An innovative mechanism of creating H1 and H3 pore types in AlSiO4 and its catalytic application to convert waste plastic into aviation fuel

Abstract

ABSTRACT FeAlSiO4 -H3 and ZnAlSiO4-H1 are synthesized through the facile method without an autoclave. Tetraethylenepentamine (TEPA) is a structure-directing agent. FT-IR, XRD, BET, TPD, TGA, and TEM confirmed the framework, crystallinity, porosity, acidity, thermal stability (above 600°C), and surface morphology respectively. BET analysis revealed that two distinct pore widths (FeAlSiO4-H3: 13.79 nm, ZnAlSiO4-H1: 11.65 nm) are based on the metal ion substitution The acidity (FeAlSiO4 -H3:6.576 and ZnAlSiO4-H1:13.836 cm3/g STP). In ZnAlSiO4 – H1, 7 template molecules form a linear complex with 6 Zn2+ions which is oriented vertically to create cylindrical pores. In FeAlSiO4-H3, 8 template molecules are formed a linear complex with 7 Fe2+ which is positioned in a cross-sectional way to produce slit pores. The catalytic cracking of polypropylene has been carried out over FeAlSiO4 and ZnAlSiO4 and observed that the conversion is 100%. H3 type pore has produced higher selectivity of jet fuel (90%) than the H1 type pore (86%) at 0.5 g catalyst dosage. In addition to that, H3 type has produced diesel (3.8%) and H1 type has produced petrol (10.1%) as a minor product. The synthesized aviation fuels are equivalent to JET A-1 fuel and are characterized by FT-IR, HPLC, and GC-MS.