Perfil Térmico e Controle da Carbonização em Forno Circular por Meio da Temperatura Interna

Damásio, Renato Augusto Pereira; Oliveira, Aylson Costa; Carneiro, A. C. O.; Barcelos, D. C.; Pereira, Bárbara Luísa Corradi; Magalhães, Mateus Alves de; Silva, C.M.S.

doi:10.12953/2177-6830/rcm.v6n1p11-22

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…Due to the climatic conditions of heavy rainfall and the absence of measurements in nocturnal periods was crucial to obtain these results, which were limiting factors for the implementation and obtaining better results. The studies conducted by [38], found average coal yield results of 26.4% for carbonization without temperature control and 33.2% with temperature control. This emphasises the importance of monitoring at all stages of carbonization and its impact on the gravimetric yield and quality of the charcoal produced.…”

Section: Discussionmentioning

confidence: 99%

Kiln-Furnace System: Validation of a Technology for Producing Charcoal with Less Environmental Impact in Brazil

Da Silva,

Arantes,

Marcelino

et al. 2024

Forests

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Brazil is the world’s largest producer of charcoal. Therefore, there is need for improvement in the gravimetric yield of conversion and the reduction of gas emissions, including greenhouse gases (GHGs), released during carbonization. The objective was to apply the methodology of Measurement, Reporting and Verification (MRV) to evaluate the emission of GHG, mainly CO2 and CH4. The charcoal production kiln-furnace system used was composed of 4 kilns with a capacity of ~6 t of wood, each. The MRV cluster of coal gravimetric yield and gas burners were used to determine the gravimetric yield and burner efficiency and thus evaluate the emission of GHGs generated in the carbonization system. The carbonization was performed in an isolated way producing, in total, 3.34 t of charcoal, with an average gravimetric yield of 25.82%. The MRV methodology was effective for evaluating the GHG emissions. The wood burner reduced by 50% the methane burning and provided a reduction of 0.392 tCO2 eq (23.91%). The humidity of wood and high precipitation were the main limiting factors in this research, and responsible for the decrease in the gravimetric yield. The kiln-furnace system was effective for a sustainable production with the use of non-continuous carbonization gas burners.

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Section: Discussionmentioning

confidence: 99%

Kiln-Furnace System: Validation of a Technology for Producing Charcoal with Less Environmental Impact in Brazil

Da Silva,

Arantes,

Marcelino

et al. 2024

Forests

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“…In this study, the average charcoal friability value was equal to 20.8% (Table 2), being characterized as medium strength material according to the CETEC classification, Oliveira et al (1982). Damásio et al (2015) determined the friability of eucalyptus charcoal produced in a circular kiln with carbonization temperature control, and the researchers obtained an index of 15.28%, which is similarly classified as medium resistance.…”

Section: Charcoal Qualitymentioning

confidence: 99%

“…The carbonization of wood consists of its heating in the controlled presence of oxygen at temperatures above 150°C and results in effective charcoal production at temperatures between 350 and 500 °C (Oliveira et al, 1982). Nevertheless, there is a great variation in the kiln internal temperature during carbonization, presenting higher temperatures in the central and upper regions (Carvalho et al, 2012;Damásio et al, 2015). Thus, controlling the carbonization process based on the internal temperature becomes necessary to increase production and decrease the heterogeneity of charcoal produced in rectangular kilns.…”

Section: Introductionmentioning

confidence: 99%

Carbonization temperature and charcoal properties at different positions in rectangular kiln

Oliveira

Ramos

Pereira

et al. 2020

Agraria

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To increase production and decrease the heterogeneity of charcoal produced in rectangular kilns, the control of carbonization must be carried out based on the kiln internal temperature. The objective of this work was to analyze the maximum carbonization temperature and the time of thermal degradation at temperatures above 290 °C based on the internal kiln wall temperatures, in addition to evaluating charcoal properties in different positions of a rectangular kiln. Wood from the hybrid Eucalyptus urophylla x E. grandis at seven years of age was used for carbonization in rectangular kiln where temperature was monitored and controlled. Process parameters and charcoal quality were evaluated in seven positions in the rectangular kiln. Positions 1 and 7 had higher maximum temperature values and thermal degradation time at temperatures above 290 °C in comparison with the other positions, which presented similar values. There was no significant effect of kiln position on the characteristics of charcoal, which presented average values of 234.61 kg m-3 of bulk density; 55.87% of pieces with size greater than 30 mm; 19.77% of fines (granulometry < 9.5 mm); and 20.80% of friability, 75.39% of fixed carbon, 24.37% of volatile materials, and 0.24% of ash. It was concluded that the kiln position affects the temperature and time of thermal degradation; however, the control of temperature guarantees the production of homogeneous charcoal throughout the kiln, presenting satisfactory quality for steel industry usage.

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“…It is known that the yield and the quality of charcoal are higher in wood with higher densities and high lignin contents (Vale et al, 2001). For Damásio et al (2015) the quality of charcoal is related to the physical and chemical properties of the wood and to the carbonization activities. Rezende et al (1997) stated that to maintain themselves in increasing development, organizations in the forestry industry should focus primarily on optimizing these activities, improving product and service quality, reducing losses, improving equipment efficiency, maximizing productivity, and minimizing production costs.…”

Section: Introductionmentioning

confidence: 99%

Yield From Forest Harvesting Operations for the Production of Charcoal in the State of Minas Gerais

Lana¹,

Timofeiczyk²,

Silva³

et al. 2019

JAS

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The charcoal is a renewable natural resource, produced from wood by the process of carbonization and with great energetic importance. However, there is still little research and use of new technologies to optimize the use of wood in the production of charcoal. Therefore, the present work was aimed at analyzing the yield from forest harvesting operations for the production of charcoal. The research was developed at Vallourec e Mannesmann Florestal, a company located at Itapoã farm, municipality of Paraopeba, Minas Gerais. To this end, the harvest and timber transport operations in the short log system, the carbonization, and the properties of the charcoal produced were assessed. To this end, data was collected from eighteen 9-hour shifts for the Harvester, fifty-four 9-hour shifts for the forwarder, and 36 carbonization cycles. The equipment was analyzed working with three different log lengths—2.1 m, 3.7 m, and 5.0 m. The results demonstrate, during the cutting and processing, that the yield by cutting longer logs is higher. Likewise, at forwarding, the operation’s yield increases according to log length for thick and thin logs. Finally, concerning carbonization, the yield at the furnace loading stage was higher as the length of the log used increased, however, upon unloading the furnace, it was when it decreased.

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Perfil Térmico e Controle da Carbonização em Forno Circular por Meio da Temperatura Interna

Cited by 4 publications

References 5 publications

Kiln-Furnace System: Validation of a Technology for Producing Charcoal with Less Environmental Impact in Brazil

Kiln-Furnace System: Validation of a Technology for Producing Charcoal with Less Environmental Impact in Brazil

Carbonization temperature and charcoal properties at different positions in rectangular kiln

Yield From Forest Harvesting Operations for the Production of Charcoal in the State of Minas Gerais

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