Solute exclusion from cellulose in packed columns: Experimental investigation and pore volume measurements

Equilibrium moisture is a limiting factor in achieving high solids in the later stages of pressing or pressing low basis weight grades. We have developed a model that relates equilibrium moisture directly to the pore size distribution of fibers as measured by the solute exclusion technique. The model shows that chemical pulping and refining increase equilibrium moisture by increasing pore volume at given pore sizes in fibers, which leads to lower pressed solids and greater energy expenditure in the dryer section. Means to increase equilibrium moisture without compromising pulp strength are briefly discussed.

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Liquid Maldistribution in Random-Packed Columns: Experimental Investigation of Influencing Factors

Chemical Engineering & Technology ◽

10.1002/ceat.201800467 ◽

2018 ◽

Vol 41 (11) ◽

pp. 2241-2249 ◽

Cited By ~ 8

Author(s):

Florian Hanusch ◽

Sebastian Rehfeldt ◽

Harald Klein

Keyword(s):

Experimental Investigation ◽

Influencing Factors ◽

Packed Columns

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Solute exclusion from cellulose in packed columns: Process modeling and analysis

Biotechnology and Bioengineering ◽

10.1002/bit.260400206 ◽

1992 ◽

Vol 40 (2) ◽

pp. 226-234 ◽

Cited By ~ 7

Author(s):

R. P. Neuman ◽

L. P. Walker

Keyword(s):

Process Modeling ◽

Packed Columns ◽

Modeling And Analysis ◽

Solute Exclusion

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ELASTIC PROPERTIES OF UNCONSOLIDATED POROUS SAND RESERVOIRS

Geophysics ◽

10.1190/1.1440797 ◽

1977 ◽

Vol 42 (7) ◽

pp. 1339-1368 ◽

Cited By ~ 280

Author(s):

S. N. Domenico

Keyword(s):

Pore Size ◽

Elastic Properties ◽

Pore Volume ◽

Grain Shape ◽

Fine Grained ◽

Naturally Occurring ◽

Unconsolidated Sand ◽

Fluid Properties ◽

Volume Measurements ◽

Fine Grained Sand

The effect of (1) compressive stress and (2) pore fluid properties on elastic properties of unconsolidated sand reservoirs was determined by laboratory velocity and pore volume measurements on two specimens. The latter consisted of a naturally occurring very fine‐grained sand and glass beads, each with a porosity of approximately 38 percent. Constituent compressibilities and densities of the two reservoir specimens are similar; thus, differences in measured elastic properties likely are attributable to differences in grain shape and pore size.

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EXPERIMENTAL INVESTIGATION OF POSTSTENOTIC DILATATION IN ISOLATED ARTERIES

Canadian Journal of Physiology and Pharmacology ◽

10.1139/y64-007 ◽

1964 ◽

Vol 42 (1) ◽

pp. 53-63 ◽

Cited By ~ 16

Author(s):

Margot R. Roach ◽

Kenneth Harvey

Keyword(s):

Experimental Investigation ◽

Iliac Arteries ◽

Volume Measurements ◽

Isolated Arteries ◽

Poststenotic Dilatation

Isolated human and dog iliac arteries were mounted in a double-chambered plethysmograph and perfused with merthiolate solution. Various degrees of stenosis were produced by plastic rings. Only arteries with moderate stenoses (i.e. those that produced a distal thrill and bruit) developed poststenotic dilatation, but all of them did. The dilatation usually started within 5 minutes, progressed rapidly for 20 to 30 minutes, and then more slowly for up to 3 days. Pressure–volume measurements showed that the dilated segment was more distensible than normal.

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