Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/45836
Title: Torrefação e carbonização de briquetes de resíduos do processamento dos grãos de café
Other Titles: Torrefaction and carbonization of briquettes made with residues from coffee grain
Keywords: Carbon
Pyrolysis
Energy
Heat treatment
Carbono
Pirólise
Energia
Tratamento térmico
Issue Date: Nov-2012
Publisher: Universidade Federal de Campina Grande (UFCG), Unidade Acadêmica de Engenharia Agrícola (UAEA)
Citation: PROTÁSIO, T. de P. et al. Torrefação e carbonização de briquetes de resíduos do processamento dos grãos de café. Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 16, n. 11, p. 1252-1258, nov. 2012. DOI: 10.1590/S1415-43662012001100015.
Abstract: This research aimed to evaluate the briquettes made with residues from processing of coffee grain submitted to carbonization and torrefaction. The briquettes were carbonized at a heating rate of 1.67 ºC min-1 with initial temperature of 50 ºC and final of 450 ºC, which was kept during 30 min. The torrefaction of the briquettes was made in a muffle furnace at two heating rates: 1.5 and 3.0 ºC min-1 until 250 ºC, temperature kept during 60 min. The yields in torrefied and carbonized briquettes, pyroligneous liquor, non-condensable gases and fixed carbon were determined. For all briquettes the fixed carbon, ash, volatile and elemental components (C, H, N, S, O) contents and higher heating value, apparent and energetic density and resistance to diametric compression were quantified. The carbonized briquette presented high energetic potential due to higher fixed and elemental carbon content and heating value, but had low mechanical resistance. The briquettes torrified at the two considered heating rates presented similar energetic properties and characteristics, but lower energetic density than carbonized and fresh briquettes.
URI: http://repositorio.ufla.br/jspui/handle/1/45836
Appears in Collections:DEG - Artigos publicados em periódicos



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