Journal of Powder Technology / 2014 / Article / Tab 2

Research Article

Wall-to-Bed Heat Transfer at Minimum Gas-Solid Fluidization

Table 2

Experimental results in the 21.6 cm I.D bed using a 1.0 cm O.D. heater.

Powder (μm) (kg/m3)  (cm/s) (—) (W/m2K) (cm) (W/mK)

Glass beads5528000.320.46616.63.50.58
9628000.950.45718.62.90.54
17328003.60.44220.22.50.51
20828003.80.44022.82.40.55
40728008.20.42521.31.90.40

Angular sand9025401.230.59018.33.30.60
10625401.370.56319.03.20.61
25225405.30.49832.12.60.83
470254019.10.42929.92.20.66
550254029.50.41434.02.10.71
778254050.10.40538.32.00.77

Rounded sand15226501.80.48723.22.60.60
19526503.20.43223.82.40.57
19726503.10.46923.02.40.55
25226504.90.45325.92.20.57
435265016.80.41625.31.80.46

Diakon spheres27011803.30.42623.32.20.51

Catalyst 3815000.170.54516.13.80.61
4615000.230.54312.53.70.46
5816300.260.50412.83.60.46
6416300.280.50214.53.60.52

Note: properties marked * were experimentally determined. Average particle sizes were measured by Malvern laser diffractometry. The absolute particle density was taken from suppliers’ data.