reveals the dependence of the aparent diffusivity on the pore sizes. The diffusion-time dependence of the apparent diffusivity is an important parameter for characterizing the non-uniformity of pore structure. Parameter estimation procedure for analyzing NMR diffusion experiment finds multicomponent fashion of apparent diffusivity indicating different distribution of pore size.

[References]

Greenkorn RA, "Flow Phenomenat in Porous Media," Marcel Dekker, Inc., New York (1983)
Lesage S, Jackson RE, "Groundwater Contamination and Analysis at Hazardous Waste Site," Marcel Dekker, Inc., New York (1992)
Gerstl Z, Chen Y, Mingelgrin U, Yaron B, "Toxic Organic Chemicals in Porous Media," Springer-Verlag, New York (1989)
Packer KJ, Rees C, J. Colloid Interface Sci., 40(2), 206 (1972)
Neuman CH, J. Chem. Phys., 60, 4508 (1974)
Tanner JE, Stejskal EO, J. Chem. Phys., 49, 1768 (1968)
Karlicek RF, Lowe IJ, J. Mag. Res., 37, 75 (1980)
Stejskal EO, Tanner JE, J. Chem. Phys., 42, 288 (1965)
Woessner DE, J. Phys. Chem., 67, 1365 (1963)
Tanner JE, J. Chem. Phys., 52, 2523 (1970)
Karger J, Pefeofer H, Heink W, Adv. Mag. Res., 12, 1 (1988)

[1] Greenkorn RA, "Flow Phenomenat in Porous Media," Marcel Dekker, Inc., New York (1983)

[2] Lesage S, Jackson RE, "Groundwater Contamination and Analysis at Hazardous Waste Site," Marcel Dekker, Inc., New York (1992)

[3] Gerstl Z, Chen Y, Mingelgrin U, Yaron B, "Toxic Organic Chemicals in Porous Media," Springer-Verlag, New York (1989)

[4] Packer KJ, Rees C, J. Colloid Interface Sci., 40(2), 206 (1972)

[5] Neuman CH, J. Chem. Phys., 60, 4508 (1974)

[6] Tanner JE, Stejskal EO, J. Chem. Phys., 49, 1768 (1968)

[7] Karlicek RF, Lowe IJ, J. Mag. Res., 37, 75 (1980)

[8] Stejskal EO, Tanner JE, J. Chem. Phys., 42, 288 (1965)

[9] Woessner DE, J. Phys. Chem., 67, 1365 (1963)

[10] Tanner JE, J. Chem. Phys., 52, 2523 (1970)

[11] Karger J, Pefeofer H, Heink W, Adv. Mag. Res., 12, 1 (1988)