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Fuels to Drive Our Future (1990) / Chapter Skim
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Appendix I: Technical Data for Coal Pyrolysis
Pages 191-196

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From page 191...
... I Technical Data for Coal Pyrolysis This appendix contains tables indicating properties of products from various coal pyrolysis processes.
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From page 192...
... ~ = ~ En ~ _ ~ Cal Cal ~ ~ ~ 1 1 Via ~ i_ cat In ~ oo ~ 0 ~ ~ ~ ID CD ~ 3 :, o o 5 E 9 .E .E 9 :~ 9 9 m' ~ m I m go 8 g ~ 0 ~ ~ ~ ~ ~ O O
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From page 193...
... Slow heating favors secondary reactions of volatiles within coal particles, which results in lower overall condensible yields, more aliphatic components, a lower pitch content in the condensible product, and a composition tending to be richer in thermodynamically stable products. Fast heating favors more rapid release of tars into the gas stream, which results in higher overall condensible yields, a more highly aromatic condensible product, a higher pitch content in the tar, and a product character that tends to be determined by devolatilization kinetics.
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From page 194...
... 0.1 (maf) Elemental Analysis mof wt% Carbon 84.0 78.8 Hydrogen 8.3 7.1 Sulfur 0.74 1.7 Nitrogen 1.08 1.8 Oxygen 5.78 10.6 Hydrogen-to-carbon atomic ratio 1.18 1.07 Toluene-insolubles 1.2 18.0 Distillation Range (°F)
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From page 195...
... 195 ._ o Cat Cal Ct U, Cal o v 3 .= o ~ a)
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From page 196...
... ~ Cat C5` C~ 0 ~ ~ ~ ~ ~ a~ oo ox c~ ..= ~ ;.33 0 ~ ~ ~ V ._ U, 0 0 ~ ~ oo oo _ C~ _% o ~V _ C)
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Key Terms

  • condensible product
  • secondary reactions
  • pitch content
  • coal particles
  • slow heating

  • increasing pressure
  • yields tend
  • overall condensible
  • heating rates
  • heating favors

  • coal feed
  • highly aromatic
  • content decrease
  • reactive gases
  • particles tend

  • favors secondary
  • fast heating
  • lower pitch
  • heteroatom content
  • below devolatilization

  • thermodynamically stable
  • product yields
  • entrained bed
  • enhance condensible
  • reactor type

  • favor secondary
  • aromatic condensible
  • fluidized bed
  • inert atmosphere
  • sulfur content


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