SCR Power Plant Abbreviation

Selective Catalytic Reduction

This after–treatment technology reduces NOx emissions by using a urea–based additive, sometimes referred to as DEF. The ammonia in the urea mixes with engine exhaust gases in the SCR catalyst, converting NOx to nitrogen and water vapor.

Silicon Controlled Rectifier

Is a four-layer solid-state current-controlling device. The principle of four-layer p–n–p–n switching was developed by Moll, Tanenbaum, Goldey and Holonyak of Bell Laboratories in 1956.

Selective Catalytic Reactor

Selective Catalytic Reaction