Catalyst with beta molecular sieve wrapped double-yolk-egg-shaped structure as well as preparation method and application of catalyst

• Main Authors: GUO LISHENG, ZHANG CHENGHUA, QU FAN, WEI YUXUE, SUN SONG
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2023
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a catalyst with a beta molecular sieve coated double-yolk-egg-shaped structure and a preparation method and application thereof.The surface of a Cu/ZrO2 catalyst is modified, the Cu/ZrO2 catalyst is coated with a protective film to form a core-shell structure, and the special outer coating layer has a coating stabilizing effect on metal nanoparticles, so that the surface of the Cu/ZrO2 catalyst is protected; after the inner core metal particles in the core-shell structure are coated with the outer shell layer, the surface electrical property of the nanoparticles is unprecedentedly improved, and the corresponding surface activity is also in a growth trend, so that a good precondition is provided for reducing agglomeration among the nanoparticles; moreover, the core metal particles are separated from the external environment, so that the core metal particles are effectively protected from being influenced by the external environment, the possibility of additional oxidation and hydrolysis