Composition of liquid products from catalytic hydrotreatment of flash pyrolysis tars. 1. Trickle-bed reactor products

Peter F. Nelson*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The compositions of the oils obtained by catalytic hydrotreatment in a trickle-bed reactor of flash pyrolysis tars from three Australian low-rank coals (Millmerran, Loy Yang and Yallourn) were determined by high-resolution g.c. and g.c.-m.s. The trickle-bed reactor had two stages, with sulphided steel wool and a commercial sulphided NiMo-γ-Al2O3 catalysts. Comparison of the g.c. data for oils from the three coals with distillation results showed that 70-85 % of the material was detected by g.c. The major components of the oils were substituted cyclohexanes and tetralins, alkylbenzenes and n-alkanes (C6 to C36). The effect of processing temperature in the range 367-420 °C was determined for Millmerran subbituminous coal. Apart from an increase in the volatility of the product, the composition of the components detected by g.c. did not change markedly with processing temperature. Some shift to aromatics from their hydrogenated counterparts was detected at higher temperatures.

Original languageEnglish
Pages (from-to)86-93
Number of pages8
JournalFuel
Volume67
Issue number1
DOIs
Publication statusPublished - 1988
Externally publishedYes

Keywords

  • catalytic hydrotreatment
  • coal pyrolysis
  • tar
  • trickle-bed reactor

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