The basicity of the doped catalysts was observed to increase up
to 1% of Ba loading beyond which it decreased for Ba1.5 catalyst.
The results for the different Ba loaded catalyst with their basicity
values are depicted in Table 3. The increasing basicity for Ba0.5
and Ba1.0 catalyst might have resulted due to the presence of
BaO and CaO active species. On the other hand in Ba1.5 catalyst
it is already shown in XRD and FT-IR pattern that the CaO species
are reduced and the dominant species are associated only with Ba.
So the catalysts prepared were highly basic in nature compared to
the parent catalyst, but the basicity reduced at higher loading.
The surface areas of the catalyst prepared are presented in
Table 4. The surface area of Ba0.5 was higher than the TS-CaO
catalyst and it decreased with increasing loading. The decrease in
surface area is attributed to the incorporation of barium on to
the CaO surface. The increase in surface area in Ba0.5 catalyst might have occurred due to incomplete dispersion of Ba on the
support.