Lately, nox reduction achieved by ammonia has been at the forefront of cutting-edge technology. This is because such technology helps overcome environmental problems resulting from harmful nitrogen oxide(en) emissions [1]. The process involves using a chemical reaction with ammonia to convert Nox to unreactive nitrogen and water vapor. The key is to add ammonia gas (NH3) at high temperature into the exhaust gas stream of a combustion process,such as coal-fired power stations or vehicles. A selective catalytic reduction (SCR) system in which ammonia is injected into the exhaust stream of a process that combusts fuel, for example would be found inside plant rooms at power stations or the back of automobiles. Technological features include the use of high-efficiency catalysts that permit the reaction to take place at relatively low temperatures, and advanced control systems which manage ammonia dosage to make it as effective as possible. Cross-industry applications are prevalent, ranging from automobile manufacturing to power generation. This variety makes ammonia SCR a versatile choice forNoxemission control.