Table 2. BET Surface Area of the RC-ITB Catalyst Compared with Other Findings.

source of catalyst	BET surface area (m2 g–1)	reference
RC-ITB	9.312	this study
biomass fly ash	9.0280	(32)
eggshell ash	30.7	(31)
walnut shell ash	8.8	(36)
eggshell nanocatalyst	8.0142	(37)
calcined commercial CaCO3	1.7364
KNO3-loaded coffee husk ash	2.251	(24)