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1.156 Aktuelle Fachpublikationen zum Thema temperature

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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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CO2 Capture Using Monoethanolamine in a Bubble‐Column Scrubber

12.12.2014 | Pao‐Chi Chen, Yi Xin Luo, Pao Wein Cai, Chemical Engineering & Technology, 2014

Abstract A continuous bubble‐column scrubber, capturing CO2 gas by monoethanolamine (MEA) solution in a pH‐stat operation, is used to search for optimum process parameters by means of the Taguchi method. The process variables are the pH of the solution, gas flow rate, concentration of CO2 gas, ...

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Time‐dependent exhaust steam temperature profile to mitigate fouling

11.12.2014 | Divya Srivastava, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT In sugar industries, a decrease in the exit liquor concentration is observed because of fouling in multiple‐effect evaporator (MEE) systems, which finally decreases the yield of the MEE system. In the present work, a time‐dependent exhaust steam temperature profile has been developed ...

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Novel temperature‐sensitive and pH‐sensitive polyurethane membranes: preparation and characterization

10.12.2014 | Hu Zhou, Bin Yu, Ruiping Xun, Ning Li, Kejian Wu, Hanzhou Sun, Zhihua Zhou, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT The polyurethane (PU) membranes with temperature and pH double sensitivities for water permeation were designed and prepared from a two‐step solution polymerization from the crystalline polycaprolactone diols (PCL), 4,4′‐diphenylmethane diisocyanate (MDI) and pH‐sensitive ...

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