Hidropirolise rapida (HPR) do carvão mineral de candiota

AUTOR(ES)
DATA DE PUBLICAÇÃO

1989

RESUMO

Coal in Brazil is an abundant natural resource, but marginally developed. Main uses are: burning for thermoelectricity or industrial heat, and reducing agent in the steel industry. Samples from Candiota, a high ash non-coking coal from Rio Grande do Sul, were pyrolised in H2 atmosphere at a bench unit specially developed, composed by an entrained bed down flow reactor with a processing capacity of 1 kg/h of powdered coal (200 micron), it has heating temperatures up to 1173 K and pressures up to 10 MPa, a gas injector with flow control in the range 0,01-0.1 Nm/min, a coal feeder, a char collector heated at temperatures up to 673 K. condensers/separators of aqueous fraction (T=293 K) and oils fraction (T= 268 K), and chroma- tographic analysis on line of vapor products. The results show the influence of the hydrogen pressure and the reaction temperature on the yield of liquids and gases, particularly the high selectivity to methane and benzene of this type of configuration, characterized by short residence times and high heating rates. Also, the figures for the Candiota coal are comparative with those of widely used american and european coals (which have lower ash and/or higher volatile contents). The appllication of this research is a new processing technology for brazilian coals. The conceptual design of an integrated process and corresponding economic estimates are presented here.

ASSUNTO(S)

carvão - liquefação carvão - analise carvão - gaseificação

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