| abstract |
The invention provides a preparation method of a high-sulfur-resistance and low-temperature SCR catalyst. The method comprises the following steps: mixing cerium nitrate hexahydrate a and manganese nitrate solution, adding ethylene glycol for hydrothermal reaction, cooling, centrifuging, drying and roasting. , to obtain MnCeOx solid solution microspheres; glucose and p-phenylenediamine were dissolved in deionized water, added MnCeOx solid solution microspheres for hydrothermal carbonization reaction, cooled, washed, and dried to obtain N-doped porous carbon-coated MnCeOx@C Materials; metal salts and cerium nitrate hexahydrate b were mixed and dissolved in deionized water, N-doped porous carbon-coated MnCeOx@C materials were added, ultrasonically dispersed, and calcined under N for 3 h to obtain a high-sulfur-resistance and low-temperature SCR catalyst . The catalyst of the invention utilizes the multi-shell structure to confine denitration active sites, SO 2 adsorption sites and metal active sites for catalytic decomposition of ABS in sequence, so as to solve the problems of ABS deposition and metal sulfation caused by co-adsorption of NH 3 and SO 2 on the denitration active sites. , with high-concentration SO 2 poisoning resistance and high-efficiency and stable low-temperature denitration performance. |