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Enthalpy of dilution of [SO2+salt+H2O] in [salt+H2O] {salt=(NH4)2SO4 or Na2SO4}: Experimental results and modeling

2005; Elsevier BV; Volume: 429; Issue: 2 Linguagem: Inglês

10.1016/j.tca.2005.03.005

1872-762X

Álvaro Pérez‐Salado Kamps, Viktor Ermatchkov, Eckehard Meyer, Gerd Maurer,

Industrial Gas Emission Control

Abstract New experimental results are presented for the enthalpy change upon diluting aqueous solutions of sulfur dioxide containing a salt (either ammonium sulfate or sodium sulfate) in aqueous solutions of that salt at about 313 and 352 K. A previously developed thermodynamic model for the vapor–liquid equilibrium of the chemical reacting systems {SO 2 + (NH 4 ) 2 SO 4 + H 2 O} and (SO 2 + Na 2 SO 4 + H 2 O) is extended allowing for the formation of pyrosulfite and for the description of the new experimental results for the enthalpy change upon dilution.