02035nas a2200181 4500008004100000022001400041245016400055210006900219260000800288300001400296490000700310520131500317100003001632700002301662700002101685700002301706856012401729 2019 eng d a0021-956800aExperimental investigation of isothermal vapor-liquid equilibrium and estimation of excess thermodynamic properties (h(E)) of CHO2K-H2O from 278.15 to 423.15 K0 aExperimental investigation of isothermal vaporliquid equilibrium cAPR a1488-15000 v643 a

In this paper, vapor liquid equilibrium (VLE) of a binary mixture, potassium formate-water (CHO2K-H2O), was measured experimentally using a dynamic moving type VLE setup in the temperature range of 313.15 to 393.15 K. Overall, large vapor pressure data points generated for the mole fraction of CHO2K from 0.023 to 0.461 and the solution temperature up to 423.15 K were used to correlate the local composition-based activity coefficient model (NRTL model). The data obtained via the thermodynamic model fitting shows good agreement with the experimental VLE data with overall average relative deviation of 2.15% and root-mean-square deviation of 0.25%. The obtained results further indicate that the binary mixture exhibits a negative deviation from the Raoult's law, which is an important characteristic of the working fluid used for a heat-activated vapor absorption system (VAS). Therefore, the CHO2K-H2O mixture can be considered as an alternative working pair that will overcome the limitations allied to the crystallization and corrosion of the commercial working fluids mainly lithium bromide-water (LiBr-H2O). The fitted nonrandom two-liquid model was further utilized to determine the excess thermodynamic properties, solution enthalpy, solution entropy, and equilibrium P-T-x (Duhring) plot.

1 aTakalkar, Gorakshnath, D.1 aBhosale, Rahul, R.1 aMali, Nilesh, A.1 aBhagwat, Sunil, S. uhttps://library.ncl.res.in/content/experimental-investigation-isothermal-vapor-liquid-equilibrium-and-estimation-excess01801nas a2200253 4500008004100000022001400041245011600055210006900171260000800240300001200248490000700260520093900267653000801206653003701214653001701251653001101268653002101279653001701300100003601317700002301353700002101376700002301397856012701420 2020 eng d a1742-829700aEnergetic and exergetic performance of NH3-H2O-based absorption refrigeration cycle: effect of operating factor0 aEnergetic and exergetic performance of NH3H2Obased absorption re cJAN a352-3690 v313 a

One of the major objectives while designing the vapour absorption refrigeration system (VARS) is to acquire better performance within the accessible heat source and sink temperature limit. In this paper, attempts are made to identify the temperature limit for the optimisation of a single stage ammonia refrigeration system (AAR) by performing a thermodynamic analysis. To estimate the potential of utilisation of low-grade heat energy, operating factor (R) is considered towards optimising the energetic (COP) and exergetic COP (ECOP). The simulated COP and ECOP results are expended to predict the feasibility and optimum operating region for an AAR cycle in terms of theRand various operating temperatures such asT(gen),T-abs,T-cond,T-e. The operating factorRcovers a wide range of applications i.e., from deep-freezing (253.15 K) to air conditioning (283.15 K) and from water-cooling (303.15 K) to air cooling (318.15 K).

10aAAR10aammonia absorption refrigeration10acold storage10aexergy10aoperating factor10asolar energy1 aTakalkar, Gorakshnath, Dadabhau1 aBhosale, Rahul, R.1 aMali, Nilesh, A.1 aBhagwat, Sunil, S. uhttps://library.ncl.res.in/content/energetic-and-exergetic-performance-nh3-h2o-based-absorption-refrigeration-cycle-effect01844nas a2200241 4500008004100000022001400041245017000055210006900225260000800294300001100302490000800313520098400321653002201305653001801327653001301345653002201358653001901380653000801399100002101407700002101428700002101449856013201470 2020 eng d a0021-961400aExperimental analysis of vapour-liquid phase equilibria for binary systems of diethyl carbonate with methyl, ethyl, isopropyl, n-butyl and isoamyl acetates at 95 kPa0 aExperimental analysis of vapourliquid phase equilibria for binar cNOV a1061890 v1503 a

Experimental analysis of vapour-liquid phase equilibrium (VLE) for five binary pairs of diethyl carbonate (DEC) with methyl acetate, ethyl acetate, isopropyl acetate, n-butyl acetate and isoamyl acetate was carried out in this study. VLE data were generated experimentally at local atmospheric pressure of 95 kPa in a glass dynamic recirculation still. Reliability of data was checked with the thermodynamic consistency tests by Van Ness, infinite dilution, pure component and mean absolute deviation test. Experimental data was found to be thermodynamically consistent with all tests and data was regressed with Wilson, NRTL and UNIQUAC activity coefficient models to determine binary interaction parameters. Binary pair of DEC with n-butyl acetate has shown azeotropic behaviour with minimum boiling azeotrope and a close boiling behaviour through-out the composition range. No azeotropic behaviour was observed for the rest of the binary pairs. (c) 2020 Elsevier Ltd.

