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1.126 Aktuelle Fachpublikationen zum Thema temperature

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Replacement of CH4 in Hydrate in Porous Sediments with Liquid CO2 Injection

13.11.2014 | Yu Zhang, Li‐Jun Xiong, Xiao‐Sen Li, Zhao‐Yang Chen, Chun‐Gang Xu, Chemical Engineering & Technology, 2014

Abstract The dynamics of the replacement of CH4 in hydrate in porous sediments with liquid CO2 was investigated using a self‐developed experimental apparatus at different temperatures and initial pressures. The pressure increases steadily as the replacement reaction processes. The amount of ...

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Prediction of Air Specific Heat Ratios at Elevated Pressures Using a Novel Modeling Approach

13.11.2014 | Arash Kamari, Amir H. Mohammadi, Alireza Bahadori, Sohrab Zendehboudi, Chemical Engineering & Technology, 2014

Abstract An accurate and efficient model based on least‐squares support vector machines (LSSVM) is developed for the determination of air specific heat ratios at elevated pressures. Additionally, the coupled simulated annealing optimization strategy is used to calculate the optimal values of ...

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Synthesis of nanostructure hydroxy sodalite composite membranes via hydrothermal method: support surface modification and synthesis method effects

13.11.2014 | Neda Kalantari, Mohammad Javad Vaezi, Mostafa Yadollahi, Ali Akbar Babaluo, Behruz Bayati, Akram Kazemzadeh, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT Multilayer hydroxy sodalite zeolite membranes were synthesized on the outer surface of support with and without modification via in situ and secondary growth hydrothermal synthesis methods. The synthesized zeolite membranes were characterized by X‐ray diffraction, scanning electron ...

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Local measurement of mass transfer in a reactive spray for CO2 capture

13.11.2014 | Maria Ouboukhlik, Sawitree Saengkaew, Marie‐Christine Fournier‐Salaün, Lionel Estel, Gérard Grehan, The Canadian Journal of Chemical Engineering, 2014

Abstract CO2 capture is still a major challenge for the environment and decarbonisation of gas streams. It has been industrially feasible for several decades using chemical absorption by alkanolamine solvents. The purpose of this work is to characterize the mass transfer in a spray contactor ...

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Exothermicity in wood torrefaction and its impact on product mass yields: From micro to pilot scale

13.11.2014 | Sofien Cavagnol, John F. Roesler, Elena Sanz, Willi Nastoll, Pin Lu, Patrick Perré, The Canadian Journal of Chemical Engineering, 2014

Abstract This paper focuses on the effects of exothermic reactions during torrefaction, a mild heat treatment process in the temperature range 200 to 300°C. Three different scales are considered, the micro‐particle (powder scale), the macro‐particle (woodchips or larger) and the thick fixed ...

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Development of a modelling tool representing biomass gasification step in a dual fluidised bed

13.11.2014 | Halima Noubli, Sylvie Valin, Bertrand Spindler, Mehrdji Hemati, The Canadian Journal of Chemical Engineering, 2014

Abstract The aim of the present study is to develop a 1D modelling tool representing biomass gasification in a dual fluidized bed. This tool should be used with the objective to control and scale‐up the process for different pilot scales and operating conditions. This implies that the ...

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Using CHETAH to estimate lower flammable limit, minimum ignition energy, and other flammability parameters

08.11.2014 | Laurence G. Britton, Benjamin Keith Harrison, Process Safety Progress, 2014

Britton discovered that with increased “net heat of oxidation” (ΔHox), the maximum flame temperatures of CH and CHO fuels in air increase linearly while flame temperatures at the lower flammable limit (LFL) decrease linearly. Maximum flame temperature is a major factor determining the combustion ...

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Hardware and instrumentation to investigate massive releases of dense phase CO2

05.11.2014 | Didier Jamois, Christophe Proust, Jérome Hebrard, The Canadian Journal of Chemical Engineering, 2014

Abstract CCS is seen as a possibility to mitigate the global warming effect. The practical implementation of this technique faces a few challenges like safety issues. It is wondered if a massive release affecting the pipeline (may be the most vulnerable part of the CCS chain) would not lead ...

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Mathematical Modeling of Ocimum basilicum L. Supercritical CO2 Extraction

05.11.2014 | Zoran Zeković, Snežana Filip, Senka Vidović, Stela Jokić, Sandra Svilović, Chemical Engineering & Technology, 2014

Abstract The effects of pressure and temperature on supercritical extraction of Ocimum basilicum L. in terms of extraction yield and aromatic compounds were investigated. Linalool, eugenol, and δ‐cadinene were indentified as three main compounds of the prepared extracts. The dominant compound ...

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Cu/Ni‐Loaded CeO2‐ZrO2 Catalyst for the Water‐Gas Shift Reaction: Effects of Loaded Metals and CeO2 Addition

05.11.2014 | Busaya Chamnankid, Karin Föttinger, Günther Rupprechter, Paisan Kongkachuichay, Chemical Engineering & Technology, 2014

Abstract Two different types of metals (Cu and Ni) and the effect of CeO2 addition to produce a CeO2‐ZrO2 co‐supporter were investigated through the water‐gas shift (WGS) reaction. It was found that the WGS activity could be enhanced with CeO2 addition. At relatively high temperature, ...

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