Thus, the experimental results indicated that the calcination temperature of 800 °Cwas deemed as the ideal temperature.
It was reported that calcination temperature could affect the surface area and basicity of the catalyst [28].
As indicated in Table 2, the catalyst showed the highest total basicity and surface area at calcination temperature of 800 °C,
leading to the superior catalytic activity of the catalyst.
A further increase in the calcination temperature was found to reduce the surface area because of the sintering of crystalline CaO [15].