Acidic mesostructured aluminosilicates assembled from economic acidic template characterized by catalytic cracking reactions

作者：Betiha Mohamed A^*; Menoufy Mohamed F; Al Sabagh Ahmad M; Hassan Hassan M A; Mahmoud Sawsan A

来源：Microporous and Mesoporous Materials, 2015, 204: 15-24.

DOI：10.1016/j.micromeso.2014.10.043

• AlMFA-8 mesoporous molecular sieve
• Acidic properties
• 1,3,5-Triisopropylbenzene
• Wax catalytic cracking
• n-Hexadecane cracking

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, N-2-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 1.45 cm(3)/g without significant concomitant decrease of the surface area (approximate to 659 m(2)/g). On the other hand, AlSBA-15(x) materials with the same nSi/nAl ratios were one-pot synthesized by adjusting the molar of nH(2)O/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.

• 出版日期2015-3-1