Poisoning and regeneration of commercial V2O5-WO3/TiO2 selective catalytic reduction (SCR) catalyst in coal-fired power plants

Abstract

The NOx emitted from coal combustion can cause great harm to the environment and human health. The selective catalytic reduction (SCR) deNOx technology is a mature commercial deNOx technology, of which the SCR catalyst is the core. In China, the SCR deNOx technology has covered almost every coal-fired power plant since the 13th Five-Year Plan. Due to the complex and harsh working environment at the operating site, these catalysts will face the deactivation and replacement. This paper presents a comprehensive and systematic review of commercial V2O5-WO3/TiO2 SCR catalyst from three aspects, including composition and deNOx characteristics, poisoning, and regeneration, based on studies published in the recent years. It has an important guiding significance for the poisoning study and regeneration technology development of commercial SCR catalysts.