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1.245 Aktuelle Fachpublikationen zum Thema temperature

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Kinetics of tocopherol degradation during the storage of wheat germ oil

20.08.2015 | Micaela Magariño, Carmen M. Mateo, Susana M. Nolasco, The Canadian Journal of Chemical Engineering, 2015

Abstract Tocopherol degradation in wheat germ oil was studied during storage at different temperatures. Two types of wheat germ were used: heat‐treated germ (HT) and raw germ (RG). The oil was extracted (Soxhlet, n‐hexane) and stored at 25 and 47 °C (82 days) and at ‐20 and 5 °C (600 days). ...

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Numerical simulation of gas‐solid heat transfer behaviour in rectangular spouted bed

18.08.2015 | Chunhua Wang, Zhaoping Zhong, Xiaoyi Wang, Siti Aisyah Alting, The Canadian Journal of Chemical Engineering, 2015

Abstract In order to investigate heat transfer behaviour at an individual particle scale, the particle cooling process in a rectangular spouted bed is simulated by the Computational Fluid Dynamics‐Discrete Element Method (CFD‐DEM). As the inlet gas velocity increases, the gas‐particle ...

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The parameter domain of convective instability of the adiabatic packed‐bed reactor

18.08.2015 | Vladimir Yakhnin, Sorathep Rattanayotsakun, Attasak Jaree, Michael Menzinger, The Canadian Journal of Chemical Engineering, 2015

Packed‐bed reactors (PBR) can exhibit two types of convective instability: dynamic or differential‐flow instability (DIFI), and static instability, commonly referred to as parametric sensitivity (PS). DIFI and PS both amplify external perturbations and may result in reactor temperature ...

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Adsorption behaviours of sulfonated humic acid at fly ash‐water interface: Investigation of equilibrium and kinetic characteristics

18.08.2015 | Siqi Yang, Guohe Huang, Chunjiang An, Huiqin Li, Yarong Shi, The Canadian Journal of Chemical Engineering, 2015

Sulfonated humic acid (SHA) has been widely used in oilfield production and it can significantly contribute to COD, BOD, sulfurated pollutants, and other toxic substances when discharged into the environment. There is an urgent need for effective and safe remediation of such toxic compounds ...

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Study on phenolphthalein poly(ether sulfone)‐modified cyanate ester resin and epoxy resin blends

12.08.2015 | Guan Wang, Rongguo Wang, Gang Fu, Tangling Gao, Chunming Fu, Hong Kuang, Fan Yang, Weicheng Jiao, Lifeng Hao, Wenbo Liu, Polymer Engineering and Science, 2015

In this work, the phenolphthalein poly(ether sulfone) (PES‐C)‐modified cyanate ester (CE) and epoxy (EP) blends were prepared. This work mainly discusses the curing behaviors, fracture toughness, dynamic mechanical properties, and thermal and mechanical properties of the blends. The Fourier ...

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Synthesis and characterization of hydrochars produced by hydrothermal carbonization of oil palm shell

12.08.2015 | Sabzoi Nizamuddin, Natesan Subramanian Jaya Kumar, Jaya Narayan Sahu, Poobalan Ganesan, Nabisab Mujawar Mubarak, Sha ..., The Canadian Journal of Chemical Engineering, 2015

In this paper, hydrothermal carbonization (HTC) is applied to oil palm shells to produce a solid fuel known as hydrochar. The effect of reaction temperatures 220–290 °C at reaction time 30 min, and a biomass to water ratio of 0.15 g/g (15 wt.%) was investigated for synthesis of hydrochar. The ...

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Bifurcation analysis and multiplicity of steady states in a multistage agitated contactor for gas‐liquid processes

07.08.2015 | Lifeng Zhang, Qinmin Pan, Garry L. Rempel, The Canadian Journal of Chemical Engineering, 2015

Abstract In this work, a bifurcation analysis of steady states in a multistage agitated contactor (MAC) was conducted for typical gas‐liquid processes. A cascade of stirred tank reactors with a backflow was used to model the reactive flow in the MAC, and second order reaction kinetics was ...

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Thermodynamic and kinetic study of the production of oxygenated compounds: Synthesis of 1,1‐diethoxybutane catalyzed by amberlyst‐15

07.08.2015 | Mehabub Rahaman, Nuno S. Graça, Carla S. M. Pereira, Alírio E. Rodrigues, The Canadian Journal of Chemical Engineering, 2015

Abstract The aim of the present work is a thermodynamic and kinetic study of the acetalization reaction between butyraldehyde and ethanol to produce the acetal 1,1‐diethoxybutane (DEB). The reaction was catalyzed by the commercial ion‐exchange resin Amberlyst‐15. Through a study of the ...

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Numerical modeling of internal heating curing of glass reinforced epoxy pipes

07.08.2015 | Hugo Alejandro Flores, Laura Alejandra Fasce, Carmen Cristina Riccardi, María Alejandra Ayude, Polymer Engineering and Science, 2015

A dynamic one‐dimensional model is developed to simulate the novel internal heating curing process in the manufacturing of glass reinforced epoxy pipes by filament winding. The model combines the energy balance with a mechanistic kinetic approach and it is experimentally validated using ...

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Molecular dynamics study of CH4–CO2 mixed hydrate dissociation

07.08.2015 | Lizhi Yi, Deqing Liang, Shuai Liang, Xuebing Zhou, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract Molecular dynamics simulations are performed to study the dissociation process of CH4–CO2 mixed hydrate with different gas composition at P = 5 MPa and T = 275 K, 280 K, and 285 K. Our simulation results show that the concentration of CO2 in 51262 cages greatly influences the ...

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