Manganese Base Of Low Temperature Scr Denitration Catalyst Preparation Molding And Performance Study

Nitric oxide is one of the major atmosphere pollutants. Selective catalytic reduction (SCR) has been recognized as the most effective way to remove nitric oxide from the stationary sources. Recently, low temperature SCR technology has attracted more and more interests for its energy conservation and potential application. In present situation, because the low temperature selective catalytic reduction technology has the active of the catalyst is not enough in the low temperature range, which are the main obstacle of industrial application. In order to solve these problems, this paper systematically investigated the performance of the catalytic based on Mn.In this article, the catalysts based on Mn were prepared by impregnation method. It is systematically that study the performance for low temperature SCR, including the capacity of Mn, the proportion of elementary composition, the reaction temperature, the space velocity and the density of O2, NO, NH3, through the number of experiments. Also, the activity for the low temperature SCR of the catalysts of Nano-support based on Mn were carried out. Furthermore, the catalysts were prepared by impregnation, deposition-precipition, and co-precipitation. It was found that the amorphous structure and the dispersion of active component of the catalysts prepared by co-precipitation method were improved, leading to higher low temperature SCR activity.The resistance to SO2of the catalysts is always the key and difficulty in research field. So the resistance to SO2of the catalysts based on Mn was prepared by impregnation method also investigated. Through the experiment study the catalyst anti-poisoned performance under the condition which is present of SO2or H2O alone and simultaneously existed. And making use of the BET, SEM, XRD, XPS, TG analysis technology to study the catalysts could be regenerated.The moulding method of the catalysts which based on Mn also has been studied:load mould and direct mould. Study performance of the shaped catalysts at the low temperature, and raise the ratio of the shaped catalysts of components.Through this paper system research, it was found that the catalyst based on Mn have the better low temperature catalytic activity and anti-poisoned performance. And the catalyst can recover to the initial activity perfectly by the water-washing regeneration. For low temperature SCR can realize industrial application, this paper designed an industrial feasible low temperature SCR processes, including the gas distribution system, heating system, SCR reaction system, regeneration system, drying system and analysis system. And the hot-test of the catalyst have provided possible guidances for industrial application, which maintained the NO conversion about60%for50h at the total flow rate was60m3/h.