Estimation of activation energies from differential thermal analysis curves
An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of...
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E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1973 |
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Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 |
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in: Thermochimica Acta - Amsterdam : Elsevier, 6(1973), 4, Seite 345-351 |
| Übergeordnetes Werk: |
volume:6 ; year:1973 ; number:4 ; pages:345-351 |
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| 245 | 1 | 0 | |a Estimation of activation energies from differential thermal analysis curves |
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| 520 | |a An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study. | ||
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(DE-627)NLEJ174631111 (DE-599)GBVNLZ174631111 DE-627 ger DE-627 rakwb eng Estimation of activation energies from differential thermal analysis curves 1973 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Borham, B.M. oth Olson, F.A. oth in Thermochimica Acta Amsterdam : Elsevier 6(1973), 4, Seite 345-351 (DE-627)NLEJ174595298 (DE-600)1500974-9 0040-6031 nnns volume:6 year:1973 number:4 pages:345-351 http://linkinghub.elsevier.com/retrieve/pii/0040-6031(73)87001-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 6 1973 4 345-351 |
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(DE-627)NLEJ174631111 (DE-599)GBVNLZ174631111 DE-627 ger DE-627 rakwb eng Estimation of activation energies from differential thermal analysis curves 1973 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Borham, B.M. oth Olson, F.A. oth in Thermochimica Acta Amsterdam : Elsevier 6(1973), 4, Seite 345-351 (DE-627)NLEJ174595298 (DE-600)1500974-9 0040-6031 nnns volume:6 year:1973 number:4 pages:345-351 http://linkinghub.elsevier.com/retrieve/pii/0040-6031(73)87001-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 6 1973 4 345-351 |
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(DE-627)NLEJ174631111 (DE-599)GBVNLZ174631111 DE-627 ger DE-627 rakwb eng Estimation of activation energies from differential thermal analysis curves 1973 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Borham, B.M. oth Olson, F.A. oth in Thermochimica Acta Amsterdam : Elsevier 6(1973), 4, Seite 345-351 (DE-627)NLEJ174595298 (DE-600)1500974-9 0040-6031 nnns volume:6 year:1973 number:4 pages:345-351 http://linkinghub.elsevier.com/retrieve/pii/0040-6031(73)87001-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 6 1973 4 345-351 |
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(DE-627)NLEJ174631111 (DE-599)GBVNLZ174631111 DE-627 ger DE-627 rakwb eng Estimation of activation energies from differential thermal analysis curves 1973 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Borham, B.M. oth Olson, F.A. oth in Thermochimica Acta Amsterdam : Elsevier 6(1973), 4, Seite 345-351 (DE-627)NLEJ174595298 (DE-600)1500974-9 0040-6031 nnns volume:6 year:1973 number:4 pages:345-351 http://linkinghub.elsevier.com/retrieve/pii/0040-6031(73)87001-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 6 1973 4 345-351 |
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(DE-627)NLEJ174631111 (DE-599)GBVNLZ174631111 DE-627 ger DE-627 rakwb eng Estimation of activation energies from differential thermal analysis curves 1973 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Borham, B.M. oth Olson, F.A. oth in Thermochimica Acta Amsterdam : Elsevier 6(1973), 4, Seite 345-351 (DE-627)NLEJ174595298 (DE-600)1500974-9 0040-6031 nnns volume:6 year:1973 number:4 pages:345-351 http://linkinghub.elsevier.com/retrieve/pii/0040-6031(73)87001-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 6 1973 4 345-351 |
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Estimation of activation energies from differential thermal analysis curves |
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An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study. |
| abstractGer |
An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study. |
| abstract_unstemmed |
An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">NLEJ174631111</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20210705215945.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">070505s1973 xx |||||o 00| ||eng c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ174631111</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)GBVNLZ174631111</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Estimation of activation energies from differential thermal analysis curves</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1973</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">An average activation energy ΔE of 31.7 +/- 10.0 kcal/mole was calculated from exothermic peaks of urea nitrate differential thermal analysis (DTA) curves using the Murray and White equation and various other reaction rate equations developed by the authors. An average enthalpy of activation, ΔH of 30.8 +/-9.7 kcal/mole was calculated from the same results. The values of ΔE and ΔH differed by a fraction of a kcal/mole indicating that ΔE <ΔH cannot be differentiated experimentally in our study. Application of the Kissinger method of calculating ΔE and ΔH produced respectively 21.6 +/-7.9 and 20.7 +/-8.0 kcal/mole, which are quite low. The values of ΔE and ΔH calculated thermogravimetrically were 28.1, +/- 1.1 kcal/mole and 27.6 +/- 1.2 kcal/mole which are close to those obtained from the Murray and White approach and the authors' approach to treatment of the DTA data. These results illustrate the pronounced effect of self heating on calculation of activation energies. The Kissinger method of calculating the reaction order developed for endothermic DTA peaks produced good results when applied to the present DTA study.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">Elsevier Journal Backfiles on ScienceDirect 1907 - 2002</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Borham, B.M.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Olson, F.A.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Thermochimica Acta</subfield><subfield code="d">Amsterdam : Elsevier</subfield><subfield code="g">6(1973), 4, Seite 345-351</subfield><subfield code="w">(DE-627)NLEJ174595298</subfield><subfield code="w">(DE-600)1500974-9</subfield><subfield code="x">0040-6031</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:6</subfield><subfield code="g">year:1973</subfield><subfield code="g">number:4</subfield><subfield code="g">pages:345-351</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://linkinghub.elsevier.com/retrieve/pii/0040-6031(73)87001-7</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_H</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-SDJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">6</subfield><subfield code="j">1973</subfield><subfield code="e">4</subfield><subfield code="h">345-351</subfield></datafield></record></collection>
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