HONEYCOMB CATALYST PREPARED BY UTILIZING ULTRASONIC DOUBLE-ATOMIZATION METHOD, AND USE OF SAME FOR CATALYTIC OXIDATIVE DEGRADATION OF VOCS

• Main Authors: YE, Xuhua, LU, Guanghui, XU, Zeyue, ZUO, Shixiang, YAO, Chao, LI, Xiazhang, WU, Fengqin, GUI, Haoguan, WANG, Liang
• Format: Patent
• Language: Chinese; English; French
• Published: 21.12.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

A honeycomb catalyst prepared by utilizing an ultrasonic double-atomization method, and the use of same for the catalytic oxidative degradation of VOCs. The method comprises: firstly, carrying out nitric acid acidification and ethanol hydrothermal activation after a honeycomb carrier is pretreated; weighing a soluble inorganic metal salt solution as a reaction solution, taking ammonia water as a precipitant, and respectively placing the reaction solution and a solution of the precipitant in an ultrasonic atomization device for atomization; and introducing a mist into a closed reactor provided with a surface-treated honeycomb carrier, wherein micro-mist droplets collide in the air and are subjected to a contact reaction on the surface of the honeycomb carrier, so as to produce a hydroxide precursor on the surface of the honeycomb, and then drying and calcining same to obtain a honeycomb-supported transition metal oxide monolithic catalyst. The method is simple in terms of process, and is green and economical;