Preparation method and application of Mn-based low-temperature C3H6-SCR catalyst

• Main Authors: GUO FANG, TANG TIAN, SHENG XIAOHONG, ZHANG QIANG, XU JUNQIANG
• Format: Patent
• Language: Chinese; English
• Published: 28.03.2023
• 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

The invention relates to a preparation method of a Mn/ZSM-5 catalyst prepared by adopting a dielectric barrier discharge plasma synergistic coprecipitation method and application of the Mn/ZSM-5 catalyst in denitration of nitrogen oxides. The catalyst is prepared by using ZSM-5 as a carrier and transition metal Mn as an active component through a coprecipitation method. The preparation method comprises the following steps: weighing Mn (NO3) 2.4 H2O according to a stoichiometric ratio, adding a proper amount of deionized water to dissolve the Mn (NO3) 2.4 H2O, adding a metered ZSM-5 molecular sieve, adding an alkaline precipitator, adjusting the pH value to 9-11, stirring for 2-4 hours, aging for 1-3 hours, filtering and washing the obtained solution until the pH value is unchanged, drying in a 110 DEG C oven for 12 hours, and then carrying out DBD plasma treatment, tabletting and grinding into a 20-40-mesh catalyst, namely the Mn/ZSM-5 catalyst. The Mn/ZSM-5 molecular sieve catalyst disclosed by the invention