TY - JOUR
T1 - Thermodynamic modeling of the hybrid sulfur (HyS) cycle for hydrogen production
AU - Kaur, Harnoor
AU - Wang, Meng
AU - Gorensek, Maximilian B.
AU - Chen, Chau Chyun
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/3/25
Y1 - 2018/3/25
N2 - We have developed a comprehensive thermodynamic model for the ternary system sulfur dioxide + sulfuric acid + water based on a previously published thermodynamic model of the aqueous sulfuric acid system using the symmetric electrolyte NRTL (eNRTL) activity coefficient model. The eNRTL binary interaction parameters and the chemical equilibrium constants are regressed from experimental SO2 solubility data in aqueous sulfuric acid solutions. The model accurately represents all thermodynamic properties including vapor-liquid equilibrium, liquid-liquid equilibrium, calorimetric properties, and speciation over a wide acid concentration range, from pure water to pure sulfuric acid and pure sulfur dioxide, and temperatures from 273.15 to 393.15 K. The model should be very useful in supporting process research, development, and design of advanced water-splitting processes based on the hybrid sulfur (HyS) cycle.
AB - We have developed a comprehensive thermodynamic model for the ternary system sulfur dioxide + sulfuric acid + water based on a previously published thermodynamic model of the aqueous sulfuric acid system using the symmetric electrolyte NRTL (eNRTL) activity coefficient model. The eNRTL binary interaction parameters and the chemical equilibrium constants are regressed from experimental SO2 solubility data in aqueous sulfuric acid solutions. The model accurately represents all thermodynamic properties including vapor-liquid equilibrium, liquid-liquid equilibrium, calorimetric properties, and speciation over a wide acid concentration range, from pure water to pure sulfuric acid and pure sulfur dioxide, and temperatures from 273.15 to 393.15 K. The model should be very useful in supporting process research, development, and design of advanced water-splitting processes based on the hybrid sulfur (HyS) cycle.
KW - Electrolyte NRTL model
KW - Hybrid sulfur cycle
KW - Sulfur dioxide
KW - Sulfuric acid
KW - Water-splitting
UR - http://www.scopus.com/inward/record.url?scp=85040322374&partnerID=8YFLogxK
U2 - 10.1016/j.fluid.2017.12.025
DO - 10.1016/j.fluid.2017.12.025
M3 - Article
AN - SCOPUS:85040322374
SN - 0378-3812
VL - 460
SP - 175
EP - 188
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
ER -