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2024
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07
Industry New Knowledge... "Ceramics International" ionic liquid direct writing 3D printing to assist in the construction of high-efficiency ceramic-based catalysts for diesel ultra-deep oxidation desulfurization.
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Industry new knowledge
Recently, a team led by Haiyan Ji, School of Materials Science and Engineering, School of Environmental and Safety Engineering, Jiangsu University, published a study entitled Ionic liquids assisted construction of ef ficient ceramic-based catalyst by direct ink writing 3D printing for ultra-deep Ceramics International of diesel in oxidative desulfurizationDirect Ink Writing (DIW)3D printing technology preparationDiesel ultra-deep oxidation desulfurization (ODS)ceramic-based catalysts.
Original link: https://www.sciencedirect.com/science/article/abs/pii/S0272884223043523
Adventure Technology official website: http://www.adventuretech.cn/
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research content
3D printing monolithic catalyst has the advantages of excellent circulation, mass transfer efficiency, heat transfer efficiency and convenience, which has attracted wide attention in the petrochemical industry. But,According to the characteristics of each chemical reaction, the design of the overall catalyst has diversity and difficulties, especially the adjustment of the catalyst ink, the introduction of the active center and the construction of the reaction hole..
In this work,Using direct ink writing (DIW)3D printing technology, a functional ink for oxidative desulfurization (ODS) was customized, and a high-efficiency monolithic catalyst was prepared. The ink contained [C12Vim]3 PMo12O40, zeolite and bentonite, and the formulation was optimized by rheological testing. The finally prepared catalyst 3D-MoO3/BT-MOR achieved a desulfurization rate of 100% in 1 hour. This study provides a new method for the formulation of 3D printing inks and the preparation of monolithic catalysts.
Figure 1,(a) three-dimensional printing overall catalyst preparation process diagram. (B) Extrusion path diagram of 3D printed monolithic catalyst. (c) 3D-BT-MOR,(d) 3D printed monolithic catalyst before sintering,(e) 3D-MoO3/BT-MOR.
2,(a)3D printed boulders in different states. (B) Digital photos of 3D printed catalysts printed on the z axis before and after heat treatment.
△ Figure 3, (a) NH3-TPD pattern of DIW 3D printed catalyst. (B) Size distribution of MOR. (c) and (d) SEM images of MOR.
Figure 4,(a) Simple flow diagram of the rheometer. (B) Apparent viscosity of the ink as a function of shear rate. (c) Yield stress of the ink as a function of shear strain. (d) Storage modulus (G') and loss modulus (G ") of the ink as a function of shear strain. A, C and D represent 3D printing inks with 56%, 47% and 75% moisture content respectively, and B represents 3D printing inks without rock soil (56% moisture content).
5,(a-d) SEM image of 3D-MoO3/BT-MOR. (e) Elemental mapping image of 3D-MoO3/BT-MOR. (Molybdenum, blue; Aluminum, red, oxygen, green, silicon, yellow).
6,(a-b) XRD pattern of DIW 3D printed catalyst. (c) [C12Vim]3PMo12O40 and (d) FT-IR spectra of 3D printed monolithic catalysts.
7,(a) XPS investigation of the sample and (B) Mo3d XPS of the sample. (c) TG-DSC patterns of [C12Vim]3PMo12O40 and (d) 3D-MoO3/BT-MOR green bodies.
△ Figure 8,(a) N2 adsorption-desorption isotherm and B) pore size distribution curve of 3D printed monolithic catalyst and rock crude ore.
Figure 9,(a) different three-dimensional printed monolithic catalysts, (B) different sintering temperatures,(c) different substrates and (d) reaction temperatures of the catalysts. Reaction conditions: V (oil, S content 200ppm)= 7 mL,m (catalyst) = 2.6g,T = 60 ◦ C,V(TBHP)= 20 μL.
10,(a) Catalytic performance of 3D printed monolithic catalyst and its powder. (B) Recovery performance of 3D-MoO3/BT-MOR. (c) A digital photograph of the separation of the 3D printed catalyst.
Δ Figure 11,(a) Catalytic performance with addition of scavenger. (B) ESR detection of free radicals generated during the reaction.
research conclusion
In this study, a monolithic catalyst for ultra-deep oxidative desulfurization of diesel was prepared by direct ink writing (DIW)3D printing technology.The ink formulation was optimized by rheological analysis, and the physical and chemical properties of the 3D printing catalyst were characterized. The 3D-MoO3/BT-MOR catalyst completely removes sulfide within 1 hour, showing excellent catalytic performance and stability. The mechanical property test shows that the catalyst has good stability and strength.This work provides new ideas for the construction and application of 3D printed monolithic catalysts, which are suitable for a variety of catalytic reactions.
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