Multi-stage coking for more tar and formed coke of higher strength. 4. Formed coking of residues extracted from heat-treated single coals with a mixed solvent of N-methylpyrrolidinone and carbon disulphide

Isao Mochida, Naoki Motoshima, Hisashi Nakagawara, Yozo Korai

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A mixed solvent of N-methylpyrrolidinone and carbon disulphide (MP-CS2) was found to extract very large amounts of tarry substance from bituminous coals of C% above 80% and the residue provided a high mechanical strength of its formed coke. However, coals of C% below 80% exhibited rather low solubility and the formed cokes from their residues were not strong enough. The preheat-treatment at 450 °C under 1 MPa nitrogen pressure increased significantly the extract yield and tensile strength of the formed cokes from the residues especially with coals of C% below 80%. The origins of coking properties of the coal are briefly discussed based on the present particular results obtained by MP-CS2 extraction.

Original languageEnglish
Pages (from-to)529-532
Number of pages4
JournalFuel
Volume70
Issue number4
DOIs
Publication statusPublished - Apr 1991

All Science Journal Classification (ASJC) codes

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

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