We mainly provide our NO_x  emission reduction services through SCR and SNCR technologies. SCR is a  post-combustion method which addresses NO_x emission after their  formation. SNCR and low-NO_x combustion are combustion control methods  which prevent the formation of NO_x emission during the combustion  stage.

SCR

 SCR or Selective Catalytic Reduction is  the most commonly-used post-combustion denitrification technology world-wide.  SCR converts NO_x with the aid of a catalyst introduced nitrogen gas  and water. SCR has also become the mainstream post-combustion denitrification  method in the PRC because of its high reliability, use of advanced technology  and high NO_x removal efficiency. We were among the first domestic  companies to research, develop and use this cutting-edge SCR technology in the  PRC and pioneered many projects. For example, Diandong Power Plant 4*600 MW,  Weixin Intergrated Project Phase One 2*600 MW and so on. Our technologies for  the flue gas denitrification have gained 11 patents (four of them are integrated  denitrification and desulfurization technology) in the PRC.

SNCR

 We also provide selective non-catalytic  reduction or SNCR denitrification services, based on a denitrification method  used in the boiler and which can be used together with low-NO_x  combustion methods or SCR methods to effectively control formation of, and to  remove, NO_x in the boiler. As of September 30, 2017, based on SNCR  denitrification technology, we have completed the Shanxi Yuguang Unit Project  (2*300MW) and we are constructing the Shanxi Shouyang Power Generation Units  (2*350MW) and will further explore new market opportunities in this  area.