SMEDRI successfully developed the SCR products with independent intellectual property rights, the highest conversion rate of NOX can reach 95%, which can meet the requirements of IMO Tier Ⅲ (other standards can be designed). SCR product structure is flexible and compact, can be customized according to customer requirements, selection of well-known brands of catalyst, and the use of unique anti impact packaging technology to meet the requirements of marine environment, and SCR reactor with near 20dB (A) silencing function, can be integrated with muffler design, save the hull space.