Manufacturing Method of High Density Titanium Dioxide Powder for De-NOx Catalyst

摘要

nitrogen oxides (NOx) are industrial processes such as combustion and heating as well as energy, waste incinerators, hot has been discharged from the combustion reaction is present everywhere, selective reduction catalyst in order to reduce it (Selective Catalytic Reduction, SCR) method has been used. The ceramic honeycomb catalyst is used mainly in his catalyst, which is obtained by molding a catalyst raw material powder into a honeycomb shape, drying and firing, and the product is used, the catalyst material powder is composed of, most nano-sized titanium dioxide. Ceramic honeycomb-type catalyst is used, the cell density is mainly 11 ~ 45cpsi, which in contrast to a selected cell density and the nature of the combustion of fuel usage, the present invention is a ceramic that is the cell density of the cell thickness 35cpsi thin high strength is lowered in the manufacture of a honeycomb-type catalyst, and to prepare a nano-sized titanium dioxide to increase the mechanical strength than the NOx removal efficiency is decreased. The invention is concentrated and dissolved in sulfuric acid and hydrolyzed to the wongwangseok step, divided into a step of filtration washed with water, dried and fired to the process, the ceramic honeycomb catalyst in particular increasing the density of the raw material through the hydrolysis step and the condition of the firing process control improve the strength, to provide a method for producing nano-sized titanium dioxide in the NO x removal performance can be maximized through the pore adjustment.