Ionic liquids assisted construction of efficient ceramic-based catalyst by direct ink writing 3D printing for ultra-deep oxidative desulfurization of diesel

Abstract

3D-printed monolithic catalysts have attracted extensive attention in the petrochemical industry due to significant advantages of excellent circulation, mass and heat transfer efficiency and convenience. However, according to the characteristics of each chemical reaction, there are diversity and difficulty in the design of monolithic catalysts, especially the regulation of catalyst ink, the introduction of active centers and the construction of reaction pores. In this work, we report a preparation of ceramic-based catalysts with direct ink writing (DIW) 3D printing technology for ultra-deep oxidative desulfurization (ODS) of diesel. Through a series of rheological analyses of catalyst inks, the effects of ink composition and content on fluidity and viscoelasticity are explored for the forming mechanism of high-quality 3D printed inks. Besides, ionic liquids (ILs) [C12Vim]3PMo12O40 and mordenite are cleverly introduced into the 3D printed ink for assisted construction of active center and reaction channel in functionalization of the ODS catalyst. The DBT removal of 3D-MoO3/BT-MOR can reach 100 % and this monolithic catalyst is easy to be separated from oil. This work is deeply focused on the preparation and molding of catalyst inks to achieve efficient monolithic catalysts that provide an excellent path for many industrial oxidation reactions.