Bionic structure monolithic catalyst preparing method based on 3D printing technology

Abstract

The invention provides a bionic structure monolithic catalyst preparing method based on the 3D printing technology and relates to preparation of catalysts. The bionic structure monolithic catalyst preparing method based on the 3D printing technology comprises the following steps that (1), a piece of spongy bone is cut off from the end of animal bone, steeped in trichloro ethylene to remove greaseand subjected to ultrasonic treatment, and a porous spongy bone sample is obtained; (2), the spongy bone sample obtained in the step (1) is subjected to Micro-CT scanning, and a series of Micro-CT images of the spongy bone sample are obtained, reconstruction is carried out on the Micro-CT images, and a three-dimensional digital model of the spongy bone sample is obtained; and (3), the 3D printingtechnology is adopted for carrying out 3D printing on the three-dimensional digital model obtained in the step (2), and a bionic structure monolithic catalyst is obtained. The bionic structure monolithic catalyst has excellent mechanical performance, the pressure drop occurring when gas passes through the catalyst can be effectively reduced, energy consumption can be reduced, and the bionic structure monolithic catalyst can be widely applied to the fields such as catalytic reactions.

Description

technical field [0001] The present invention relates to the preparation of catalysts, in particular to a preparation method of a biomimetic structural integral catalyst based on 3D printing technology. Background technique [0002] In industry, catalysts are usually filled in fixed-bed reactors in the form of granular packing. Fixed bed reactor catalysts have many disadvantages such as large pressure drop and poor heat transfer. For strongly exothermic reactions, poor heat transfer can lead to the formation of hot spots in fixed bed reactors, leading to catalyst deactivation. In addition, due to the random filling of the catalyst particles, the residence time of the reactants in the reactor is also different, thereby reducing the selectivity of the reaction. To solve these problems, monolithic catalysts have been developed. [0003] The monolithic catalyst is applied to the processor of automobile exhaust for the first time, and its channel is a honeycomb straight channel...

AI Technical Summary

Problems solved by technology

However, due to the lack of radial mass transfer and heat transfer, when a catalyst with this structure is applied to a catalytic reaction, the reactant cannot fully contact the active site of the catalyst, causing the reactant to leave the catalyst without fully reacting, and the reactant low conversion rate

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