3. Results and discussion
3.1. Catalyst characterization
3.1.1. Fourier transform infrared (FTIR) spectra
As shows in Fig. 1, the absorption band around 1050 cm–1 arose from
the SiOSi bonds, suggesting the generation of SiO2 in the RHA800.
The adsorption peak at around 991 cm−1 showed the presence of
Si–O–Ca bond in the 30% RHA800-800 catalyst which was an evidence
for loading of CaO on RHA800 surface, and this band was due to the
formation of calcium silicate