catalytic conversion of methanol to propylene using h-[b]-zsm-5 borosilicate in a fixed-bed reactor

Two h-[b]-zsm-5 zeolites were synthesized using silicic acid and aerosil 200 as the silica sources with the seed-assisted hydrothermal technique. the catalytic performance of zeolites was studied in methanol to propylene (mtp) reaction at 480 ᵒc using a fixed-bed tubular reactor. to compare, an industrial zsm-5 zeolite from sud-chemei was also studied and referenced. the synthesied catalysts were characterized with a variety of investigating methods including xrd, fe-sem, n2 adsorption-desorption, ft-ir, and xrf analyses. the results revealed that the zeolite prepared by silicic acid (sa) proposed a high yield of propylene in mtp reaction (136 g/g catalyst) much higher than the other studied catalysts. the activation time of sa was also noticeable (up to 110 h in methanol whsv of 8 h-1 and feed meoh/h2o of 90/10), which was 1.5 times that of the industrial catalyst.