(337g) 3D-Printed Zeolitic Scaffolds for Selective Transformation of Light Alcohols to Light Olefins

This study aims at developing novel structured zeolite monoliths with various compositions by using three dimensional (3D) printing techniques to promote the production of light olefins and catalyst stability in selective transformation of light alcohols. 3D-printed ZSM-5 and silicalite-1 monoliths were coated with a thin layer of SAPO-34 zeolite. Characterization results indicated that the 3D-printed monoliths were highly porous and their micropore surface area and pore volume further increased by consequent coating with SAPO-34 zeolite. The catalytic results showed that the thin layer of SAPO-34 on 3D-printed MFI structures impeded the gaseous mas transport but favored the production of light olefins. The total acidity of SAPO-34/3D-printed ZSM-5 structure was higher than both SAPO-34/3D-printed silica and uncoated 3D-printed ZSM-5 monolith which favored the light olefins production. Coating 3D-printed HZSM-5 monolith with SAPO-34 enhanced the ability to produce olefins while circumvented the quick coke formation. These results demonstrated that selectivity and reaction rate in dehydration of light alcohols to light olefins can be modulated by changes in catalyst topology and morphology.