Effect of mixed templates on synthesis of SAPO-34 and its catalytic performance on MTO reaction

Effect of templating on the catalytic performance of SAPO-34 catalyst have been investigated in conversion of methanol to olefins. SAPO-34 catalysts were synthesized using a different combinations of morpholine, tetraethyl ammonium hydroxide (TEAOH) and triethylamine (TEA) as structure-directing agents during synthesis of gel with nominal composition as 1Al2O3: 1P2O5: 0.4SiO2: 2y TEAOH: 2x TEA: 2(1-(x+y)) morpholine: 70H2O. The different SAPO-34 samples were characterized by XRD, SEM, FTIR, BET, EDX and TPD techniques. The catalytic performance of the synthesized catalysts was tested in MTO reaction at 410C and a feed WHSV of 6.5h-1. The catalyst synthesized by combination of tri-templates with molar ratios of 0.5 MOR: 0.5 TEA: 1 TEAOH exhibited highest light olefin’s yield (88.7%.wt) in 100% methanol conversion owing to highest crystallinity and smallest particle size

کلیدواژه ها:

MTO reaction ، Light Olefin ، SAPO-34 ، Template