Hydrothermal Synthesis of High Crystalline Silicalite from Rice Husk Ash

Table 1

The chemical compositions and BET surface areas of silica sources.

Silica source	RHA	SG
Chemical composition, %wt.
SiO2	98.78	99.29
Al2O3	0.52	0.52
MgO	0.12	ND.
CaO	0.36	ND.
Others	0.22	ND.
BET surface area, m^2/g	246.91	790.33