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1.159 Aktuelle Fachpublikationen zum Thema temperature

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Effect of fluid velocity on radioactive ion retention by fluidized bed reactor

21.02.2015 | Mohamed Abdelaziz, Azza H. Ali, Hesham F. Elbakhshawangy, Sameh H. Othman, The Canadian Journal of Chemical Engineering, 2015

This study is concerned with the design, construction, simulation, and pre‐operation of a fluidized bed reactor for low level radioactive waste treatment by a new chelating resin. In this respect a new mathematical model is suggested to account for the effect of fluid velocity and to determine ...

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Evaluation of m‐xylene ammoxidation at bench‐scale operation in the presence of V2O5/γ‐Al2O3 catalyst

16.02.2015 | Yukwon Jeon, Sung wook Row, Sang sun Park, Sang Duek Lee, Kyeongseok Oh, Yong‐Gun Shul, The Canadian Journal of Chemical Engineering, 2015

A bench‐scale ammoxidation reaction of m‐xylene was evaluated in the presence of V2O5/γ‐Al2O3 catalyst. The experiment was performed in a packed‐bed reactor with 25 mm i.d. using 200 g of catalyst. To alleviate sudden temperature hikes during ammoxidation, molten salt system was carefully built ...

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Purification, immobilization, and characterization of protease from local Bacillus subtilis M‐11

09.02.2015 | Selmihan Sahin, Ismail Ozmen, Esengul Kir, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract Protease from Bacillus subtilis M‐11 was produced and purified using ammonium sulfate precipitation, gel filtration chromatography with 15.8‐fold. The purified enzyme showed a single band on sodium dodecyl sulfate‐polyacrylamide gel electrophoresis, and it was determined that its ...

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Multiple Regression Analysis of Catalytic Dehydrogenation of Isopropanol in a Chemical Heat Pump System

22.12.2014 | Mehmet Selçuk Mert, İnci Salt, Fatma Karaca, Hatice Hande Mert, Esen Bolat, Chemical Engineering & Technology, 2014

Abstract Chemical heat pump is a clean technology developed to upgrade the low‐level thermal energy to upper levels and to store energy without losses caused by temperature differences. Multiple regression analysis of catalytic dehydrogenation of isopropanol was performed. The endothermic ...

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Catalytic Hydrocracking of a Bitumen‐Derived Asphaltene over NiMo/γ‐Al2O3 at Various Temperatures

18.12.2014 | Yingxian Zhao, Xiao Lin, Da Li, Chemical Engineering & Technology, 2014

Abstract Hydrocracking of a bitumen‐derived asphaltene over NiMo/γ‐Al2O3 was investigated in a microbatch reactor at varying temperatures. The molar kinetics of asphaltene cracking reaction was examined by fitting the experimental data. Below a defined temperature, the molar reaction showed ...

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An Exploratory Study of Explosion Potential of Dust from Torrefied Biomass

17.12.2014 | Andrej Boskovic, Prabir Basu, Paul Amyotte, The Canadian Journal of Chemical Engineering, 2014

Torrefaction makes biomass brittle, and as such it is likely to produce more dusts during handling and transportation. So, it could increase the risk of explosion in plant using torrefied biomass. As the torrefaction technology enters commercial market the safety aspect of torrefied wood ...

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Vulcanization of EPDM rubber compounds with and without blowing agents: Identification of reaction events and TTT‐diagram using DSC data

17.12.2014 | Nora Catalina Restrepo‐Zapata, Tim A. Osswald, Juan Pablo Hernández‐Ortiz, Polymer Engineering and Science, 2014

Vulcanization of industrial‐like ethylene propylene diene termonomer rubber compound is studied using a differential scanning calorimetry (DSC). The analysis starts with DSC information to obtain the total transformation heat, followed by an isothermal‐dynamic temperature ramp that captures ...

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Prediction of azeotropic behaviour by the inversion of functions from the plane to the plane

16.12.2014 | Aline L. Guedes, Francisco D. Moura Neto, Gustavo M. Platt, The Canadian Journal of Chemical Engineering, 2014

Azeotropy is a thermodynamic phenomenon where liquid and vapor coexisting phases have the same composition. In binary mixtures, the azeotropy calculation is represented by a 2 × 2 nonlinear system of algebraic equations with temperature (or pressure) and one molar fraction as unknowns. On rare ...

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Wall slip heating

15.12.2014 | Peter H. Gilbert, A. Jeffrey Giacomin, Polymer Engineering and Science, 2014

When molten plastic is extruded, the upper limiting throughput is often dictated by fine irregular distortions of the extrudate surface. Called sharkskin melt fracture, plastics engineers spike plastics formulations with processing aids to suppress these distortions. Sharkskin melt fracture is ...

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Combustion and Agglomeration Characteristics of the Residue from Corn Stalk‐Based Cellulosic Ethanol

12.12.2014 | Qiangqiang Ren, Shiyuan Li, Dongyu Wang, Shaolin Bao, Qinggang Lu, Chemical Engineering & Technology, 2014

Abstract Lignocellulose is considered an efficient raw material to produce fuel ethanol. Clean utilization of the solid residue derived from lignocellulose‐based fuel ethanol is important for the biomass‐to‐ethanol production chain. Combustion characteristics of the residue originating from ...

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