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1.267 Aktuelle Fachpublikationen zum Thema temperature

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01.10.2015 | María Dolores López‐Ramírez, Ulises Miguel García‐Ventura, Fabricio Omar Barroso‐Muñoz, Juan Gabriel Segovia‐Hernánd ..., Chemical Engineering & Technology, 2015

Abstract The esterification of oleic acid and methanol using sulfuric acid as a homogeneous catalyst is studied in reactive‐separation systems. The conversion of the free fatty acid was investigated in two different experiments with the following variables: molar ratio of methanol/oleic acid, ...


Tailoring microstructure and mechanical properties of injection molded isotactic–polypropylene via high temperature preshear

29.09.2015 | Baobao Chang, Bo Wang, Guoqiang Zheng, Kun Dai, Chuntai Liu, Changyu Shen, Polymer Engineering and Science, 2015

In this work, isotactic–polypropylene (iPP) specimens were prepared by a modified injection molding machine, in which high temperature preshear (HTPS) can be imposed on the molten polymer during the plasticizing stage. The effect of HTPS on the microstructure and mechanical property of iPP was ...


Alkaline partial wet oxidation of lignin for production of carboxylic acids

22.09.2015 | Abayneh Getachew Demesa, Arto Laari, Ilkka Turunen, Mika Sillanpää, Chemical Engineering & Technology, 2015

Abstract Production of carboxylic acids by partial wet oxidation of alkali lignin was studied experimentally. The factors influencing the different types of products, their yields and concentrations were investigated. Formic, acetic, succinic, oxalic and glutaconic acids were the main ...


Enhancing the temperature stability of PLA by compounding strategies

18.09.2015 | Stephan Laske, Wolfgang Ziegler, Markus Kainer, Johannes Wuerfel, Clemens Holzer, Polymer Engineering and Science, 2015

The low thermal stability of polylactid acid (PLA) limits its use for various applications such as microwave‐ready dishes or hot beverage packaging. Furthermore, contained items might be damaged by occurring temperature peaks during transport (e.g., shipping container internal temperature ...


Electrical conduction mechanism in plasma polymerized 2‐(diethylamino)ethyl methacrylate thin films

18.09.2015 | Tamanna Afroze, A. H. Bhuiyan, Polymer Engineering and Science, 2015

Thin films of different thicknesses were prepared through glow discharge of 2‐(diethylamino)ethyl methacrylate (DEAEMA) using a capacitively coupled reactor. Current density–voltage (J–V) characteristics for plasma polymerized (PP) DEAEMA thin films of thicknesses 100, 200, 250, and 300 nm in ...


Glycerol dehydration to acrolein: Selectivity control over CsPW/Nb2O5 catalyst

17.09.2015 | Chang Liu, Rong Liu, Tiefeng Wang, The Canadian Journal of Chemical Engineering, 2015

Abstract The catalytic dehydration of glycerol to acrolein is a very attractive alternative to the propylene‐based process, due to the future exhaustion of fossil feedstocks and the increasing production of biomass‐based glycerol. This work aimed to study the selectivity control over ...


CSB investigation of Chevron Richmond refinery pipe rupture and fire

14.09.2015 | Lauren Grim, Dan Tillema, Steve Cutchen, Mark Wingard, Amanda Johnson, Process Safety Progress, 2015

The U.S. Chemical Safety and Hazard Investigation Board (CSB) investigated a pipe rupture of a high temperature light gas oil line at the Chevron Richmond Refinery in Richmond, CA. The CSB found technical, regulatory, and Chevron organizational factors causal to the incident. This article is a ...


Synthesis gas production with simultaneous CO2 capturing and consuming: Application of chemical looping combustion by employing Fe45‐Al2O3 and Mn40/Mg–ZrO2 oxygen carriers

12.09.2015 | Mohsen Abbasi, Mehdi Farniaei, Mohammad Reza Rahimpour, Alireza Shariati, Saeid Abbasi, The Canadian Journal of Chemical Engineering, 2015

Abstract In this study, thermal coupling of chemical looping combustion (CLC) and dry reforming of methane (DR) via employment of Fe45‐Al2O3 and Mn40/Mg–ZrO2 oxygen carriers (OCs) were investigated. The main aim of this configuration (CLC‐DR) is the prevention of large CO2 emissions to the ...


Investigation on thermal behavior and sulfur release characteristics from rice husk and bituminous coal co‐firing under O2/CO2 atmosphere

11.09.2015 | Yaji Huang, Lihui Zhang, Feng Duan, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract The synergistic interaction of rice husk (RH), Huaibei bituminous coal (HB coal), and their blends was investigated under O2/CO2 combustion condition by thermogravimetric analysis. The RH was blended with HB coal in the range of 20–40 wt% to investigate the co‐combustion profile. ...


DMA testing of epoxy resins: The importance of dimensions

10.09.2015 | Ian M. McAninch, Giuseppe R. Palmese, Joseph L. Lenhart, John J. La Scala, Polymer Engineering and Science, 2015

Dynamic mechanical analysis is commonly used to characterize thermoset polymers at temperatures ranging from well below to well above their glass transition temperatures. Many sample fixtures are available; however, the best clamp and best sample dimensions for a given material are not often ...


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