Describes international technologies for controlling NOx emissions, primarily from coal combustion. Over 115 control systems are documented with, as available, system descriptions, process applications, pollution reduction capability, system diagram, supplier/manufacturer.Part I: NOx Emissions from Coal Combustion Introduction Nitrogen Chemistry Effects of Nitrogen Oxides Emission Sources and Concentrations Transport and Deposition of NOx Region Emissions, Concentrations and Legislation Impacts of Legislation and Future NOx Emissions Conclusions References Part II: NOx Control Technologies for Coal Combustion Introduction NOx Formation Regulations on NOx Emissions Control of NOx Emissions Through Combustion Measures Selective Catalytic Reduction Selective Non-Catalytic Reduction Combined SOx/NOx Processes Advanced Combustion Technologies Costs of NOx Control Overview of Activities to Reduce NOx from Coal-Fired Plants in Different Countries Summary ConclusionsDescribes international technologies for controlling NOx emissions, primarily from coal combustion.