THERMAL DECOMPOSITION AND KINETIC STUDIES OF TANNIC ACID USING MODEL FREE-METHODS

ABSTRACT In this manuscript, thermal and kinetic features of a tannic acid was studied by simultaneous TG-DTA techniques in the nitrogen atmosphere at four heating rate. It was observed that thermal decomposition of its constituents occurred in two steps. Model free isoconversional methods namely mo...

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Autores principales:	Ahmad,Naushad, Alam,Manawwer, Naushad,Mu., Ansari,Anees A., Alrayes,Basel F., Alotaibe,Mshari A.
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2018
Materias:	Tannic acid Thermal decomposition kinetics Isoconversional methods
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072018000103824
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spelling	oai:scielo:S0717-970720180001038242018-05-11THERMAL DECOMPOSITION AND KINETIC STUDIES OF TANNIC ACID USING MODEL FREE-METHODSAhmad,NaushadAlam,ManawwerNaushad,Mu.Ansari,Anees A.Alrayes,Basel F.Alotaibe,Mshari A. Tannic acid Thermal decomposition kinetics Isoconversional methods ABSTRACT In this manuscript, thermal and kinetic features of a tannic acid was studied by simultaneous TG-DTA techniques in the nitrogen atmosphere at four heating rate. It was observed that thermal decomposition of its constituents occurred in two steps. Model free isoconversional methods namely modified Coast-Redfern (CR), Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO) and Freidman (FR) were used for revelation of decomposition kinetics (Ea and lnA) on the whole range of temperature. Mechanisms of decomposition process have been found to follow first order of decomposition rate. Reaction order does not have a substantial effect on the process because of the high value of pre-exponential factor. It was observed that, at the last stage of decomposition process, value of activation energy and pre-exponential factor increased. Decomposition of tannic acid was confirmed by IR spectroscopy.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.63 n.1 20182018-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072018000103824en10.4067/s0717-97072018000103824
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Tannic acid Thermal decomposition kinetics Isoconversional methods
spellingShingle	Tannic acid Thermal decomposition kinetics Isoconversional methods Ahmad,Naushad Alam,Manawwer Naushad,Mu. Ansari,Anees A. Alrayes,Basel F. Alotaibe,Mshari A. THERMAL DECOMPOSITION AND KINETIC STUDIES OF TANNIC ACID USING MODEL FREE-METHODS
description	ABSTRACT In this manuscript, thermal and kinetic features of a tannic acid was studied by simultaneous TG-DTA techniques in the nitrogen atmosphere at four heating rate. It was observed that thermal decomposition of its constituents occurred in two steps. Model free isoconversional methods namely modified Coast-Redfern (CR), Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO) and Freidman (FR) were used for revelation of decomposition kinetics (Ea and lnA) on the whole range of temperature. Mechanisms of decomposition process have been found to follow first order of decomposition rate. Reaction order does not have a substantial effect on the process because of the high value of pre-exponential factor. It was observed that, at the last stage of decomposition process, value of activation energy and pre-exponential factor increased. Decomposition of tannic acid was confirmed by IR spectroscopy.
author	Ahmad,Naushad Alam,Manawwer Naushad,Mu. Ansari,Anees A. Alrayes,Basel F. Alotaibe,Mshari A.
author_facet	Ahmad,Naushad Alam,Manawwer Naushad,Mu. Ansari,Anees A. Alrayes,Basel F. Alotaibe,Mshari A.
author_sort	Ahmad,Naushad
title	THERMAL DECOMPOSITION AND KINETIC STUDIES OF TANNIC ACID USING MODEL FREE-METHODS
title_short	THERMAL DECOMPOSITION AND KINETIC STUDIES OF TANNIC ACID USING MODEL FREE-METHODS
title_full	THERMAL DECOMPOSITION AND KINETIC STUDIES OF TANNIC ACID USING MODEL FREE-METHODS
title_fullStr	THERMAL DECOMPOSITION AND KINETIC STUDIES OF TANNIC ACID USING MODEL FREE-METHODS
title_full_unstemmed	THERMAL DECOMPOSITION AND KINETIC STUDIES OF TANNIC ACID USING MODEL FREE-METHODS
title_sort	thermal decomposition and kinetic studies of tannic acid using model free-methods
publisher	Sociedad Chilena de Química
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072018000103824
work_keys_str_mv	AT ahmadnaushad thermaldecompositionandkineticstudiesoftannicacidusingmodelfreemethods AT alammanawwer thermaldecompositionandkineticstudiesoftannicacidusingmodelfreemethods AT naushadmu thermaldecompositionandkineticstudiesoftannicacidusingmodelfreemethods AT ansarianeesa thermaldecompositionandkineticstudiesoftannicacidusingmodelfreemethods AT alrayesbaself thermaldecompositionandkineticstudiesoftannicacidusingmodelfreemethods AT alotaibemsharia thermaldecompositionandkineticstudiesoftannicacidusingmodelfreemethods
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THERMAL DECOMPOSITION AND KINETIC STUDIES OF TANNIC ACID USING MODEL FREE-METHODS

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