Sulfiding behavior of iron based coal liquefaction catalyst

Ikenaga, Naoki; Taniguchi, Hideo; Watanabe, Azumi; Suzuki, Toshimitsu

doi:10.1016/s0016-2361(99)00161-1

Cited by 26 publications

(14 citation statements)

References 26 publications

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“…Ikenaga et al studied the sulfidation of iron catalysts (g-FeOOH, a-FeOOH, Fe(CO) 5 , Fe 3 (CO) 12 and natural pyrite) using XRD and XPS techniques. 245 The active phase pyrrhotite (Fe 1Àx S) is transformed from FeOOH via pyrite as an intermediate. However, the formation of a pyrite intermediate is not observed for iron carbonyl complexes.…”

Section: Dissolution Catalystsmentioning

confidence: 99%

Clean liquid fuels from direct coal liquefaction: chemistry, catalysis, technological status and challenges

Vasireddy

Morreale

Cugini

et al. 2011

Energy Environ. Sci.

344

209

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Increased demand for liquid transportation fuels coupled with gradual depletion of oil reserves and volatile petroleum prices have recently renewed interest in coal-to-liquids (CTL) technologies. Large recoverable global coal reserves can provide liquid fuels and significantly reduce dependence on oil imports. Direct coal liquefaction (DCL) converts solid coal (H/C ratio z 0.8) to liquid fuels (H/C ratio z 2) by adding hydrogen at high temperature and pressures in the presence or absence of catalyst. This review provides a comprehensive literature survey of the coal structure, chemistry and catalysis involved in direct liquefaction of coal. This report also touches briefly on the historical development and current status of DCL technologies. Key issues, challenges involved in DCL process and directions for the future research are also addressed.

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Section: Dissolution Catalystsmentioning

confidence: 99%

Clean liquid fuels from direct coal liquefaction: chemistry, catalysis, technological status and challenges

Vasireddy

Morreale

Cugini

et al. 2011

Energy Environ. Sci.

344

209

View full text Add to dashboard Cite

show abstract

“…4(a). [20][21][22][23] FeS may exist in the VD sample because the FeS peak was observed at approximately 710.4 eV. Our research group found that α-Fe is produced from limonite reduction and/or limonite reacting with NH 3 and H 2 S at 300-800°C and nitrided as Fe x N and sulfurized as FeS or Fe 1-x S. 24,25) According to this work, the peak attributable to Fe x N was not found in the XPS spectra, as seen in Fig.…”

Section: Chemical Forms Of Constituent Elements Of Thementioning

confidence: 99%

Fate of Nitrogen and Sulfur during Reduction Process of Carbon-containing Pellet Prepared by Vapor Deposition of Gaseous-Tar and the Influences of the Hetero Elements on the Reduction Behavior and Crushing Strength

2018

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“…The selectivities (%) toward the individual components on carbon basis are calculated according to the same principle [26]:…”

Section: Catalyst Testingmentioning

confidence: 99%

Spatial Heterogeneity and Imperfect Mixing in Chemical Reactions: Visualization of Density-Driven Pattern Formation

2011

Physical Chemistry

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Iron manganese oxides are prepared using a coprecipitation procedure and studied for the conversion of synthesis gas to light olefins and C 5 + hydrocarbons. In particular, the effect of a range of preparation variables such as [Fe]/[Mn] molar ratios of the precipitation solution, pH of precipitation, temperature of precipitation, and precipitate aging times was investigated in detail. The results are interpreted in terms of the structure of the active catalyst and it has been generally concluded that the calcined catalyst (at 650• C for 6 hours) containing 50%Fe/50%Mn-on molar basis which is the most active catalyst for the conversion of synthesis gas to light olefins. The effects of different promoters and supports with loading of optimum support on the catalytic performance of catalysts are also studied. It was found that the catalyst containing 50%Fe/50%Mn/5 wt.%Al 2 O 3 is an optimum-modified catalyst. The catalytic performance of optimal catalyst has been studied in operation conditions such as a range of reaction temperatures, H 2 /CO molar feed ratios and a range of total pressures. Characterization of both precursors and calcined catalysts is carried out by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), BET specific surface area and thermal analysis methods such as TGA and DSC.

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Sulfiding behavior of iron based coal liquefaction catalyst

Cited by 26 publications

References 26 publications

Clean liquid fuels from direct coal liquefaction: chemistry, catalysis, technological status and challenges

Clean liquid fuels from direct coal liquefaction: chemistry, catalysis, technological status and challenges

Fate of Nitrogen and Sulfur during Reduction Process of Carbon-containing Pellet Prepared by Vapor Deposition of Gaseous-Tar and the Influences of the Hetero Elements on the Reduction Behavior and Crushing Strength

Spatial Heterogeneity and Imperfect Mixing in Chemical Reactions: Visualization of Density-Driven Pattern Formation

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