Determination of gas flow distribution in a SO2-oxidation industrial reactor by radiotracer technique

AbstractThe surface activity of carbon black (CB) is an important factor affecting the reinforcement of rubber. The quantitative determination of the surface activity (surface free energy) of CB is of great significance. A simplified formula is obtained to determine the free energy of CB surface through theoretical analysis and mathematical derivation. The surface free energy for four kinds of industrial CBs were measured by inverse gas chromatography, and the influential factors were studied. The results showed that the aging time of the chromatographic column plays an important role in accurate measurement of the surface free energy of CB, in comparison with the influences from the inlet pressure and carrier gas flow rate of the chromatographic column filled with CB. Several kinds of industrial CB were treated at high temperature, and the surface free energy of CB had a significant increase. With the increase of surface free energy, the maximum torque was decreased significantly, the elongation at break tended to increase, the heat generation of vulcanizates was increased, and the wear resistance was decreased.

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A model for burden distribution and gas flow distribution of bell-less top blast furnace with parallel hoppers

Applied Mathematical Modelling ◽

10.1016/j.apm.2016.07.024 ◽

2016 ◽

Vol 40 (23-24) ◽

pp. 10254-10273 ◽

Cited By ~ 10

Author(s):

Lin Shi ◽

Guangsheng Zhao ◽

Mingxin Li ◽

Xiang Ma

Keyword(s):

Blast Furnace ◽

Gas Flow ◽

Flow Distribution ◽

Burden Distribution

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Determination of respiratory gas flow by electrical impedance tomography in an animal model of mechanical ventilation

BMC Pulmonary Medicine ◽

10.1186/1471-2466-14-73 ◽

2014 ◽

Vol 14 (1) ◽

Cited By ~ 6

Author(s):

Marc Bodenstein ◽

Stefan Boehme ◽

Stephan Bierschock ◽

Andreas Vogt ◽

Matthias David ◽

...

Keyword(s):

Mechanical Ventilation ◽

Animal Model ◽

Electrical Impedance Tomography ◽

Gas Flow ◽

Electrical Impedance ◽

Impedance Tomography

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A gas flow method for determination of in-plane permeability of fiber preforms

Polymer Composites ◽

10.1002/pc.10515 ◽

2001 ◽

Vol 22 (1) ◽

pp. 47-56 ◽

Cited By ~ 15

Author(s):

Moon-Kwang Um ◽

Isaac M. Daniel ◽

Brian W. Childs

Keyword(s):

Gas Flow ◽

Flow Method ◽

Fiber Preforms

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Measurement of Intrarenal Blood-Flow Distribution in the Rabbit Using Radioactive Microspheres

Clinical Science ◽

10.1042/cs0480051 ◽

1975 ◽

Vol 48 (1) ◽

pp. 51-60 ◽

Cited By ~ 1

Author(s):

D. J. Warren ◽

J. G. G. Ledingham

Keyword(s):

Blood Flow ◽

Renal Blood Flow ◽

Renal Cortex ◽

Flow Distribution ◽

Rabbit Kidney ◽

Radioactive Microspheres ◽

Injection Dose ◽

Intrarenal Blood Flow ◽

Total Renal Blood Flow

1. Total renal blood flow and its distribution within the renal cortex of the conscious rabbit were studied with radioactive microspheres of 15 and 25 μm diameter. 2. The reliability of the microsphere technique was influenced by microsphere diameter and number (dose). The optimum microsphere diameter for determination of flow distribution in the rabbit kidney was 15 μm and dose 100–150 000 spheres. 3. Spheres of 15 μm nominal diameter were randomly distributed within the renal cortex of adult rabbits. The larger spheres in batches nominally 15 μm in diameter in young rabbits and 25 μm diameter in adult rabbits were preferentially distributed to the superficial cortex. 4. In adult rabbits 15 μm diameter spheres lodged in glomerular capillaries. Larger spheres occasionally lodged in interlobular arteries causing intrarenal haemorrhage. 5. Microspheres of 15 μm caused a decrease in renal clearance of creatinine and of p-aminohippurate when the total injection dose was about 200 000 spheres. These effects were greater when the injection dose was increased to 500 000 spheres. 6. The reduction in total renal blood flow observed with large doses of spheres largely reflected decreased outer cortical flow, as measured by a second injection of spheres, and confirmed by a decrease in p-aminohippurate extraction. 7. The reproducibility of multiple injection studies was limited by these intrarenal effects of microspheres. 8. Total renal blood flow measured in six rabbits in acute experiments by the microsphere technique was 107 ± 12 (mean±sd) ml/min and by p-aminohippurate clearance was 100 ± 10 ml/min. 9. Total renal blood flow in twelve conscious, chronically instrumented rabbits was 125 ± 11 ml/min, of which 92 ± 6 ml/min was distributed to the superficial cortex and 33 ± 4 ml/min to the deep cortex.

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