摘要
富氧燃烧技术是实现CO_2捕获的重要方式,研究表明其特有的烟气压缩纯化过程可实现NO_x、SO_2的协同脱除。本文在可在线监测的加压实验台架上开展实验,探讨了干态和湿态条件下影响NO_x、SO_2脱除的因素及二者间相互影响关系。结果表明,加压有助于NO转化为NO_2,干态下高浓度SO_2会抑制此过程。湿态下加压会促进NO_x和SO_2转变为硝酸和硫酸,NO_x的脱除率与系统压力和初始NO浓度成正比,SO_2的存在一定程度上会抑制NO_x的脱除,但NO的存在则对SO_2的脱除有益。
Oxy-fuel combustion is a crucial way to realize large scale CO2 capture. Existing research shows that the simultaneous removal of NOx and SO2 can be realized in the CO2 Processing Unit （CPU）. In this paper, an experimental bench which can realize the online measurement of exhaust gas was built-up for testing the removal of NOx and SO2.The factors influencing the removal performance of NO~ and S02 were studied under the dry and wet conditions. The interplay relationship between NOx and S02 was also discussed. Results shows that higher pressure contributed to the oxidation of NO into NO2. However, the presence of SO2 at dry condition hindered the oxidation, and the presence of NO resulted in the concentration of final SO2 lower than the initial value. This study also shows that higher pressure at wet condition contributed to the convertion of NOx and SO2 into HNO3 and H2SO4 respectively. The system pressure and initial NO concentration had a positive influence on the the removal rate of NO. The presence of SO2 inhibited the removal of NOx, whereas the presence of NO contributed to the removal of SO2.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2017年第12期2738-2744,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51566004)
江西省高等学校科技落地计划项目(No.KJLD14093)
关键词
富氧燃烧
烟气压缩
脱硫脱硝
CO2提纯
oxy-fuel combustion
flue gas compression
desulfurization
denitrification
CO2 pu-rification
