Effects of Catalytic Activity and Solvent Composition on Two-Stage Coal Liquefaction
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- 作者：Haru-umi Hasuo ; Kinya Sakanishi ; Hideki Taniguchi ; Masahiro Kishino ; and Isao Mochida
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：1997
- 出版时间：May 1997
- 年：1997
- 卷：36
- 期：5
- 页码：1453 - 1457
- 全文大小：121K
- 年卷期：v.36,no.5(May 1997)
- ISSN：1520-5045
文摘
Catalytic activities of NiMo supported on hollow carbon black(Ketjen Black), a commercial NiMo/alumina, and a synthetic pyrite were examined in the single- andtwo-stage liquefaction ofWyoming subbituminous and Yallourn brown coals with tetralin or1-methylnaphthalene. Thetwo-stage liquefaction consisting of lower temperatures (<400 
C) inthe first stage and hightemperatures around 450 C in the second stage was very effective forthe conversion ofasphaltene and preasphaltene components into oil fractions with thesuppression of gas formation,providing the oil yield above 70 wt %, which was much larger than thatobtained by the singlestage of 450 C-60 min. The NiMo/KB catalyst exhibited a muchhigher activity for theproduction of the lighter oil fraction in the two-stage liquefactionthan a commercial NiMo/Al2O3 and a synthetic pyrite, especially when1-metylnaphthalene of nondonor solvent was used,reflecting the higher activity of NiMo/KB catalyst for thehydrogenation of solvent as well asthe coal at temperatures below 400 C in the first stage. It isnoted that NiMo/KB catalystgave a high oil yield around 60% even without any solvent in thetwo-stage liquefaction.
C) inthe first stage and hightemperatures around 450 C in the second stage was very effective forthe conversion ofasphaltene and preasphaltene components into oil fractions with thesuppression of gas formation,providing the oil yield above 70 wt %, which was much larger than thatobtained by the singlestage of 450 C-60 min. The NiMo/KB catalyst exhibited a muchhigher activity for theproduction of the lighter oil fraction in the two-stage liquefactionthan a commercial NiMo/Al2O3 and a synthetic pyrite, especially when1-metylnaphthalene of nondonor solvent was used,reflecting the higher activity of NiMo/KB catalyst for thehydrogenation of solvent as well asthe coal at temperatures below 400 C in the first stage. It isnoted that NiMo/KB catalystgave a high oil yield around 60% even without any solvent in thetwo-stage liquefaction.