Correlation of the NOx Emission and Required Area for Designing SCR Facility in Gas Engine Power Plant Based on the Emission Regulation

To substitute existing power plants with cleaner and environmental-friendly fuel, developing a gas engine power plant (GEPP) is the most appropriate option. GEPP has a lesser emission than common fossil power such as coal-fired, gas turbine, and diesel engine power plants and currently is the best open cycle power plant. The mentioned emissions are nitrous oxide (NOx), sulfur dioxide (SO2), particulate matter (PM), and even carbon dioxide (CO2). This study emphasizes NOx emission as the object. Due to the necessity of more environmentally friendly energy sources in the future, NOx emission regulation may be stringent. Gas engines may need to install NOx reduction equipment such as selective catalytic reduction (SCR) and its facilities whenever it happens. The one that shall be considered is the chemical reactant storage which needs quite a large area to be applied. This study gives a perception to the design engineer of a gas engine power plant on how to estimate the additional space needed when NOx emission regulations become more stringent. The required area estimation will be in the function of ammonia injection dosage, engine specification, fuel specification, operational capacity factor, ammonia purity, and storage time, considering NOx emission regulation.