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1.172 Aktuelle Fachpublikationen zum Thema temperature

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Adsorption behavior of herbicide paraquat from aqueous solutions using starfish particles: kinetic, isotherm, and thermodynamic studies

27.03.2015 | Han Hao, Jianguo Feng, Weitao Chen, Sheng Xiang, Wenjun Liu, Xuemin Wu, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract The adsorption of paraquat (PQ) on starfish particles was investigated to calculate the kinetic, isotherm, and thermodynamic parameters. The experiments were carried out as a function of particle size of adsorbent, adsorbent dosage, contact time, initial PQ concentration, stirring ...

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Detection of decomposition for high pressure ethylene/vinyl acetate copolymerization in autoclave reactor using principal component analysis on heat balance model

16.03.2015 | G Sivalingam, Nipun J. Soni, Suketu M. Vakil, The Canadian Journal of Chemical Engineering, 2015

Abstract The autoclave reactor offers flexibility in producing specialty grades of ethylene/vinyl acetate copolymer at temperature range of 150‐230 °C and pressure range of 1400‐2000 kg/cm2. At such conditions, copolymerization is accompanied by decomposition of reactants which increases the ...

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Effect of N2 pretreatment on the basicity, structural change, and isomerization activity of MgO and MgO/Mg(OH)2 catalysts

16.03.2015 | Prinyanee Suttibut, Kongkiat Suriye, Sirachaya Kunjara Na Ayudhya, Piyasan Praserthdam, Joongjai Panpranot, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract As revealed by the X‐ray diffraction, basicity titration, and Fourier transform infrared spectroscopy results, changes in the structural properties, basicity, and isomerization activities were observed on the MgO catalysts upon N2 pretreatment at 325 °C followed by isomerization ...

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Viscosity model for choline chloride‐based deep eutectic solvents

16.03.2015 | Farouq S. Mjalli, Jamil Naser, Asia-Pacific Journal of Chemical Engineering, 2015

ABSTRACT In this work, a viscosity model for choline chloride‐based deep eutectic solvents (DESs) was developed. In addition to temperature, the new model presented here considers the composition of the salt in the DES, which was not the case for all previously reported viscosity models. Two ...

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Effects of thermal radiation and chemical reactions on peristaltic flow of a Newtonian nanofluid under inclined magnetic field in a generalized vertical channel using homotopy perturbation method

13.03.2015 | M. Kothandapani, J. Prakash, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract In this paper, we study the influences of inclined magnetic field, heat source, thermal radiation, and chemical reactions on peristaltic flow of a Newtonian nanofluid in a vertical generalized (tapered asymmetric) channel. The flow is engendered because of an asymmetric sinusoidal ...

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Simulation of set‐point feed‐forward control of wellhead valves in an organic Rankine cycle geothermal power plant

11.03.2015 | Matthew J. Proctor, Wei Yu, Brent R. Young, Asia-Pacific Journal of Chemical Engineering, 2015

ABSTRACT Organic Rankine cycles (ORCs) are an energy conversion technology particularly suitable for low enthalpy heat resources. In this paper, the application of a different kind of feed‐forward scheme called set‐point feed‐forward control to an organic Rankine cycle geothermal power plant ...

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Numerical evaluation and improvement efficiency of radial flow moving‐bed reactors for catalytic pyrolysis of light hydrocarbons to low carbon olefins

04.03.2015 | Fang‐Zhi Xiao, Houyang Chen, Zheng‐Hong Luo, The Canadian Journal of Chemical Engineering, 2015

Abstract A three‐dimensional (3D) reactor model based on the Eulerian‐Eulerian approach was applied to describe the gas‐solid flow and heat transfer performance in a radial flow moving bed reactor (RFMBR). A six‐lumped kinetic model for the catalytic pyrolysis of C4 hydrocarbon was employed. ...

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LTA/Poly(1‐trimethylsilyl‐1‐propyne) Mixed‐Matrix Membranes for High‐Temperature CO2/N2 Separation

04.03.2015 | Ana Fernández‐Barquín, Clara Casado‐Coterillo, Miguel Palomino, Susana Valencia, Angel Irabien, Chemical Engineering & Technology, 2015

Abstract Mixed‐matrix membranes (MMM) consisting of poly(1‐trimethylsilyl‐1‐propyne) (PTMSP) as continuous matrix and small‐pore LTA‐framework zeolites with Si/Al ratios from 1 (commercial zeolite A) to ∞ (ITQ‐29) as dispersed phase were prepared by solution casting. The thermal stability of ...

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Computational fluid dynamics simulation and parametric study of coal gasification in a circulating fluidized bed reactor

03.03.2015 | Yawen Zhang, Fulin Lei, Yunhan Xiao, Asia-Pacific Journal of Chemical Engineering, 2015

ABSTRACT A computational fluid dynamics model based on the Eulerian–Eulerian multiphase framework was implemented to simulate the coal gasification processes in a circulating fluidized bed gasifier. The standard k–ε turbulence model is used for gas phase, and the solid phases are modeled with ...

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The effect of expanded graphite on the thermal stability, latent heat, and flammability properties of EVA/wax phase change blends

26.02.2015 | M.J. Mochane, A.S. Luyt, Polymer Engineering and Science, 2015

This article reports on the morphology, melting and crystallization behavior, thermal stability, flammability and thermal conductivity of shape‐stabilized phase‐change materials (PCM) for thermal energy storage, based on a soft Fischer–Tropsch paraffin wax, the PCM, blended with ethylene vinyl ...

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