LOW-TEMPERATURE DENITRATION METHOD

摘要

PURPOSE:To effectively remove or reduce the NOx from a waste gas in a specified low-temp. region by using this denitration method. CONSTITUTION:A manganese ore wherein the product of the weight fraction of manganese dioxide (MnO2) and the specific surface is controlled to >=5m<2>/g or a manganese ore having three peaks at the diffraction spacing of 2.15+ or -0.05Angstrom , 2.39+ or -0.05Angstrom and 3.11+ or -0.05Angstrom where the peak at 2.39+ or -0.05Angstrom has the highest intensity and the intensity ratio of the peak to the two other peaks is controlled to >=0.2 is used as a catalyst to conduct denitration at 90-150 deg.C. Accordingly, an inexpensive denitration catalyst is provided by utilizing the manganese ore.