TY - JOUR
T1 - Study of nitrogen oxide absorption in the calcium sulfite slurry
AU - Sun, Ye
AU - Meng, Yuan
AU - Guo, Xiaoyan
AU - Zhu, Tianle
AU - Liu, Hongju
AU - Li, Wenpei
N1 - Publisher Copyright:
© 2016, Springer Japan.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - Experiments were conducted using a bubbling reactor to investigate nitrogen oxide absorption in the calcium sulfite slurry. The effects of CaSO3 concentration, NO2/NO mole ratio and O2 concentrations on NO2 and SO2 absorption efficiencies were investigated. Five types of additives, including MgSO4, Na2SO4, FeSO4, MgSO4/Na2SO4 and FeSO4/Na2SO4, had been evaluated for enhancing NO2 absorption in CaSO3 slurry. Results showed that CaSO3 concentration had significant impact on NO2 and SO2 absorption efficiencies, and the highest absorption efficiencies of SO2 and NO2 could reach about 99.5 and 75.0 %, respectively. Furthermore, the NO2 absorption was closely related to the NO2/NO mole ratio, and the existence of NO2 in flue gas may promote NO absorption. The presence of O2 in simulated flue gas was disadvantage for NOx removal because it can oxidize sulfite to sulfate. It was worth pointing out that FeSO4/Na2SO4 was the best additive among those investigated additives, as the NO2 removal efficiency was significantly increased from 74.8 to 95.0 %. IC and in situ FTIR results suggest that the main products were NO3 − and NO2 − in liquid phase and N2O, N2O5 and HNO3 in gas phase during the CaSO3 absorption process.
AB - Experiments were conducted using a bubbling reactor to investigate nitrogen oxide absorption in the calcium sulfite slurry. The effects of CaSO3 concentration, NO2/NO mole ratio and O2 concentrations on NO2 and SO2 absorption efficiencies were investigated. Five types of additives, including MgSO4, Na2SO4, FeSO4, MgSO4/Na2SO4 and FeSO4/Na2SO4, had been evaluated for enhancing NO2 absorption in CaSO3 slurry. Results showed that CaSO3 concentration had significant impact on NO2 and SO2 absorption efficiencies, and the highest absorption efficiencies of SO2 and NO2 could reach about 99.5 and 75.0 %, respectively. Furthermore, the NO2 absorption was closely related to the NO2/NO mole ratio, and the existence of NO2 in flue gas may promote NO absorption. The presence of O2 in simulated flue gas was disadvantage for NOx removal because it can oxidize sulfite to sulfate. It was worth pointing out that FeSO4/Na2SO4 was the best additive among those investigated additives, as the NO2 removal efficiency was significantly increased from 74.8 to 95.0 %. IC and in situ FTIR results suggest that the main products were NO3 − and NO2 − in liquid phase and N2O, N2O5 and HNO3 in gas phase during the CaSO3 absorption process.
KW - Absorption
KW - Additives
KW - CaSO slurry
KW - Nitrogen oxides
KW - Products
UR - https://www.scopus.com/pages/publications/84978154118
U2 - 10.1007/s10163-016-0526-8
DO - 10.1007/s10163-016-0526-8
M3 - 文章
AN - SCOPUS:84978154118
SN - 1438-4957
VL - 18
SP - 618
EP - 624
JO - Journal of Material Cycles and Waste Management
JF - Journal of Material Cycles and Waste Management
IS - 4
ER -