Results 151 to 160 of about 24,857 (208)
Energy Conversion and Management, 2012 Combustion characteristics of two different coal samples were investigated using power compensating type differential scanning calorimeter (DSC) and thermogravimetry (TG-DTG) at different heating rates (5, 10 and 15 degrees C/min).
Mustafa Versan Kok
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Journal of Thermal Analysis and Calorimetry, 2018 This work aims to determine if thermogravimetry could be used to determine the degree of conversion of soybean oil to biodiesel without knowing the amount of ester in the sample, comparing the results with the values obtained by the standard method, gas ...
Caroline Gaglieri +2 more
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Characterization of lignocellulose biomass and model compounds by thermogravimetry
Energy Sources, Part A: Recovery, Utilization and Environmental Effects, 2017 In this research, combustion characteristics of lignocellulose biomass (hazelnut shell) and three main components (cellulose, hemicellulose, and lignin) were investigated using thermogravimetry (TGA-DTG) technique at different heating rates. The ignition,
Mustafa Versan Kok, E Özgur
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“Quasi-isothermal” thermogravimetry
Analytica Chimica Acta, 1971A new method has been worked out which allows the implementation of a special heating program according to which the temperature of the sample is rapidly increased so long as no changes occur in it, while it ensures nearly isothermal conditions when reactions connected with weight change are taking place.
F. Paulik, J. Paulik
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The kinetics of thermogravimetry
European Polymer Journal, 1970Abstract Homogeneous degradation reactions are discussed with reference to thermogravimetric equations. The dimensional inadequacy of most of the previously-used equations is pointed out and rectified. The modified weight integral of the integrated rate equation is calculated for various reaction orders.
J.R. MacCallum, J. Tanner
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2016
Thermogravimetry is the study of the relationship between a sample's mass and its temperature. Thus it is possible to study physical or chemical processes that cause a material to lose volatile gases. These include sublimation, evaporation, and thermal degradation.
Vicky L. Kett, Duncan M. Price
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Thermogravimetry is the study of the relationship between a sample's mass and its temperature. Thus it is possible to study physical or chemical processes that cause a material to lose volatile gases. These include sublimation, evaporation, and thermal degradation.
Vicky L. Kett, Duncan M. Price
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Journal of Thermal Analysis and Calorimetry, 2000
The well-known divergence between the present ‘state of the art’ of thermogravimetry and industrial requirements is discussed. Sources of errors are analyzed and the optimization of measuring conditions is discussed regarding the problems associated with static and dynamic (flow) atmospheres, and interactions between materials and gases or vapors ...
J. Czarnecki, J. Šesták
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The well-known divergence between the present ‘state of the art’ of thermogravimetry and industrial requirements is discussed. Sources of errors are analyzed and the optimization of measuring conditions is discussed regarding the problems associated with static and dynamic (flow) atmospheres, and interactions between materials and gases or vapors ...
J. Czarnecki, J. Šesták
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Rate Equations in Thermogravimetry
Nature, 1970MacCallum and Tanner1 have argued persuasively for modifying the rate equations used in thermogravimetry, but their conclusions are incorrect. There is no fundamental error of the kind they suggest in the usually accepted procedures and some other reason must be found for discrepancies in derived kinetic parameters.
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Micromechanical thermogravimetry
Chemical Physics Letters, 1998We demonstrate a new method for thermal analysis of nanogram quantities of material using a micromechanical thermogravimetric technique. The cantilever-type device uses an integrated piezoresistor to sense bending and simultaneously to ramp the temperature and control temperature cycles. It has a mass resolution in the picogram range.
Berger, R. +7 more
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Thermal standards in thermogravimetry
Talanta, 1967Comparisons of thermogravimetric data from different instruments have often led to controversy because of lack of appreciation that the values are influenced by the apparatus used. Consequently, it is suggested that various compounds be employed as thermal standards for comparing data from different sources. The paper also discusses the variables to be
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