A preparation method of a
honeycomb flue gas
denitrification catalyst capable of reducing
activation temperature and SO2
oxidation rate comprises the following steps: dissolving a
titanium source precursor into acid to form a solution; dissolving a
molybdenum source precursor and a
phosphorus source precursor to form solutions; uniformly mixing the solutions, adjusting the pH value to 7-12, precipitating, filtering, then adding deionized water, a
vanadium source precursor solution, uniformly mixing, directly
drying,
roasting, and
grinding into
powder; adding an
extrusion aid, the solution formed by the
molybdenum source precursor and a pore-forming agent into the
powder, adding water while stirring, blending into a paste, then adding nanometer
silicon dioxide,
glass fiber and a bonding agent, uniformly mixing, extruding into a
honeycomb blank by using an extruder, impregnating the dried blank into a
silicon source precursor solution, and
roasting to obtain a finished product. The invention aims to overcome the defects that in the prior art, the
denitrification catalyst is unbalanced in active centers in
flue gas, high in SO2
oxidation rate and poor in poisoning resistance.