摘要
The influences of steam and sulfide on the efficiency of NOx reduction using ammonia(NH_(3))over the nanometer-class V-W/Ti catalyst in conditions of high temperature is experimentally investigated using a steady-flow reactor.The results showed that selective catalytic reduction(SCR)is inhibited by H_(2)O at low temperature,but higher NO conversion efficiency is achieved at high temperature since the reaction of NH_(3) oxidized by O_(2) to NOx is inhibited by H_(2)O.The activity of SCR is promoted by SO_(2) in the temperature range of 200~500℃,the NO conversion efficiency was improved to 98%from 94%by adding SO_(2).SCR would be improved at 350~500℃ when H_(2)O and SO_(2) exist at the same time.Furthermore,the positive influence to the NOx conversion was proved in the presence of H_(2)O and SO_(2) as a result of the European Stationary Cycle test.
基金
supported by the Ministry of Science and Technology of the People’s Republic of China[Grant number 2017YFC0211305]
the Science Fund of State Key Laboratory of Engine Reliability[Grant number Skler-201610].
