From the precious metal catalyst to today widely used SCR denitration catalyst which is using titanium dioxide as the main catalyst carrier, vanadium pentoxide, tungsten trioxide as main active ingredient, the SCR denitration catalyst has experienced a variety of important technological changes and condensed years of hard work from academics and numbers of plant personnel.

 

However, since the vanadium itself is highly toxic, it’s easy to cause body bronchitis, impaired vision and kidney damage. If the waste catalysts are not recovered, they will do a huge damage to environmental and body, therefore, in the great situation of environmental protection, the user must spend an expensive special costs in the recycling of waste SCR denitration catalyst. Faced with this situation, promoting a new non-toxic catalyst product has become the focus supporting and developing projects for government.

 

Many scholars and manufacturers have made great efforts in this area, also there is a new type of highly efficient, inexpensive SCR denitration catalyst product has been successfully developed. This non-toxic SCR denitration catalyst takes modified rare earth functional ceramics as a carrier, and takes cerium dioxide, tungsten trioxide as the main active ingredients; also it is mixed with a certain amount of zirconium dioxide, glass fibers, and other trace components.

 

Cerium, a silver-gray active metal, its powder is easily spontaneous combustion in the air, can soluble in acid, the highest abundance of rare earth elements. Cerium is easily oxidized at room temperature; therefore, when exposed in the air, it is easy to lose its luster and can even burn by using a knife to rasp in the air. Cerium is mainly as a reducing agent in the catalyst; it can be used as additives in manufacturing cerium salts for manufacturing medicine, leather, special glass, textile and other industries; at the same time, cerium alloy can be used to manufacture jet propulsion components because of its heat-resistant.