Pitch and coke combustion in a circulating fluidized bed

C. M.H. Brereton, C. J. Lim, J. R. Grace, A. Luckos, J. Zhu

Research output: Journal PublicationArticlepeer-review

34 Citations (Scopus)

Abstract

Combustion tests were carried out with two hydrocarbon processing residues: a high-volatile pitch from a hydrotreating process and a green petroleum coke. It was demonstrated that both fuels can be treated successfully by circulating fluidized bed combustion, with sulfur capture by limestone addition. Levels of calcium sulfide in the baghouse ash were acceptable in both cases, and were especially low for the pitch. The presence of vanadium pentoxide in the residues from pitch burning appears to have caused significant conversion of SO2 to SO3, Limestone addition led to an increase in NOx emissions for the pitch, but to a decrease for the coke, probably because of the low volatile matter of the latter, such that limestone catalysis of NOx reduction by CO predominated over catalysis of N2O production from fuel volatile nitrogen. N2O levels were higher for the coke than for the pitch or other fuels investigated.

Original languageEnglish
Pages (from-to)1415-1423
Number of pages9
JournalFuel
Volume74
Issue number10
DOIs
Publication statusPublished - Oct 1995
Externally publishedYes

Keywords

  • fluidized bed combustion
  • petroleum residues
  • pollution control

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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