Efficient Production of Methyl Oleate Using a Biomass-Based Solid Polymeric Catalyst with High Acid Density

Table 1

The BET and acid density comparison different catalysts.

Sample	SBET (m^2/g)	Pore volume (cm^3/g)	Pore diameter (nm)	Total acid density (mmol H^+·g^-1)	Ref.
HS/C-SO3H	470	0.40	4.2	2.10	[11]
FCHC-SO3H	41.4	0.085	6.4	1.20	[18]
β-Cyclodextrin
-SO3H	0.18	-	4.74	3.00	[21]
Bamboo acid	0.25	-	-	1.74	[30]
CS	2.18	0.006	11.4	-	This work
CS-SO3H	1.21	0.003	11.1	3.81	This work