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Simultaneous removal of SO2 and NOX with ammonia absorbent in a packed column
Yong Jia,Daqian Du,Xinxi Zhang,Xilou Ding,Oin Zhong 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.9
Catalytic oxidation of NO followed by simultaneous removal of SO2 and NOX with ammonia is a promising method for control of coal-fired flue gas pollutants. We investigated simultaneous absorption of SO2 and NOX in a packed column with ammonia, and found that SO2 and NOX could promote absorption with each other in the process of simultaneous removal SO2 and NOX. The removal efficiency of SO2 and NOX was, respectively, about 98% and 70.9% at pH 5.5, temperature 323.15 K, SO2 concentration 1,800×10−6, NOX concentration 400×10−6 and mNO2/mNO 1 in our experimental system. The experimental results also show that the formation of sulfite oxidized by reacting with dissolved NO2and the molar ratio of sulfite to total sulfur is more than 0.8 in the solution. Accordingly, the energy consumption for sulfite oxidation would be greatly reduced in the process of simultaneous desulfurization and denitrification with ammonia.
Fabrication and characterization of a novel foam ceramic material based on coal gasification slags
Hudie Yuan,Hongfeng Yin,Yun Tang,Yalou Xin,Xilou Pu,Hao Zhang 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.6
In this paper, the feasibility of recycling coal gasification slag by high temperature foaming process to fabricate foal ceramicinsulation board has been investigated. Silicon carbide (SiC) was added as the foam agent, and the foaming mechanism wasalso discussed. The results showed that utilization rate of the coal gasification prepared to the foam ceramic new wall materialwas up to 77% and the best dosage of SiC was 3%. Moreover, the relatively optimum parameters were obtained at thesintering temperature of 1,160 ºC for 3h with 77% slags, 20% clay and 3% SiC. Furthermore, compression strength reaches1.18 MPa, the bulk density and heat conductivity coefficient value are 0.21 g/cm3 and 0.05 W/(m·k), respectively.