The POG is a tool to help determine the approaches to control mercury emissions in coal-fired power plants, in many cases a co-benefit of reducing emissions of other pollutants. The POG allows for a preliminary selection of a mercury control strategy for a given power plant. In general, the POG is also applicable to coal-fired large industrial boilers.
The Process Optimization Guidance (POG) summarizes mercury emission reduction practices applicable to coal-fired power plants. Mercury emissions from combustion of coal in power plants and industrial boilers constituted approximately 26 per cent of the global
anthropogenic emissions of mercury in 2005. Therefore, it is important to decrease the amount of mercury emissions from this sector.