TY - JOUR
T1 - Experimental study and modelling of mass transfer during simultaneous absorption of SO2 and NO2 with chemical reaction
AU - Susianto,
AU - Pétrissans, Mathieu
AU - Pétrissans, Anélie
AU - Zoulalian, André
PY - 2005/10
Y1 - 2005/10
N2 - The aim of this paper is to model the simultaneous absorption mass transfer of NO2 and SO2 with chemical reactions. The absorption has been studied at low temperature (25 °C) in a gas-liquid stirred tank reactor, open for the gas flow and closed for the liquid phase. The kinetics of the reactions between sulphite and nitrite ions, obtained respectively from the absorption of SO2 and NO2, depend mainly on the pH of the solution. With a weakly acid solution (4 < pH < 5), at low temperature, after the simultaneous absorption and interaction between the ions generated, it is possible to transform NO2 and SO2 into two products: N2O and hydroxylamine disulfonic acid (HADS). In the first time, the mass transfer during the absorption of the two gases, without chemical reaction was characterized separately. Then the mass transfer during the simultaneous absorption with chemical reaction was quantified. The experimental conditions have been fixed at pH 4 and 5 for different gas flow rates. The mass transfer for NO2 was clearly improved by the interaction between nitrite and sulphite ions. The modelling of mass transfer in the liquid phase of the reactor allowed to specify the hydration kinetics of nitrogen dioxide.
AB - The aim of this paper is to model the simultaneous absorption mass transfer of NO2 and SO2 with chemical reactions. The absorption has been studied at low temperature (25 °C) in a gas-liquid stirred tank reactor, open for the gas flow and closed for the liquid phase. The kinetics of the reactions between sulphite and nitrite ions, obtained respectively from the absorption of SO2 and NO2, depend mainly on the pH of the solution. With a weakly acid solution (4 < pH < 5), at low temperature, after the simultaneous absorption and interaction between the ions generated, it is possible to transform NO2 and SO2 into two products: N2O and hydroxylamine disulfonic acid (HADS). In the first time, the mass transfer during the absorption of the two gases, without chemical reaction was characterized separately. Then the mass transfer during the simultaneous absorption with chemical reaction was quantified. The experimental conditions have been fixed at pH 4 and 5 for different gas flow rates. The mass transfer for NO2 was clearly improved by the interaction between nitrite and sulphite ions. The modelling of mass transfer in the liquid phase of the reactor allowed to specify the hydration kinetics of nitrogen dioxide.
KW - Mass transfer
KW - Modelling
KW - NO
KW - SO
KW - Simultaneous absorption
UR - http://www.scopus.com/inward/record.url?scp=20344376938&partnerID=8YFLogxK
U2 - 10.1016/j.cep.2005.03.001
DO - 10.1016/j.cep.2005.03.001
M3 - Article
AN - SCOPUS:20344376938
SN - 0255-2701
VL - 44
SP - 1075
EP - 1081
JO - Chemical Engineering and Processing: Process Intensification
JF - Chemical Engineering and Processing: Process Intensification
IS - 10
ER -