Pyrolysis of lignites and brown coal catalytically depolymerized with phenol to produce anisotropic coke or light oil

Isao Mochida, Yuji Moriguchi, Yozo Korai, Hiroshi Fujitsu, Kenjiro Takeshita

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Pyrolysis of lignites and brown coal catalytically depolymerized with phenol was studied in order to design easy liquefaction or up-grading procedures effective under non-extreme conditions, where the recovery of phenol may be critical. The lignites were solubilized in pyridine very easily at low phenol/lignite ratios, but high ratios were required to induce their solubility in benzene-ethanol or THF. Although THF- and pyridine-soluble (abbreviated as THFS and PS, respectively) fractions exhibited fusibility in their single carbonization to produce grain cokes of optical isotropy, optical anisotropy can be developed by co-carbonization with petroleum pitches, suggesting that these fractions may be suitable as needle or blast furnace coke sources. The heat-treatment of PS with a hydrogen donor made it completely soluble in benzene. The recovery rates of bound phenol in the depolymerized lignite were at highest 57 and 36%, respectively, for the coking and heat-treatment processes, although the formation of alkyl phenols may occur in the heat-treatment.

Original languageEnglish
Pages (from-to)135-143
Number of pages9
JournalFuel Processing Technology
Volume7
Issue number2
DOIs
Publication statusPublished - Jan 1 1983

Fingerprint

Coal
Lignite
Phenol
Coke
Phenols
Oils
Pyrolysis
Heat treatment
Carbonization
Benzene
Pyridine
Optical anisotropy
Recovery
Coking
Petroleum
Liquefaction
Blast furnaces
Needles
Hydrogen
Ethanol

All Science Journal Classification (ASJC) codes

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

Cite this

Pyrolysis of lignites and brown coal catalytically depolymerized with phenol to produce anisotropic coke or light oil. / Mochida, Isao; Moriguchi, Yuji; Korai, Yozo; Fujitsu, Hiroshi; Takeshita, Kenjiro.

In: Fuel Processing Technology, Vol. 7, No. 2, 01.01.1983, p. 135-143.

Research output: Contribution to journalArticle

Mochida, Isao ; Moriguchi, Yuji ; Korai, Yozo ; Fujitsu, Hiroshi ; Takeshita, Kenjiro. / Pyrolysis of lignites and brown coal catalytically depolymerized with phenol to produce anisotropic coke or light oil. In: Fuel Processing Technology. 1983 ; Vol. 7, No. 2. pp. 135-143.
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