The Evolution of Emissions Control Technologies to Meet Lower Limits

Presented to: Power-Gen Asia
September 19-21, 2017
Bangkok, Thailand

J.M. Mitchell ; P.N. Roberts ; S.K. Kumar ; J.P. Chenevey - Babcock & Wilcox Barberton, Ohio, U.S.A.


Coal-fired power generation still accounts for the majority of power generation throughout the Asian continent and is expected to grow along with the expanding economies of the region. Advanced emissions control technologies will be required to operate effectively and efficiently to support the evolving environmental regulations of coal-fired power plants in Asia. The United States (U.S.) has experienced significant advancement of emissions control technologies to meet the evolving and more stringent criteria pollutant emissions such as sulfur dioxide (SO2), nitrogen oxides (NOx) and particulate matter (PM) to minimize ambient air concentrations of PM10, PM2.5 and ozone as well as increased visibility. In addition there has been increasing emphasis on the reduction of hazardous air pollutants such as mercury (Hg) and heavy metals.

The primary technologies that have been employed to meet low pollutant emissions have historically been with flue gas desulfurization (FGD), electrostatic precipitators (ESP), low NOx combustion systems, and selective catalytic reduction (SCR). Each of these technologies have advanced and evolved over time to overcome the challenges of meeting lower emissions limits. It is worth further examination into each technology to better understand the current state of the art, and what limitations have been overcome to meet lower emissions. A better understanding of these challenges will help guide emissions control technology selection and operation for new power plants.

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