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Pyrolysis under H2 and He of Utrillas coal

par Ibarra, JoséV. JosV.;Moliner, Rafael;Miranda, JoséL. JosL.;Cypres, René
Référence Fuel, 67, 4, page (464-468)
Publication Publié, 1988-04

Article révisé par les pairs

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Résumé :

Pyrolysis and hydropyrolysis at low temperature, 600 °C, of Utrillas coal were compared to determine differences in the product composition. Pyrolysis was carried out under helium at atmospheric pressure in a horizontal fixed-bed reactor with a heating rate of 7 °C min-1, and hydropyrolysis under hydrogen (3 MPa) in a fixed-bed gas-swept reactor with a heating rate of 10 °C min-1. Gas and water yields were similar, but the gases from hydropyrolysis had higher methane and lower CO2 contents and therefore higher heating power. Tars from both techniques had similar elemental analyses but structural differences were observed by FT-i.r., 1H n.m.r. and gas chromatography. Hydropyrolysis yielded more tars than pyrolysis. The chars had analogous elemental and proximate analyses and calorific values. Hydropyrolysis was more effective for desulphurization than conventional pyrolysis. © 1988.