TABLE 1.

Specification of the granular bed

Layer	Material	Weight, g	Depth, mm	Solidity	Pressure drop, Pa @ 0.13 m/s
1. Mesh	Stainless steel	0.85	0.8	0.27	0.8
2. Large beads (1 mm)	Borosilicate	2.6	6.6	0.57	18.7
3. Small beads (0.2 mm)	Soda-lime	1.0	2.2	0.60	250
		1.5	3.2		353
		2.0	4.3		444
4. Large beads (1 mm)	Same as Layer 2
5. Mesh	Same as Layer 1