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@MastersThesis{Ueda:2018:PiOxCo,
               author = "Ueda, Natalia Pellegrine",
                title = "Pir{\'o}lise oxidativa e combust{\~a}o da turfa de S{\~a}o 
                         Jos{\'e} dos Campos",
               school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                 year = "2018",
              address = "S{\~a}o Jos{\'e} dos Campos",
                month = "2018-02-21",
             keywords = "turfa, combust{\~a}o, inc{\^e}ndios, peat, fires, combustion.",
             abstract = "Os inc{\^e}ndios de turfa s{\~a}o os maiores fen{\^o}menos de 
                         combust{\~a}o no planeta Terra. Este trabalho apresenta um estudo 
                         da pir{\'o}lise e da combust{\~a}o de amostras de turfa do 
                         munic{\'{\i}}pio de S{\~a}o Jos{\'e} dos Campos, no vale do 
                         Rio Para{\'{\i}}ba do Sul, em S{\~a}o Paulo. Foram coletadas 
                         amostras, classificadas e determinadas as suas 
                         caracter{\'{\i}}sticas f{\'{\i}}sico-qu{\'{\i}}micas. Foram 
                         analisados os processos de pir{\'o}lise oxidativa e de 
                         combust{\~a}o por an{\'a}lise termogravim{\'e}trica (TGA) e por 
                         calorimetria explorat{\'o}ria diferencial (DSC). Foram efetuadas 
                         an{\'a}lises da pir{\'o}lise e da queima da turfa em 
                         calor{\'{\i}}metro c{\^o}nico, determinando-se emiss{\~o}es, 
                         taxas de queima e taxas de libera{\c{c}}{\~a}o de calor. 
                         Amostras de turfa fibrosa, fibrosa/h{\^e}mica e de solo turfoso 
                         foram obtidas, com valores de umidade variando de 58 a 90 \% em 
                         base {\'u}mida. O teor de umidade depende do tipo de turfa, do 
                         local e do per{\'{\i}}odo da coleta das amostras. As densidades 
                         m{\'e}dias aparentes calculadas foram 0,541, 0,585 e 0,527 
                         g/cm\$^{3}\$ e as densidades da fase s{\'o}lida medidas foram 
                         1,753, 2,023 e 1,559 g/cm\$^[3}\$, respectivamente, para as 
                         amostras de turfa fibrosa, fibrosa/h{\^e}mica e de solo turfoso. 
                         Os poderes calor{\'{\i}}ficos superiores medidos foram de 15171, 
                         6643 e 16800 J/g, obtidos em calor{\'{\i}}metro convencional, e 
                         de 15663, 5428 e 13581 J/g, obtidos por DSC, respectivamente, para 
                         as amostras de turfa fibrosa, fibrosa/h{\^e}mica e de solo 
                         turfoso. Os valores m{\'e}dios encontrados de energia de 
                         ativa{\c{c}}{\~a}o dos processos de pir{\'o}lise oxidativa e de 
                         combust{\~a}o foram, respectivamente, 56461, 55594 e 48400 J/mol 
                         para as turfas fibrosa, fibrosa/h{\^e}mica e para o solo turfoso. 
                         Durante a queima de amostras de turfa em calor{\'{\i}}metro 
                         c{\^o}nico observou-se a predomin{\^a}ncia do processo de 
                         incandesc{\^e}ncia e verificaram-se valores m{\'a}ximos de 
                         emiss{\~a}o de 235 ppm de CO, 1346 ppm de CO\$_{2}\$, 3,1 ppm 
                         de NO\$_{x}\$ e de 142 ppm de UHC no caso da turfa fibrosa, e 
                         127 ppm de CO, 1135 ppm de CO\$_{2}\$, 5,4 ppm de NO\$_{x}\$ e 
                         de 72 ppm de UHC, no caso do solo turfoso. As taxas m{\'a}ximas 
                         de libera{\c{c}}{\~a}o de calor calculadas foram 1245 
                         kW/m\$^{}\$ e 1206 kW/m\$^{}\$, para amostras de turfa 
                         fibrosa e de solo turfoso, respectivamente. ABSTRACT: Peat fires 
                         are the largest combustion phenomena on Earth. This work presents 
                         an experimental study of the pyrolysis and combustion of peat 
                         samples collected in the municipality of S{\~a}o Jos{\'e} dos 
                         Campos, in the Para{\'{\i}}ba do Sul river valley, SP, Brazil. 
                         Firstly, the physico-chemical characteristics of the peat samples 
                         were classified and the oxidative pyrolysis and combustion by 
                         thermogravimetry (TGA) and differential scanning calorimetry (DSC) 
                         were analyzed. Finally, analysis of the pyrolysis and the burning 
                         of the peat in conical calorimeter were carried out, with 
                         determination of emissions, burning rates and heat release rates. 
                         Samples of fibrous, fibrous / hazy peat and turfous soil were 
                         classified. The measured moisture values ranged from 58 to 90% on 
                         wet basis, depending on the type of peat and the location and 
                         timing of sample collection. The calculated average densities of 
                         the fibrous, fibrous / hemic and turfous peat samples were, 
                         respectively, 0.541, 0.585 and 0.527 g/cm\$^{3}\$, whereas the 
                         solid phase densities were 1.753, 2.023 and 1.559 g/cm\$^{3}\$. 
                         Fibrous peat, fibrous/hemic turf and turfous soil presented, 
                         respectively, higher calorific powers around 15171, 6643 and 16800 
                         J/g, obtained in a conventional calorimeter, and 15663, 5428 and 
                         13581 J/g obtained by DSC. The average values of activation energy 
                         of the oxidative pyrolysis and combustion processes were, 
                         respectively, 56461, 55594 and 48400 J/mol for the fibrous, 
                         fibrous/hemic peat and the peaty soil. During burning of peat 
                         samples in a conical calorimeter, the predominance of the 
                         incandescence process was observed and maximum emission values 
                         were determined: 235 ppm of CO, 1346 ppm of CO, 3.1 ppm of 
                         NO\$_{x}\$ and 142 ppm of UHC in the case of fibrous peat, and 
                         127 ppm of CO, 1135 ppm of CO\$_{2}\$, 5.4 ppm of NOx and 72 ppm 
                         of UHC, in the case of turfous soil. The calculated maximum heat 
                         release rates were 1245 kW/m\$^{2}\$ and 1206 kW/m\$^{2}\$ for 
                         samples of peat fibrous and peat soil, respectively.",
            committee = "Costa, Fernando de Souza (presidente/orientador) and Rocha, Ana 
                         Maura (orientadora) and Soares Neto, Turibio Gomes and Krieger 
                         Filho, Guenther Carlos and Mendes, Paulo Roberto Bufacchi",
         englishtitle = "Oxidative pyrolysis and combustion of the peat of the S{\~a}o 
                         Jos{\'e} dos Campos",
             language = "pt",
                pages = "146",
                  ibi = "8JMKD3MGP3W34R/3QNQS72",
                  url = "http://urlib.net/rep/8JMKD3MGP3W34R/3QNQS72",
           targetfile = "publicacao.pdf",
        urlaccessdate = "27 nov. 2020"
}


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