Results 311 to 320 of about 40,582 (335)

The Selection of Catalysts by Thermogravimetry

1972
Thermogravimetry is used for rapid testing of catalysts. Studying the ammoxidation of propene we found that the activity of the catalysts depends on the amount of weight loss during heatingwithin a definite range of temperatures (150–250 °C). The weight loss results mainly from dehydration of the surface.
K. Heise, J. Scheve
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Biomass proximate analysis using thermogravimetry

Bioresource Technology, 2013
This work proposes a 25 min-last thermogravimetric method as a tool to determine biomass sample's proximate analysis data (moisture, ash, volatile matter and fixed carbon contents) just by direct measure of weight changes on each sample's TG chart. Compared with international standards commonly used to that aim, TG is a faster and easier to develop ...
García Fernández, Roberto, Pizarro García, Consuelo, Gutiérrez Lavín, Antonio, Bueno de Las Heras, Julio Luis   +3 more
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Micromechanical thermogravimetry

Chemical Physics Letters, 1998
We 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., Lang, H. P., Gerber, C., Gimzewski, J. K., Fabian, J. H., Scandella, L., Meyer, E., Guntherodt, H. J.   +7 more
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Investigation of Evaporation by Thermogravimetry

1972
Thermogravimetry /TG/ and derivative thermogravimetry /DTG/ are adopted to study the phenomenon of evaporation. Analyses show that, besides the geometrical constant of evaporation surface, the size of the sample holder and the quantity of the sample must be optimized in order to avoid anomaly.
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ChemInform Abstract: THERMOGRAVIMETRY OF LITHIUM SPINEL FERRITES

Chemischer Informationsdienst, 1974
AbstractDie Materialverluste von Spinellferriten bei der Wärmebehandlung werden thermogravimetrisch bestimmt.
G. Bandyopadhyay, Richard M. Fulrath
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Coal analysis using thermogravimetry

Thermochimica Acta, 1984
Thermogravimetric analysis is being used increasingly today to obtain kinetic data related to coal decomposition. However, this method is open to criticism on the basis that the meaning of the activation energy of solid state reactions obtained from TG experiments is not clear.
Wei-Ping Pan, M.A. Serageldin
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Evaluation of vacancies and interstitials by thermogravimetry

Thermochimica Acta, 2000
Abstract A procedure to determine the vacancy concentration [V] in magnetite from TG curves when heating α-Fe 2 O 3 in a reducing atmosphere is presented, together with some experimental results. The procedure correlates vacancy and cation concentration with the weight change due to oxygen evolution through the charge and mass balance in the sample.
A. del Cueto, José María Muñoz, C. de Francisco, A. González Arias   +3 more
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Studies of infiltration by apparent thermogravimetry

Journal of Thermal Analysis, 1993
A technique named ‘apparent thermogravimetry’ (ATG) has been developed for studying infiltration phenomena. It has been used for investigating of infiltration of copper, cast iron, and cobalt alloys into porous tungsten, sintered steel, and tungsten carbide.
V. P. Järvelä, Michael Gasik, K. R. Lilius, S. Strömberg   +3 more
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Thermogravimetry of a kaolinite-alunite ore

Thermochimica Acta, 1995
An ore containing kaolinite (Al2O3·2SiO2·2H2O), alunite (KAl3(SO4)2(OH)6), feldspar (KAlSi3O8) and quartz (SiO2) was analysed by TG/DTA to determine the mineralogical composition of samples considered representative of concentrates and tailings likely to be obtained from physical treatments designed to produce a kaolin concentrate as low as possible in
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An apparatus for thermogravimetry in hazardous atmospheres

Journal of Inorganic and Nuclear Chemistry, 1959
Abstract A detailed description is given of the construction and operation of an apparatus, incorporating a commercial pen-recording thermobalance, designed for the study of reactions involving hazardous gases. A leak detector for water-soluble gases has been designed especially for use with the assembly.
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