▎ 摘　　要

NOVELTY - Graphene titanium-based core-shell structured low temperature selective catalytic reduction (SCR) anti-sulfur catalyst comprises manganese-cerium-titanium-containing composite nano active component and graphene as carrier. The size range of catalyst is 20-200 nm. The molar ratio of manganese, cerium and titanium is 0.05-1:0.05-1:1. The mass ratio of graphene carrier and active component is 0.01-0.6:1. USE - Graphene titanium-based core-shell structured low temperature selective catalytic reduction anti-sulfur catalyst. ADVANTAGE - The catalyst structure protects the active site of the catalyst, and has graphene to reduce the accumulation of ammonium salt thus enhancing the anti-sulfur ability of denitration catalyst. DETAILED DESCRIPTION - Graphene titanium-based core-shell structured low temperature selective catalytic reduction (SCR) anti-sulfur catalyst comprises manganese-cerium-titanium-containing composite nano active component of formula (MnOx-CeO2@TiO2) and graphene as carrier. An INDEPENDENT CLAIM is included for preparation of catalyst comprising preparing MnOx-CeO2 composite nanoparticle by mixing 20% cerium nitrate and manganese nitrate solution, gradually adding 6 mol/L sodium hydroxide solution, transferring mixed liquid into hydrothermal kettle, reacting at 120-240 degrees C for 12-48 hours, centrifuging, washing alternately with deionized water and ethyl alcohol, drying solid at 80-120 degrees C, calcining at 300-600 degrees C for 1-4 hours; preparing MnOx-CeO2@TiO2 core-shell nanoparticle by mixing 1.5-10 wt.% cetyltrimethylammonium bromide, 20-40 wt.% cyclohexane and balance n-amyl, stirring to prepare into transparent buffer solution, adding MnOx-CeO2 composite nanoparticle, dispersing, adjusting pH to 2.5-5.5 with nitric acid, adding n-butyl titanate ethanol dispersion, ultrasonically reacting, centrifuging, alternately washing with deionized water and ethanol, drying at 80-120 degrees C, and calcining at 300-600 degrees C for 1-4 hours; mixing 5-20 wt.% graphite, 5-20 wt.% sodium nitrate, 20-50 wt.% potassium permanganate, and balance concentrated sulfuric acid, stirring for 2 hours into black green paste in ice water bath, placing in 35 degrees C water bath, maintaining for 30 minutes, slowly adding 10 ml deionized water, placing solution at 80-120 degrees C for 3 hours, treating with hydrogen peroxide mixture, centrifuging, filtering, washing to remove sulfate ion to obtain solid mixture, dispersing solid in water, sonicating for 1 hour; adding MnOx-CeO2@TiO2 core-shell nanoparticle catalyst to graphene oxide water solution, stirring for 12 hours, washing with 10% hydrochloric acid and hydrogen peroxide solution repeatedly to remove impurity, and drying.