Effects of catalytic activity and solvent composition on two-stage coal liquefaction

Journal Article · Thu May 01 04:00:00 EDT 1997 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie960556o· OSTI ID:509344

Hasuo, Haruumi; Sakanishi, Kinya; Taniguchi, Hideki; Kishino, Masahiro; Mochida, Isao ^[1]

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1. Kyushu Univ., Kasuga, Fukuoka (Japan). Inst. of Advanced Material Study

Catalytic activities of NiMo supported on hollow carbon black (Ketjen Black), a commercial NiMo/alumina, and a synthetic pyrite were examined in the single- and two-state liquefaction of Wyoming subbituminous and Yallourn brown coals with tetralin or 1-methylnaphthalene. The two-stage liquefaction consisting of lower temperatures (<400 C) in the first stage and high temperatures around 450 C in the second stage was very effective for the conversion of asphaltene and preasphaltene components into oil fractions with the suppression of gas formation, providing the oil yield above 70 wt %, which was much larger than that obtained by the single stage of 450 C--60 min. The NiMo/KB catalyst exhibited a much higher activity for the production of the lighter oil fraction in the two-stage liquefaction than a commercial NiMo/Al{sub 2}O{sub 3} and a synthetic pyrite, especially when 1-methylnaphthalene of nondonor solvent was used, reflecting the higher activity of NiMo/KB catalyst for the hydrogenation of solvent as well as the coal at temperatures below 400 C in the first stage. It is noted that NiMo/KB catalyst gave a high oil yield around 60% even without any solvent in the two-stage liquefaction.

• OSTI ID: 509344
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 5 Vol. 36; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ALUMINIUM OXIDES
BROWN COAL
CARBON BLACK
CATALYSTS
CHEMICAL REACTION YIELD
MOLYBDENUM
NICKEL
ORGANIC SOLVENTS
PYRITE
SUBBITUMINOUS COAL
TSL PROCESS