Simulation on thermodynamic state of ammonia carbonation at low temperature and low pressure
Simulation on thermodynamic state of ammonia carbonation at low temperature and low pressure
Jingcai ZHAO, Xingfu SONG(), Ze SUN, Jianguo YU
National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai 200237, China
This study on thermodynamic property of NH3-CO2-H2O system provided the basic data for ammonia carbonation. Simulations on vapor-liquid equilibrium (VLE) of ammonia carbonation with different physical properties were discussed in NH3-H2O and NH3-CO2-H2O systems, respectively. The results indicated that at low temperature (303.15 K–363.15 K) and pressure (0.1–0.4 MPa), the PR (Peng-Robinson) equation was suitable for the description of the thermodynamic state in NH3-H2O system. NRTL (Non-Random-Two-Liquid) series models were selected for NH3-CO2-H2O mixed electrolyte solution system. VLE data regression results showed that NRTL series models were suitable for describing thermodynamic properties of NH3-CO2-H2O system, because average relative error fitting with each model was about 1%. As an asymmetric electrolytes model in NRTL model, E–NRTLRK (Electrolyte NRTL Redlich Kwong) could most accurately fit VLE data of NH3-CO2-H2O system, with fitting error less than 1%. In the extent temperature range of 273.15 K–363.15 K, the prediction of product component using E-NRTLRK model for ammonia carbonation agreed well with the data reported in literature.
Corresponding Author(s):
SONG Xingfu,Email:xfsong@ecust.edu.cn
引用本文:
. Simulation on thermodynamic state of ammonia carbonation at low temperature and low pressure[J]. Frontiers of Chemical Science and Engineering, 2013, 7(4): 447-455.
Jingcai ZHAO, Xingfu SONG, Ze SUN, Jianguo YU. Simulation on thermodynamic state of ammonia carbonation at low temperature and low pressure. Front Chem Sci Eng, 2013, 7(4): 447-455.
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