10aDiethyl carbonate10aethyl acetate10aIsobaric10aIsopropyl acetate10amethyl acetate10aVLE1 aBhoi, Bharat, R.1 aMali, Nilesh, A.1 aJoshi, Sunil, S. uhttps://library.ncl.res.in/content/experimental-analysis-vapour-liquid-phase-equilibria-binary-systems-diethyl-carbonate-methyl01373nas a2200169 4500008004100000022001400041245012300055210006900178260000800247300001400255490000700269520073000276100002501006700002101031700002101052856013001073 2020 eng d a0021-956800aExperimental vapor-liquid phase equilibrium analysis of the binary systems of aniline with xylene isomers at 93.13 kPa0 aExperimental vaporliquid phase equilibrium analysis of the binar cMAY a2619-26240 v653 a

In the present work, vapor-liquid phase equilibrium (VLE) analyses of binary systems of aniline with four isomers of xylene, comprising p-xylene, m-xylene, o-xylene, and ethylbenzene, are reported at 93.13 kPa. The experimental VLE data was generated in a dynamic circulating vapor-liquid, and the data was found thermodynamically consistent using the Van Ness point-to-point consistency test. The experimental VLE data was regressed with the Wilson, NRTL, and UNIQUAC activity coefficient models to obtain the binary interaction parameters. No azeotropic or close-boiling behavior was observed in any of the binary pair, and these pairs were found suitable for separation through a conventional distillation method.

1 aYadav, Satyajeet, S.1 aMali, Nilesh, A.1 aJoshi, Sunil, S. uhttps://library.ncl.res.in/content/experimental-vapor-liquid-phase-equilibrium-analysis-binary-systems-aniline-xylene-isomers01766nas 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

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.

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-solvent02103nas a2200241 4500008004100000022001400041245013500055210006900190260000900259300001100268490000800279520129300287653001401580653001001594653001201604653001001616653002901626653001001655100002201665700002101687700002101708856013201729 2021 eng d a0378-381200aEffect of CaCl2 and ZnCl2 salts on isobaric vapor-liquid equilibrium in separation of the azeotropic mixture of ethanol plus water0 aEffect of CaCl2 and ZnCl2 salts on isobaric vaporliquid equilibr cJUN  a1130000 v5373 a

Present work analyzes potential of calcium chloride (CaCl2) and zinc chloride (ZaCl(2)) salts as entrainer for breaking the minimum boiling azeotrope of ethanol and water. Isobaric vapor-liquid equilibrium (VLE) data for the binary systems of water + ethanol and ternary system of water + ethanol + calcium chloride, and water + ethanol + zinc chloride were measured at a constant pressure of 94.5 kPa. The effect of salts on the relative volatility of ethanol to water as well as on the vapor phase mole fractions of ethanol were also studied experimentally. From the experimental results, it is observed that with addition of salts, the azeotropic point of the ethanol and water system can be eliminated. Salting out effects in case of calcium chloride was more than that zinc chloride salt. The results obtained in this work showed that calcium chloride could be a better choice for separation of the water + ethanol azeotrope. Electrolyte nonrandom two-liquid (eNRTL) model was used to correlate the experimental VLE data. The model prediction with the regressed parameters was found in well agreement with the experimental data. The experimental data obtained in this work was found thermodynamically consistent using van Ness test. (C) 2021 Elsevier B.V. All rights reserved.

10aAzeotrope10aeNRTL10aEthanol10asalts10aVapor-liquid equilibrium10aWater1 aGhuge, Pravin, D.1 aMali, Nilesh, A.1 aJoshi, Sunil, S. uhttps://library.ncl.res.in/content/effect-cacl2-and-zncl2-salts-isobaric-vapor-liquid-equilibrium-separation-azeotropic-mixture