Kinetic studies of graphon and coal char reaction with NO and O2: Direct non-linear regression from TG curves.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F05%3A00000017" target="_blank" >RIV/61988987:17310/05:00000017 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Kinetic studies of graphon and coal char reaction with NO and O2: Direct non-linear regression from TG curves.

Original language description

The reactions of carbonaceous materials (graphon and coal-char) with NO, O2 and NO+O2 were investigated by a thermogravimetric analysis (TGA). A method of direct non-linear regression of the kinetic equation was applied for a simultaneous calculation ofthe apparent activation energy, frequency factor and reaction order from a single TG curve of carbon gasification in various atmospheres. It was proven that the proposed calculation method is applicable for the calculation of kinetic parameters from overlapping processes. Calculations from TG curves of the above reactions demonstrate that NO-carbon and (NO+O2)-carbon reactions contain two processes, while O2-carbon is a single process. The reaction order of O2-carbon is approximate 0.5, while the reaction orders of NO-carbon or (NO+O2)-carbon reaction are dependent on the process and type of carbon. Graphon shows higher apparent activation energy than coal-char due to the pore structure and uncatalysed effects.

Czech name

Kinetika reakce grafitu a koksu s NO a O2

Czech description

The reactions of carbonaceous materials (graphon and coal-char) with NO, O2 and NO+O2 were investigated by a thermogravimetric analysis (TGA). A method of direct non-linear regression of the kinetic equation was applied for a simultaneous calculation ofthe apparent activation energy, frequency factor and reaction order from a single TG curve of carbon gasification in various atmospheres. It was proven that the proposed calculation method is applicable for the calculation of kinetic parameters from overlapping processes. Calculations from TG curves of the above reactions demonstrate that NO-carbon and (NO+O2)-carbon reactions contain two processes, while O2-carbon is a single process. The reaction order of O2-carbon is approximate 0.5, while the reaction orders of NO-carbon or (NO+O2)-carbon reaction are dependent on the process and type of carbon. Graphon shows higher apparent activation energy than coal-char due to the pore structure and uncatalysed effects.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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Project

<a href="/en/project/GA105%2F03%2F0538" target="_blank" >GA105/03/0538: Initial stage of spontaneous heating of the coal and the possibilities of its affecting</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2005

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Fuel Processing Technology

ISSN

0378-3820

e-ISSN

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Volume of the periodical

86

Issue of the periodical within the volume

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Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

651

UT code for WoS article

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EID of the result in the Scopus database

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