Multi-metal oxide catalyst for catalyzing ozone to oxidize ammonia nitrogen and preparation method of multi-metal oxide catalyst

• Main Authors: ZHANG JIE, GUO TIANFU, XU BENGANG, WU XUEQI, WANG JINLI, ZHANG MI, ZHU YANFANG
• Format: Patent
• Language: Chinese; English
• Published: 29.12.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a multi-metal oxide catalyst for catalyzing ozone to oxidize ammonia nitrogen, and belongs to the technical field of wastewater treatment catalysis. The multi-metal oxide in the catalyst is uniformly dispersed, and the oxide formed after the precipitated salt is roasted and decomposed does not form a solid solution compound. The mass content of the component Al2O3 of the multi-oxide catalyst is 42%-54%; the mass content of NiO is 18%-26%; the mass content of CuO is 22%-38%; and the mass content of MnO2 is 23%-32%. According to the catalyst, under the condition that 10-15 ml/min ozone is introduced, the ammonia nitrogen concentration of wastewater is 230 mg/L, and ammonia nitrogen and chlorine can be reduced by 23.9%. The catalyst is simple in preparation process, and secondary environmental pollution cannot be caused after ammonia nitrogen is oxidized by the catalyst. 本发明公开了一种多金属氧化物催化臭氧氧化氨氮催化剂，属于废水处理催化技术领域。该催化剂中多金属氧化物分散均匀，沉淀盐焙烧分解后形成的氧化物不形成固溶体化合物。该多种氧化物催化剂，其组分Al2O3质量含量42%-54%；NiO质量含量为18