Documents disponibles écrits par cet auteur

Evaluation of a tert - butyl peroxybenzoate runaway reaction by five kinetic models / Jo-Ming Tseng in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4783–4787 Titre : Evaluation of a tert - butyl peroxybenzoate runaway reaction by five kinetic models Type de document : texte imprimé Auteurs : Jo-Ming Tseng, Auteur Année de publication : 2011 Article en page(s) : pp. 4783–4787 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Kinetic Résumé : This study focuses on understanding the basic kinetic parameters associated with runaway reactions for tert-butyl peroxybenzoate (TBPB), which is a strong free-radical source. TBPB is used as a polymerization initiator, catalyst, vulcanizing agent, cross-linking agent, and chemical intermediate. Runaway reactions can either be induced by hot spots or caused by insufficient heat removal. It is important to understand the decomposition reactions that may result in a runaway reaction. To do so, one must evaluate the thermal kinetic parameters, such as activation energy, frequency factor, and reaction order to make the process safer. Most investigations focus on methyl ethyl ketone peroxide, di-tert-butyl peroxide, and cumene hydroperoxide. The kinetic parameters indicate the degree of thermal hazard based on accidents triggered by TBPB. This study uses mathematical models of the Coats−Redfern equation, the Arrhenius equation, the corrected kinetic equation, the Kissinger equation, and the Ozawa equation to study these kinetic parameters. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100640t [article] Evaluation of a tert - butyl peroxybenzoate runaway reaction by five kinetic models [texte imprimé] / Jo-Ming Tseng, Auteur . - 2011 . - pp. 4783–4787. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4783–4787 Mots-clés : Kinetic Résumé : This study focuses on understanding the basic kinetic parameters associated with runaway reactions for tert-butyl peroxybenzoate (TBPB), which is a strong free-radical source. TBPB is used as a polymerization initiator, catalyst, vulcanizing agent, cross-linking agent, and chemical intermediate. Runaway reactions can either be induced by hot spots or caused by insufficient heat removal. It is important to understand the decomposition reactions that may result in a runaway reaction. To do so, one must evaluate the thermal kinetic parameters, such as activation energy, frequency factor, and reaction order to make the process safer. Most investigations focus on methyl ethyl ketone peroxide, di-tert-butyl peroxide, and cumene hydroperoxide. The kinetic parameters indicate the degree of thermal hazard based on accidents triggered by TBPB. This study uses mathematical models of the Coats−Redfern equation, the Arrhenius equation, the corrected kinetic equation, the Kissinger equation, and the Ozawa equation to study these kinetic parameters. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100640t

Green thermal analysis technology for evaluating the thermal hazard of di-tert-butyl peroxide / Jo-Ming Tseng in Industrial & engineering chemistry research, Vol. 50 N° 16 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9487–9494 Titre : Green thermal analysis technology for evaluating the thermal hazard of di-tert-butyl peroxide Type de document : texte imprimé Auteurs : Jo-Ming Tseng, Auteur Année de publication : 2011 Article en page(s) : pp. 9487–9494 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Hazard  Thermal  analysis Résumé : Di-tert-butyl peroxide (DTBP) has been widely employed in chemical industries. Unfortunately, many serious explosions and fires have occurred during the manufacturing process, storage, and transportation of organic peroxides. This study investigated the thermokinetic parameters by isothermal-kinetic and nonisothermal-kinetic simulation, using differential scanning calorimetry (DSC) tests. Green thermal analysis technology was applied to assess the kinetic parameters, such as the kinetic model, frequency factor (ln k0), activation energy (Ea), reaction order, heat of reaction (ΔHd), etc. Comparisons of nonisothermal and isothermal kinetic model simulation led to a beneficial kinetic model of thermal decomposition to predict the thermal hazard of DTBP. Simulations in 0.5 L Dewar vessel and 25 kg barrel commercial package in liquid thermal explosion models were performed and compared to the results in the literature. From the results, we determined the DTBP of the optimal conditions to avoid violent runaway reactions during the storage and transportation. This study established the features of green thermal analysis technology that could be executed as a reduction of energy potential and storage conditions in view of loss prevention. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425189 [article] Green thermal analysis technology for evaluating the thermal hazard of di-tert-butyl peroxide [texte imprimé] / Jo-Ming Tseng, Auteur . - 2011 . - pp. 9487–9494. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9487–9494 Mots-clés : Hazard  Thermal  analysis Résumé : Di-tert-butyl peroxide (DTBP) has been widely employed in chemical industries. Unfortunately, many serious explosions and fires have occurred during the manufacturing process, storage, and transportation of organic peroxides. This study investigated the thermokinetic parameters by isothermal-kinetic and nonisothermal-kinetic simulation, using differential scanning calorimetry (DSC) tests. Green thermal analysis technology was applied to assess the kinetic parameters, such as the kinetic model, frequency factor (ln k0), activation energy (Ea), reaction order, heat of reaction (ΔHd), etc. Comparisons of nonisothermal and isothermal kinetic model simulation led to a beneficial kinetic model of thermal decomposition to predict the thermal hazard of DTBP. Simulations in 0.5 L Dewar vessel and 25 kg barrel commercial package in liquid thermal explosion models were performed and compared to the results in the literature. From the results, we determined the DTBP of the optimal conditions to avoid violent runaway reactions during the storage and transportation. This study established the features of green thermal analysis technology that could be executed as a reduction of energy potential and storage conditions in view of loss prevention. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425189