. 2019 May 21;9(28):15941–15948. doi: 10.1039/c9ra02546d

Textural properties, density of –SO₃H groups and catalytic activity of reused SO₃H-OMC(s)-6-160 catalyst samples.

Reuse times of catalyst samples	Specific surface area (m² g⁻¹)			Pore volume (cm³ g⁻¹)			Density of –SO₃H groups (mmol g⁻¹)	FFAs conv. (%)
Reuse times of catalyst samples	S _total	S _micro	S _meso	V _total	V _micro	V _meso	Density of –SO₃H groups (mmol g⁻¹)	FFAs conv. (%)
Fresh	537	116	421	0.85	0.09	0.76	2.32	93.8
First reuse	517	112	405	0.81	0.09	0.72	2.18	90.1
Second reuse	496	113	386	0.77	0.08	0.69	2.07	87.3
Third reuse	487	110	377	0.76	0.08	0.68	2.02	85.9
Fourth reuse	485	113	372	0.75	0.08	0.67	1.98	85.5
Fifth reuse	484	108	378	0.75	0.08	0.67	1.97	85.2

Textural properties, density of –SO3H groups and catalytic activity of reused SO3H-OMC(s)-6-160 catalyst samples.