Thin-wall honeycomb type low-temperature sulfur-resistant SCR denitration catalyst and preparation method thereof

Abstract

The embodiment provides a thin-wall honeycomb type low-temperature sulfur-resistant SCR denitration catalyst. A catalyst carrier is a titanium dioxide-coated silicon dioxide composite nanotube, an active component is vanadium pentoxide, and a catalytic assistant is molybdenum trioxide and chromium trioxide. The thin-wall honeycomb SCR denitration catalyst with low-temperature sulfur resistance performance is prepared by adopting an extrusion molding process. The catalyst has good low-temperature activity and sulfur poisoning resistance, can solve the problems of low activity and sulfur poisoning of the catalyst in low-temperature flue gas, and is suitable for low-temperature sulfur-containing flue gas; by adding various inorganic and organic forming additives and optimizing the drying androasting processes, the wall thickness of the catalyst is reduced on the basis of maintaining the mechanical strength of the catalyst, the sulfur poisoning resistance of the catalyst is improved, theproduction cost is reduced, and the thin-wall honeycomb type low-temperature sulfur-resistant SCR denitration catalyst has good economic benefits. The embodiment also provides a preparation method ofthe thin-wall honeycomb type low-temperature sulfur-resistant SCR denitration catalyst.

Description

technical field

[0001] The invention belongs to the technical field of environmental protection denitrification catalysis, and in particular relates to a thin-walled honeycomb low-temperature sulfur-resistant SCR denitrification catalyst. The invention also provides a preparation method of the thin-walled honeycomb low-temperature sulfur-resistant SCR denitration catalyst. Background technique

[0002] Nitrogen oxides (NO x ), sulfur dioxide (SO 2 ) and other pollutants have serious harm to the environment and are an important source of air pollution. With the continuous improvement of people's awareness of environmental protection, the pollutant discharge standards formulated by our country are becoming more and more stringent. According to the "Emission Standard of Air Pollutants for Thermal Power Plants (GB13223-2011)", since January 1, 2012, the nitrogen oxide emission of newly built coal-fired boilers should be lower than 100mg / m 3 , the nitrogen oxide emission of n...