In a previous study [9], the relationships between the adsorption
capacity and physical properties were investigated for toluene
and MEK on various zeolites, followed by an examination of the
corresponding zeolite regeneration by microwave heating. It was
shown that faujasite showed the greatest adsorption capacity
due to the high value of specific surface area and pore volume.
Among the physical properties of zeolite, most of the previous
experimental studies dealt with N2 gas physisorption data (specific
surface area and pore volume) and the adsorbed amount of toluene
and MEK. However, zeolites possess many unique properties such
as high adsorption capacity, molecular-sieving effect, thermal stability,
and strong acid sites. In addition, the adsorption property of
zeolites relates deeply to Si/Al ratios, cation types, pore structures,
and acidities [10–12]. Therefore, the effects of these other important
parameters were also needed to gain information on the relationships
between physicochemical properties and the adsorption
behaviors of VOCs on zeolites.