Measurement and Calculation of the Liquid–Liquid Phase Boundaries and Phase Equilibria for the Hexane+Polyethylene System at High Temperatures

Haruki, Masashi; Fujikawa, Shohei; Adachi, Kai; Hadano, Yuki; Kihara, Sorin; Takishima, Shigeki

doi:10.1252/jcej.15we281

Cited by 6 publications

(3 citation statements)

References 21 publications

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“… a References: Charlet and Delmas; Charlet et al; McHugh and Guckes; Irani and Cozewith; Kennis et al; Chen et al; Chen and Radosz; Kiran and Zhuang; Kiran et al. ; , Gregg et al; − Kiamos and Donohue; Albrecht et al; De Loos et al; Han et al; , Beyer et al; Chen and Radosz; Koak et al; Behme; Oliveira et al; Dariva et al; Tork; Wohlfarth; − Joung et al; Yeo et al; Chen et al; Schnell et al; Krenz; Li et al; Nagy et al; , Haruki et al; − Milanesio et al …”

Section: Data Surveyunclassified

A Semiempirical Method for the Estimation of High-Pressure (Solvent + Polymer) Phase Boundaries in the Solution Polymerization Process

Swanepoel

Schwarz

2020

Ind. Eng. Chem. Res.

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A simple method to predict the liquid–liquid (LL), vapor–liquid (VL), and vapor–liquid–liquid (VLL) boundaries of (solvent + polymer) systems found in the solution process is developed with theoretical justification. The method is developed using the (solvent + LLDPE) data of only two polymers and applied to the (solvent + polymer) data of 276 different systems containing 65 different solvent combinations (up to five solvent constituents) and 69 different nonaromatic hydrocarbon polymers with predominantly linear backbones. For data sets of interest to the solution process, lower critical end point (LCEP) temperatures and pressures can be estimated with average absolute deviations (AADs) of 4 K and 0.2 MPa, respectively. The effects of ethylene and/or comonomer addition and nitrogen addition are accurately predicted (VL/VLL: AAD = 0.2 MPa, n = 1084; LL: AAD = 0.5 MPa, n = 1115). Good results are obtained when extending the results of pure solvents to commercial-grade solvents.

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Section: Data Surveyunclassified

A Semiempirical Method for the Estimation of High-Pressure (Solvent + Polymer) Phase Boundaries in the Solution Polymerization Process

Swanepoel

Schwarz

2020

Ind. Eng. Chem. Res.

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“…3. "Measurement and Calculation of the Liquid-Liquid Phase Boundaries and Phase Equilibria for the Hexane+Polyethylene System at High Temperatures, " by Masashi Haruki, Shohei Fujikawa, Kotaro Adachi, Yuki Hadano, Shin-ichi Kihara, and Shigeki Takishima, Hiroshima University (Haruki et al, 2016) Citation: This article reports measurements of liquid-liquid (LL) phase equilibria for the hexane+polyethylene (PE) at 473 K and various PE weight fractions using a variablevolume optical cell, developed by the authors, which is capable of correcting both the hexane rich phase from the top and PE rich one from the bottom. The PE sample having molecular weights up to 831 kg/mol was grouped into 16 fractions having different molecular weights as 16 pseudo components.…”

