Development of a dispersed iron catalyst for first stage coal liquefication

Cugini, A.V.; Krastman, D.; Lett, R.G.; Balsone, V.D.

doi:10.1016/0920-5861(94)87006-3

Cited by 29 publications

(23 citation statements)

References 4 publications

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“…Other binary or ternary combinations between Fe, Mo, Sn, Ti, Zr and Mg oxides were also surveyed for liquefaction activity, and the results emphasize the potential of synergism in multicomponent catalysts [97]. Impregnation/precipitation techniques were used to generate iron oxyhydroxide directly on the coal [101,106]. Dispersion can be enhanced by impregnating the coal particles with water-or oil-soluble catalyst precursors such as metal salts or naphthenates, acetylacetonates and carbonyls.…”

Section: Catalysis In Direct Coal Liquefaction 3031mentioning

confidence: 99%

Catalysis in Direct Coal Liquefaction

Haenel¹

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction Coal Structure Organic Structure Inorganic Structure Physical Structure Fundamental Transformations in Direct Coal Liquefaction Coal Properties Primary Liquefaction Products Solvent Catalysis in Direct Coal Liquefaction Dissolution Catalysts in the First Liquefaction Stage Supported Catalysts Dissolved Catalysts Perspectives for Direct Coal Liquefaction

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Section: Catalysis In Direct Coal Liquefaction 3031mentioning

confidence: 99%

Catalysis in Direct Coal Liquefaction

Haenel¹

2008

Handbook of Heterogeneous Catalysis

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“…The 1-L continuous reactor is a flowing gadflowing slurry (typically 200-400 g/h of slurry). These reactor systems and the product work-up procedures used in these systems have been described previously [2]. An on-line sulfiding procedure was used for sulfiding the supported catalysts for the continuous reactor system.…”

Section: Introductionmentioning

confidence: 99%

99/01924 The use of coal liquefaction catalysts for coal/oil coprocessing and heavy oil upgrading

1999

Fuel and Energy Abstracts

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This study investigates the use of supported and dispersed coal liquefaction catalysts in coal-oil coprocessing and petroleum-only systems. The focus of the study was delineating the effects of coal concentration, pressure, and catalyst type. EXPERIMENTAL Materials-The reactants used include Hondo resid (vacuum tower bottoms) and fluid catalytic cracking (FCC) decant oil. The Hondo resid was an 850' F' boiling material from a vacuum distillation tower. The FCC decant oil was a distillate product from an FCC unit and contained 36% 850°F' boiling material. Illinois No. 6 and Blind Canyon bituminous coals were used. Several unsupported catalysts were investigated including aqueous ammonium heptamolybdate (AHM), preformed MoS2 (surface area of 261 m2/g generated from aqueous AHM), Moly-Van-A, Moly-Van-L, sulfated iron oxide and FeOOH impregnated on coal [Z]. Three different supported catalysts were evaluated, two commercial NiMoly-Al203 catalysts (Akzo AO-60 and Amocat 1C) and a novel HT0:Sisupported NMo catalyst in coated form (on an Amocat y-Al203 extrudate) based on hydrous metal oxide technology developed at Sandia National Laboratories. The synthesis of ion exchangeable silica-doped hydrous titanium oxide (HTO: Si) supports and HT0:Si-supported NiMo catalysts in both bulk and coated forms has been discussed DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disdased, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

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“…It is widely believed that Fe 1-x S is an active phase for iron sulfides during coal liquefaction,[155][156][157] but in fact the formation of H . during the reactions of H 2 with FeS 2 -derived radicals such as sulfur biradicals and HS .…”

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confidence: 99%

Advances in Lignite Extraction and Conversion under Mild Conditions

Wei

Yan

et al. 2015

Energy Fuels

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Lignites are abundant coal resources, but they are low-quality fuel for direct combustion because of their high water content, high ash yield, and low calorific value. Upgrading technologies for lignites such as drying and pyrolysis have been widely investigated. Lignite conversion under mild conditions for producing ash-free coals, value-added chemicals, and/or liquid fuels also deserves attention. This paper reviews recent developments in extraction and mild conversion of lignites. The related techniques, including sequential extraction, thermal dissolution, mild oxidation, and catalytic hydroconversion of lignites, are summarized in detail. In addition, the application of high resolution mass spectrometry in determining lignite-derived products is presented. Future investigations on efficient utilization of lignites are also suggested.

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Development of a dispersed iron catalyst for first stage coal liquefication

Cited by 29 publications

References 4 publications

Catalysis in Direct Coal Liquefaction

Catalysis in Direct Coal Liquefaction

99/01924 The use of coal liquefaction catalysts for coal/oil coprocessing and heavy oil upgrading

Advances in Lignite Extraction and Conversion under Mild Conditions

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