▎ 摘　　要

NOVELTY - Graphene-promoted low-temperature combined desulfurization and denitration catalyst comprises a sodium-Zeolite Socony Mobil-5 (Na-ZSM-5) molecular sieve with a carrier silicon-to-aluminum ratio of 50. The mass ratio of active component vanadium oxide (V2O5) is 7 wt.% of the carrier, the mass ratio of oxalic acid is 7 wt.% of the carrier, and the mass ratio of copper oxide (CuO) is 8 wt.% of the carrier. The mass proportion of the auxiliary cerium oxide (CeO2) is 7 wt.% of the carrier. The mass ratio of graphene oxide is 0.5 wt.% of the carrier. USE - Graphene-promoted low-temperature combined desulfurization and denitration catalyst. ADVANTAGE - The graphene-promoted low-temperature combined desulfurization and denitration catalyst is aimed at the large amount of sulfur dioxide (SO2) and nitrous oxide (NOx) pollutants contained in the flue gas of coal-fired thermal power plants, and precious metals and reducing gas have low production cost, and under the working state of flue gas ambient temperature of 140℃ and oxygen content of 6%, the desulfurization and denitrification efficiency can reach more than 90%, and the catalytic efficiency is high. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene-promoted low-temperature combined desulfurization and denitration catalyst, which involves weighing 0.5 wt.% of the carrier, and the graphene oxide powder in an empty beaker, and adding deionized water for ultrasonic dispersion for 20 minutes, weighing ammonium metavanadate and oxalic acid and placing them in the dispersion, adding deionized water until the medicine is not covered to prepare a mixed solution, grinding a certain quality of Na-ZSM-5 molecular sieve into powder, adding deionized water until the molecular sieve does not pass, placing in an electric heating constant temperature water bath and stirring in a 50℃ water bath for 4 hours, placing in a vacuum drying oven, drying at 120℃ for 6 hours at a constant temperature, roasting at 550℃ for 2 hours in a muffle furnace to obtain the treated molecular sieve, which is added to the mixed solution, mixing the mixed solution, drying the mixed solution, taking out the catalyst, cooling to room temperature, placing the catalyst in a ceramic crucible, and calcining in a muffle furnace at 550℃ for 5 hours to obtain a semi-finished catalyst, weighing copper nitrate and cerium nitrate and dissolving them in a beaker, mixing with the semi-finished catalyst, water bath stirring, vacuum drying and high temperature roasting to prepare the final low temperature combined desulfurization and denitration catalyst.