CATALYST HAVING ACTIVITY AT LOW TEMPERATURE FOR EXHAUST SMOKE DENITRATION

摘要

PURPOSE:To provide catalyst having high activity at low temperature comprising a bromide or a chloride of iron on at least one carrier selected from activated alumina, silica-alumina and natural or synthetic zeolite. CONSTITUTION:At least one selected from the group consisting of activated alumina, silica-alumina and natural or synthetic zeolite is impregnated with a solution of iron bromide or iron chloride to support the compound on the carrier. The preferred ratio supporting these compounds on the carrier is in the range of metal (g)/carrier (g)=0.02-0.1. The so-produced catalyst shows high activity at low- temperature. For example, the temperature of exhaust smoke after the treatment of liquid purification is below 18 deg.C even through the required rising of the temperature is taken into consideration. The catalyst shows high denitration rate at low temperature with a very short contact time.