Preparation And Application Of Modified Carbon-based Catalyst On Low-temperature Selective Catalytic Reduction Of Denitration

NOx is mainly composed of internal combustion engine and the industrial process of NO and NO2.Due to the NOx emissions harm is serious, denitration received great attention in the field of environmental protection. For the control of NOx emissions need to study effective denitration catalyst.At present, high temperature and denitration technology has been very mature, such as: the denitration technology of coal-fired power plants above 350?, there are a lot of mature high temperature selective catalytic reduction (SCR) catalysts. But Chinese coking industry and a large number of civilian boiler flue gas, need effective denitration catalyst at low temperature. In the catalyst carrier, activated carbon has the characteristics of cheap is easy to be industrialized. So in this paper, I'm studying the carbon on low temperature of denitration.First of all, It was found that:at 80?,oxidative modification of activated carbon has the highest specific surface area and entrance, and the temperature modification of activated carbon on the NO removal rate is highest, the denitration rate steady at 30%.In order to improve the catalyst's denitration performance, the use of impregnated metal liquid metal oxide catalyst load. Add urea in pickling liquid, not only can provide some NH3, and can make the metal oxide load evenly has better dispersion. In 100?, the space velocity conditions for 7500h-1, load 5% of MnOx and 5% of Fe2O3 modified carbon base catalyst has the best denitration performance, the initial denitration catalyst rate is almost 100%, later denitration rate steady at 86%.Experiment also found that add rare metal Ce, Co is helpful to improve the denitration rate. Paper studied the catalyst life in low temperature, the study found that the catalyst in continuous denitration 40h (100?,7500h-1) still has a denitration rate of 72%.Finally, in this paper, the preparation of catalyst and technology engineering co., LTD., Jinan group to carry on the project cooperation, with 6#,7# coke oven flue gas parameters of Jinan as the reference implementation pilot, results of pilot are similar to laboratory experimental.