Abstract
Mesoporous 3D aluminosilicates, denoted as AlMFA-8, were one-pot synthesized with two different nSi/nAl ratios using linear alkylbenzene sulfonic acid, LASH, as template. The AlMFA-8 materials were characterized using XRD, N2-adsoption, SEM, HRTEM, XRF, XPS and FT-IR. The results showed that AlMFA-8(x) has large-pore mesoporous solids. The pore volume increases from 1.28 to 1.45cm3/g without significant concomitant decrease of the surface area (≈659m2/g). On the other hand, AlSBA-15(x) materials with the same nSi/nAl ratios were one-pot synthesized by adjusting the molar of nH2O/nHCl in synthesis gel at 276 using P123 as template.The surface acidity of AlMFA-8(x) and AlSBA-15(x) were evaluated and confirmed by NH3-TPD, Pyr-FT-IR, TGA-wax-catalytic cracking, 1,3,5-triisopropylbenzene and n-hexadecane cracking. In addition, commercial silica–alumina (CSi–Al) was characterized and its catalytic activity is compared with the different acid mediated synthesis route, AlMFA-8(x) and AlSBA-15(x). The AlMFA-8(x) showed the higher activity under equivalent conditions in comparison to AlSBA-15(x) and CSi–Al materials.
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