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- 저자 : Pradnya Prabhakar Ghoderao (검색결과 3 건)
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Pradnya Nirmala Prabhakar Ghoderao,Mohan Narayan,Vishwanath Haily Dalvi,변헌수 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.12
The Peng-Robinson (PR) EOS is a very successful two-parameter equation of state to estimate thermodynamicproperties of pure compounds as well as mixtures. The PR EOS has been modified and revised several ways toimprove estimates, and the most popular modification is for the attractive term through alpha function and temperaturedependent covolume parameter in the repulsive term. However, the unphysical, i.e., negative values of temperaturedependent co volume parameter at high temperature lead to undesirable results. We have addressed this issue inthe present work by incorporating a temperature dependent covolume parameter and yet physically consistent over alarge range of temperature. In the present work, the Modified-Peng-Robinson 2 (MPR2) equation of state is presentedby modifying the alpha function in attractive term and temperature dependent co-volume parameter in repulsive termof the PR EOS. The accuracy of MPR2 EOS is demonstrated by comparing results with the PR, HKM1, and MPR1equations of state. The thermodynamic properties, namely saturated vapor pressure and liquid density, enthalpy ofvaporization, compressed liquid densities in sub and supercritical region, heat capacities (isobaric and isochoric), andsound velocity of pure compounds, are predicted by MPR2 EOS which agrees very well with the experimental data. We have further studied 24 refrigerant properties like vapor and liquid densities. The work has also been extended tostudy the phase behavior of 26 binary mixtures using van der Waals single fluid mixing rules.
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A review on graphene oxide effect in energy storage devices
DURAISAMI DHAMODHAR-AN,Pradnya Prabhakar Ghoderao,Veeman Dhinakaran,Suhail Mubarak,Nidhin Divakaran,Hun-Soo Byun 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
This article contributes a broad analysis of the latest improvement on energy storage operations usingsingle layer surface modified graphene oxide (GO). GO, a thin structure of graphite oxide, is a modifiedgraphene, holding several oxygen-casing functional groups. This provides GO with numerous distinctivefeatures for multipurpose applications in capacitors, fuel cells and batteries. Precise applications are distinguishedprimarily comprising use in electrodes as the dynamic substantial’s to augment the recital oras substrates to discriminate the configurations, in solid-state solution and membranes techniques toadvance the ionic attraction and other behaviors, and in internal structure layers to guard the currentcollectors, membranes or electrodes. Additionally, the problems, difficulties and looming overlooks areconferred in the article for promising promotes research development of GO applications.
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DURAISAMI DHAMODHAR-AN,Veeman Dhinakaran,Radhika Nagavaram,Pradnya Prabhakar Ghoderao,Hun-Soo Byun,Lixin Wu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.107 No.-
Waterborne epoxy (WEP) resins are of great significance as multifunctional properties recently. Nevertheless, their curing process, which involves the formation of numerous micro-pores via waterevaporation, has limited applications in the industrial utilizations. In this work, we have synthesizedand enhanced the water-dispersible Zirconium phosphate decorated graphene oxide (ZrP@GO) nanocompositesthrough a one-step preparation method of graphene oxide (GO) sheets decorated with ZrPnanoparticles, and the as-prepared ZrP@GO nanocomposites were introduced as nanofillers for WEP systemin order to enhance its multifunctional properties. The as-prepared GO, ZrP, and ZrP@GO hybridswere scrutinized by XRD, XPS, Raman, TGA, and its morphology study were investigated with the assistanceof AFM, TEM, and FESEM. The anticorrosive properties were analyzed using natural salt spray tests(NSS). The ZrP@GO mixed WEP coatings exhibit better protection towards corrosion when compared toWEP/GO and WEP/ZrP coatings. Also, the excellent mechanical and thermal properties were achievedwith the incorporation of ZrP@GO hybrids with the WEP system. The better performance of ZrP@GOwas achieved through enhanced dispersion, exfoliation, and the outstanding shielding effect of the smecticaligned layers of ZrP@GO hybrids. Besides, a finite element model proposed through this research topredict the tensile behaviors are good in agreement with the measured vales.
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