NH_3 selective catalytic reduction (SCR) of nitrogen oxides (NO_χ) over activated sewage sludge char

摘要

The de-NO_χ performance of sewage sludge chars activated physically using water vapor or chemically using KOH was evaluated. Characteristics of chars activated under different activation temperatures, water vapor concentrations, and KOH/char ratios were analyzed by N_2 adsorption-desorption and FT-IR. Chemically activated chars were more efficient in removing NO_χ due to their higher surface area, oxygen functional group and NH_3 adsorption than physically activated chars. The de-NO, performance of the activated chars is influenced more by chemical properties such as oxygen functional groups and NH_3 adsorption sites than by physical properties like specific surface area and pore volume.