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. 2019 Aug 17;5(8):e02324. doi: 10.1016/j.heliyon.2019.e02324

Table 3.

Chemical composition, BET surface area, and micro-pore volume of the synthetic Al–Si catalyst from cogon grass.

Composition (% wt.) Al–Si/20-80 Al–Si/40-60 Al–Si/60-40 Al–Si/80-20
SiO2 73.20 60.90 37.60 21.50
Al2O3 24.30 37.20 61.10 77.90
CaO 0.71 0.53 0.41 0.15
SO3 0.53 0.47 0.29 0.23
P2O5 0.38 0.26 0.19 0.00
Na2O 0.36 0.31 0.19 0.00
MgO 0.16 0.00 0.00 0.00
Fe2O3 0.15 0.12 777 ppm 684 ppm
K2O 0.11 760 ppm 529 ppm 300 ppm
Others 0.10 0.21 0.22 0.22
BET surface area (m2g−1) 102 143 200 163
Total pore volume (cm3g−1) 0.30 0.47 0.72 0.58