Effect of NOx Removal Efficiency according to Space Velocity and Linear Velocity of SCR Catalyst

Abstract

Air pollutants nitrogen oxides are inevitably generated in the combustion reaction. Its amount trend is steadily increasing because the rapid modern industrialization and population growth. For this reason, NOx is controlled to reducing the harmful components in the exhaust gas. So Marine Environment Protection Committee (MEPC) take effect 'Tier I', 'Tier II' of air pollution regulation in 2005 and 2011 respectively. According to NOx emissions are strictly regulated management of the vessel through them. In addition, since 2016 the regulation enter into force in the next step 'Tier III' was confirmed by MEPC 66th committee. It's 80% enhanced emissions limits than the 'Tier I' Alternatively these emission regulation, research is actively being carried out about exhaust gas after-treatment methods through the vessel application of Selective Catalytic Reduction(SCR). Therefore depending on the basic specification of cell density according to the Area velocity, Space velocity, Linear velocity is studied the effects of NOx removal efficiency

Improved Low‐Temperature Activity and H2O Resistance of Fe‐Doped Mn−Eu Catalysts for NO Removal by NH3−SCR

“…It is obvious that an increase in GHSV only resulted in a decrease in SCR activity at lower temperatures, which may be due to the shorter contact time between the reactant gases and catalysts. [37,38] However, an increased GHSV had little effect on H 2 O resistance. NO conversion was maintained at almost 100 % at above 100°C, and the MnÀ EuÀ Fe(1)-500 catalyst also possessed excellent H 2 O resistance, even at a relatively high GHSV of 75,000 h À 1 .…”