Section: "Numerical Simulation Of Molten Slag Depositionmentioning

confidence: 99%

JCEJ Outstanding Paper Award of 2016

Itaya

2017

J. Chem. Eng. Japan / JCEJ

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JCEJ Paper Award is given for outstanding contribution to chemical engineering documented in a paper published in Journal of Chemical Engineering of Japan. The selection is made by means of a three-stage process consisting of nomination, first round elimination, and point rating. Outstanding Paper Awards Subcommittee of the journal has assessed the 140 papers published in 2016, corresponding to volume 49. The subcommittee selected the candidates of the award and the members of the editorial board confirmed the selection. As a result of this process, the editorial board finally determined the following five papers for the award of 2016.1. "Kinetic Analysis of Decomposition of Ammonia over Nickel and Ruthenium Catalysts, " by Atsushi Takahashi and Tadahiro Fujitani, National Institute of Advanced Industrial Science and Technology (AIST) (Takahashi and Fujitani, 2016) Citation: In this paper, the authors investigated the decomposition of NH 3 over Ni and Ru catalysts using a kinetic model based on a reaction mechanism consisting of kinetically important elementary steps. Experimental results obtained over a wide range of reaction conditions were reproduced by the model. The authors newly found that recombinative N 2 desorption was the rate-limiting step on the Ru catalyst, whereas the overall rate of NH 3 decomposition was controlled by the NH 3 dehydrogenation step on the Ni catalyst. These findings are useful to develop high performance catalysts for NH 3 decomposition and synthesis. Therefore, this paper deserves the Outstanding Paper Award. "Numerical Simulation of Molten Slag Deposition in Radiant SyngasCooler with a CFD-Based Model, " by Xianbin Li, Guangsuo Yu, Zhenghua Dai, Zhijie Zhou, and Fuchen Wang, East China University of Science and Technology (Li et al., 2016) Citation: In this paper, the authors developed an axisymmetric 2-dimensional model of radiant syngas cooler, which was based by coupling a computational fluid dynamic (CFD) model and a deposition model of solid, to predict the molten slag deposition behavior in the radiant syngas cooler (RSC) for an entrained flow coal gasification. The obtained simulation results suggested some novel information concerning about molten slag particles and the deposition condition and/or behavior. From the viewpoint of the industrial-scale process, these findings are useful for developing a RSC process. Therefore, this paper deserves the Outstanding Paper Award.3. "Measurement and Calculation of the LiquidLiquid Phase Boundaries and Phase Equilibria for the Hexane+Polyethylene System at High Temperatures, " by Masashi Haruki, Shohei Fujikawa, Kotaro Adachi, Yuki Hadano, Shin-ichi Kihara, and Shigeki Takishima, Hiroshima University (Haruki et al., 2016) Citation: This article reports measurements of liquid-liquid (LL) phase equilibria for the hexane+polyethylene (PE) at 473 K and various PE weight fractions using a variablevolume optical cell, developed by the authors, which is capable of correcting both the hexane rich phase from the top and PE rich o...

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“…Previous studies have presented the LL phase behavior for monodisperse PE systems investigating the effects of PE molecular weight, temperature and ethylene addition on the phase boundary [4][5][6][7][8][9][10][11][12][13]. In our previous work, the LL phase equilibria and phase behavior for polydisperse PE + hexane system were studied [14].…”

Section: Introductionmentioning

confidence: 99%

Phase Behavior and Phase Equilibria for The Polydisperse Polyethylene + Ethylene + Hexane System at High Pressures and Temperature: Experiments and Correlations

Rizqy Romadhona Ginting,

Daichi Nakata,

Kazunori Himemura

et al. 2024

ARFMTS

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This study aims to provide experimental phase equilibrium and phase behavior data for polydisperse PE + ethylene + hexane system. Polydisperse PE (Mw 30.0 kg/mol, PDI 4.2) was used with feed PE weight fraction, ⱳF,PE, of 0.02 to 0.20. The experiments based on a synthetic method were conducted at 473.2 K using an apparatus consisted of an equilibrium cell equipped with sampling tubes for solvent-rich and polymer-rich phases. The LL phase separation pressure increased by about 1 MPa for 1 wt% increase in ethylene concentration. The weight fraction of PE in solvent-rich phase, ⱳS,PE, decreased as the ⱳF,PE and pressure decreased. Similarly, the weight fraction of PE in polymer-rich phase, ⱳP,PE, also decreased as the ⱳF,PE decreased. The solvent-rich phase contained lower molecular weight fractions of PE, while the polymer-rich phase contained higher molecular weight fractions. These results were correlated and predicted with the Sanchez-Lacombe (S-L) EoS. Finally, the effects of pressure and ⱳF,PEon solvent recovery ratio were investigated with the S-L EoS. The results provided in this study could be used to obtain the higher hexane recovery by controlling the LL separation pressure.

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Measurement and Calculation of the Liquid–Liquid Phase Boundaries and Phase Equilibria for the Hexane+Polyethylene System at High Temperatures

Cited by 6 publications

References 21 publications

A Semiempirical Method for the Estimation of High-Pressure (Solvent + Polymer) Phase Boundaries in the Solution Polymerization Process

A Semiempirical Method for the Estimation of High-Pressure (Solvent + Polymer) Phase Boundaries in the Solution Polymerization Process

JCEJ Outstanding Paper Award of 2016

Phase Behavior and Phase Equilibria for The Polydisperse Polyethylene + Ethylene + Hexane System at High Pressures and Temperature: Experiments and Correlations

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