The flue gas denitrification technology by using selective catalytic reduction(SCR) method widely used and under research at present

as well as catalytic agents system have been sammarized

some factors affecting the SCR process

such as reaction temperature

flue gas velocity in space of the reactor

flow pattern of the flue gas and mixing with ammonia turbulence

as well as passivation of catalytic agent etc.

have been analysed in detail

and preventive measures being put forward. It is indicated that the SCR technology is even though a matured technique

and has high efficiency of flue gas denitrification

but the capital investment and operation cost are very high

becoming the main factors that limit the development and application of SCR method. Hence

the advancement and study target of a low temperature SCR technology which can reduce the entire cost of SCR facility have been presented.