Table 2. Textural Properties of AC-SO₃H and Amberlyst 70.

	surface areaa	pore volumea	pore sizea,b	particle sizec	H2O adsorptiond
catalyst	m2 g–1	cm3 g–1	nm	μm	mL g–1
AC-SO3H	1.0 × 103	0.84	2.1	10–100	1.4
Amberlyst 70e	36	0.002	22	500	1.3

^aThe BET surface area, pore volume, and average pore size were calculated from nitrogen adsorption isotherms.

^bGCMC method.

^cParticle size was determined using FE-SEM.

^dH₂O adsorption capacity was determined using a thermogravimetric method.

^eData of Amberlyst 70 from supplyer^35,36