Table 2. Properties and Compositions of Catalysts.

type	HF
Main Chemical Components, wt %
MoO3	21.76
NiO	6.38
SiO2	5.48
Na2O	0.29
P2O5	4.27
Al2O3	balance
Main Physical Characteristics
shape	trilobe
SBET, m2 g–1	217
pore volume, cm3 g–1	0.45
bulk density, cm3 g–1	0.75
pore diameter, nm	6.5
Mean Particle Diameter, mm
mean particle length	1.8