Textural properties, density of –SO₃H groups and catalytic activity of different solid acid catalysts.

Samples name	Specific surface area (m2 g−1)			Pore volume (cm3 g−1)			Density of –SO3H groups (mmol g−1)	FFAs conv. (%)
	S total	S micro	S meso	V total	V micro	V meso
SO3H-OMC(s)-6-160	537	116	421	0.85	0.09	0.76	2.32	93.8
SO3H-OMC(k)-6-160	612	138	474	0.90	0.11	0.79	2.09	92.8
SO3H-APC-6-160	34	—	—	0.05	—	—	1.26	89.7
D072	—	—	—	—	—	—	2.74	90.4