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Yu, Chang‐Ping; Yu, Yue-Hwa

doi:10.1023/a:1005608113423

Cited by 8 publications

(2 citation statements)

References 15 publications

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“…Since the physical meaning of the thermal conductivity was proposed by Fourier in 1822, a series of thermal-conductivity measurement methods for catalysts were advanced by many researchers [1][2][3][4][5][6][7]. Sehr [1] presented a comparison of three different measurement methods and the thermal conductivity of five different catalysts or carriers.…”

Section: Introductionmentioning

confidence: 99%

“…Mischke and Smith [4] determined the effective thermal conductivity for several densities of alumina pellets under vacuum and atmospheric pressure using the spherical envelope method. Yu et al [7] used a new steady-state method to measure the thermal conductivities of porous solid catalyst pellets. Measurements on other materials with different methods have been reported elsewhere [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Conductivity of Cobalt-Based Catalyst for Fischer–Tropsch Synthesis

Zhang

Ying

et al. 2010

Int J Thermophys

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In this study, the thermal conductivity of cobalt-based catalyst specimens in the temperature range from 160 • C to 255 • C are measured via a steady-state apparatus. The apparatus and procedures are applied to several specimens of cobalt-based catalyst powder compacts. Specimens with different degrees of porosity are produced by pressing cobalt-based catalyst powder with a particle size of (80 to 360) mesh. The thermal conductivity of cobalt-based catalyst powder compacts is investigated as functions of temperature, specimen density, porosity, and powder size. The results indicate that the thermal conductivity of the catalyst specimens increases linearly with temperature and density and is practically independent of the particle size of the powder in an atmosphere of air, while the porosity dependence of the thermal conductivity is inverse to that of density. In addition, the effects of some measuring factors on the thermal conductivity show that the reliability of the thermal conductivity measurements of cobalt-based catalyst specimens are influenced easily by parallelism, specimen roughness, and moisture content, whereas the specimen thickness and water bath temperature have only a slight effect on the reliability. A Cu Cross-section area of copper heat probe (m 2 ) A S Cross-section area of specimen (m 2 ) L 1Horizontal distance between two thermocouples welded on the lower heat probe (m) L 2 Distance between the measuring end of the upper heat probe and thermocouples welded on the lower heat probe (m) L S Thickness of specimen (m) R Correlation coefficient R Total thermal resistance (km 2 · W −1 ) t 1 , t 2 Temperatures of the lower heat probe ( • C) t 3 , t 4 Temperatures of the upper heat probe ( • C) Greek Symbols λThermal conductivity (W · m −1 · • C −1 ) λ Cu Thermal conductivity of copper heat probe (W · m −1 · • C −1 ) δL S /L S Measuring error of specimen thickness δ D/D Measuring error of specimen diameter δ t/tMeasuring error of temperature difference

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