01766nas a2200169   4500008004100000022001400041245010300055210006900158260000900227300001400236490000700250520114600257100002201403700002101425700002101446856012901467       2020                        eng d  a0888-588500aExtractive distillation configuration for nitric acid dehydration using sulfuric acid as a solvent0 aExtractive distillation configuration for nitric acid dehydratio  cAPR   a6183-61930 v593 a<p>In this work, an extractive distillation configuration for dehydration of nitric acid is proposed with sulfuric acid as a solvent. Thermodynamic modeling of the vapor-liquid equilibrium of binary and ternary systems of nitric acid/water/sulfuric acid is carried out using the electrolyte non-random two-liquid (eNRTL-RK) thermodynamic property method in the Aspen plus process simulator. The model performance is validated by comparing the experimental data with the estimated data by the eNRTL-RK model and is found to be in good agreement. The thermodynamic model is then used for developing a triple-column extractive distillation sequence, comprising a preconcentration column, an extractive distillation column, and a solvent recovery column. The configuration is designed, simulated, and optimized to concentrate dilute nitric acid using sulfuric acid as a solvent to break the nitric acid-water azeotrope. The operating and structural parameters of the distillation configuration are optimized simultaneously with an objective of minimizing the energy consumption and the total annual cost (TAC) of the overall configuration.</p>
1 aGhuge, Pravin, D.1 aMali, Nilesh, A.1 aJoshi, Sunil, S.  uhttps://library.ncl.res.in/content/extractive-distillation-configuration-nitric-acid-dehydration-using-sulfuric-acid-solvent