Iron-based catalysts supported on carbon nanoparticles of hollow structure for coal liquefaction
- Kyushu Univ., Kasuga, Fukuoka (Japan). Inst. of Advanced Material Study
Recent studies have shown that NiMo catalysts supported on carbon nanoparticles (Ketjen Black: KB) are very effective for the conversion of low-rank coals to oil; however, because of the high cost of Mo, lower cost alternative metals are desired. This study describes the preparation and use of iron-based catalysts having performances very similar to those or NiMo/KB-based catalysts. The iron-based catalysts were prepared by impregnating soluble iron salts onto KB. Coal liquefaction studies were conducted at 450 C, 60 min, 15 MPa H{sub 2} pressure, using solvent (tetralin)/coal/catalyst weight ratios of 1.5/1/0.03. Of the various iron salts investigated, catalysts prepared from iron(II) fumarate (Fe 15 wt % supported on KB) gave the highest oil yield (60%) in the liquefaction of Tanitoharum coal. This yield was similar to that obtained in experiments using 12 times as much Fe in the form of synthetic iron pyrite but was still less effective than the NiMo/KB catalyst. Using 3 times as much Fe fumarate/KB catalyst increased the oil yield to ca. 70% which was comparable to that achieved by NiMo/KB catalyst. Addition of Mo (2 wt %) or Ni (10 wt %) to the Fe/KB catalyst increased the oil yield to ca. 70% with the same weight of catalyst. Comparisons of the hydrogenation and hydrocracking activities of Fe-based KB catalysts and NiMo/KB catalysts for the conversion of coal macromolecules are discussed.
- OSTI ID:
- 452279
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 36, Issue 2; Other Information: PBD: Feb 1997
- Country of Publication:
- United States
- Language:
- English
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