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Coal Hydrogenation an overview ScienceDirect Topics

Because oxygen removal from the coal occurs in parallel with solubilization, it was concluded that scission of other type C– O bond is the primary chemical reaction in either solubilization or liquefaction of sub-bituminous coal. The nature of the organic material in coal indicates that a reaction medium having a polar-organic character should be best able to penetrate the coal. Alcohols and

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Solubilization of coal with hydrogen sulfide and carbon

Solubilization of coal with hydrogen sulfide and carbon monoxide. Full Record ; Other Related Research; Abstract. Conversion of coal to products soluble in common solvents and conversion of coal tar to products of lower molecular weight, effected in liquid or fused reaction medium using a hydrogenating reactant, are carried out employing hydrogen sulfide and carbon monoxide as the sole

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Solubilization of Coal SpringerLink

Cite this chapter as: Olcay A. (1988) Solubilization of Coal. In: Yürüm Y. (eds) New Trends in Coal Science. NATO ASI Series (Series C: Mathematical and Physical Sciences), vol 244.

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Solubilization and reaction of coal and like carbonaceous

Solubilization and reaction of coal and like carbonaceous feedstocks to hydrocarbons and apparatus therefor . United States Patent 4050904 . Abstract: Apparatus for effecting an hydrogenation of e.g. bituminous coal in dissolved state in molten inorganic salts with active hydrogen derived in situ from dissociated steam and recovery of hydrocarbon vapor products sequentially evolved throughout

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US4235699A Solubilization of coal with hydrogen sulfide

Solubilization of coal with hydrogen sulfide and carbon monoxide Download PDF Info Publication number US4235699A. US4235699A US06/017,514 US1751479A US4235699A US 4235699 A US4235699 A US 4235699A US 1751479 A US1751479 A US 1751479A US 4235699 A US4235699 A US 4235699A Authority US United States Prior art keywords coal hydrogen sulfide carbon monoxide

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Solubilization and reaction of coal and like carbonaceous

Solubilization and reaction of coal and like carbonaceous feedstocks to hydrocarbons and apparatus therefor

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Solubilization of coal with hydrogen sulfide and carbon

Solubilization of coal with hydrogen sulfide and carbon monoxide. Full Record ; Other Related Research; Abstract. Conversion of coal to products soluble in common solvents and conversion of coal tar to products of lower molecular weight, effected in liquid or fused reaction medium using a hydrogenating reactant, are carried out employing hydrogen sulfide and carbon monoxide as the sole

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Part I. Coal hydrogenation via bonding of metallic

OSTI.GOV Technical Report: Part I. Coal hydrogenation via bonding of metallic compounds to coal; Part II. Solubilization of Illinois bituminous coal the critical importance of

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US4050904A Solubilization and reaction of coal and like

Apparatus for effecting an hydrogenation of e.g. bituminous coal in dissolved state in molten inorganic salts with active hydrogen derived in situ from dissociated steam and recovery of hydrocarbon vapor products sequentially evolved throughout the reaction zone by progressively stripping later evolved vapors with earlier evolved vapors passed differentially through the reaction stream.

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US4235699A Solubilization of coal with hydrogen sulfide

Solubilization of coal with hydrogen sulfide and carbon monoxide Download PDF Info Publication number US4235699A. US4235699A US06/017,514 US1751479A US4235699A US 4235699 A US4235699 A US 4235699A US 1751479 A US1751479 A US 1751479A US 4235699 A US4235699 A US 4235699A Authority US United States Prior art keywords coal hydrogen sulfide carbon monoxide

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THE ROLE OF HYDROXYL AND CARBOXYL GROUPS OF COAL IN

01/01/1991 Since the hydrogenation and alkylation of coal represent the fundamental transformations in coal solubilization chemistry, the disadvantageous effect of the preliminary reductive methylation of coal on its solubilization can be attributed to derivatization of hydroxyl and carboxyl groups.

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Solubilization and reaction of coal and like carbonaceous

Solubilization and reaction of coal and like carbonaceous feedstocks to hydrocarbons and apparatus therefor . United States Patent 4050904 . Abstract: Apparatus for effecting an hydrogenation of e.g. bituminous coal in dissolved state in molten inorganic salts with active hydrogen derived in situ from dissociated steam and recovery of hydrocarbon vapor products sequentially evolved throughout

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Solubilization of coal with olefins ScienceDirect

01/05/1981 In this communication are reported the preliminary results from the treat- ment of coal with olefins under relatively mild conditions and the usefulness of olefins for coal solubilization. Taiheiyo coal (C, 77.0; H, 6.0; O, 15.5; N, 1.4; S, 0.1 wt.%, daf and ash, 10.7 wt.%) and Yubarishinko coal (C, 86.6; H, 5.9; O, 5.2; N, 2.0; S, 0.3 wt.%, daf and ash, 5.6 wt.%) were used for the present

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Coal solubilization. Factors governing successful

Coal solubilization. Promotion of the C-alkylation reaction by n-butyllithium and potassium tert-butoxide. Promotion of the C-alkylation reaction by n-butyllithium and

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Effect of chemical pretreatment on coal solubilization by

01/07/1993 Chemical pretreatment including reduction with metallic potassium (K-THF-isopropanol), reductive methylation (K-THF-CH3I), decarboxylation, reduction

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Solubilization of lignite with superacid

01/11/1995 This suggests that TFMS plays a more important role to accelerate alkylation and hydrogenation of coal molecules in the Taiheiyo coal solubilization. Hydroxyl groups were less and O,es, was more in the T-I-68 than those of original Taiheiyo coal, and total oxygen content of T-I-68 was almost the same as that of original Taiheiyo coal, indicating that hydroxyl groups were converted into

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US4050904A Solubilization and reaction of coal and like

Apparatus for effecting an hydrogenation of e.g. bituminous coal in dissolved state in molten inorganic salts with active hydrogen derived in situ from dissociated steam and recovery of hydrocarbon vapor products sequentially evolved throughout the reaction zone by progressively stripping later evolved vapors with earlier evolved vapors passed differentially through the reaction stream.

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US4235699A Solubilization of coal with hydrogen sulfide

Solubilization of coal with hydrogen sulfide and carbon monoxide Download PDF Info Publication number US4235699A. US4235699A US06/017,514 US1751479A US4235699A US 4235699 A US4235699 A US 4235699A US 1751479 A US1751479 A US 1751479A US 4235699 A US4235699 A US 4235699A Authority US United States Prior art keywords coal hydrogen sulfide carbon monoxide

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Solubilization and reaction of coal and like carbonaceous

Solubilization and reaction of coal and like carbonaceous feedstocks to hydrocarbons and apparatus therefor . United States Patent 4050904 . Abstract: Apparatus for effecting an hydrogenation of e.g. bituminous coal in dissolved state in molten inorganic salts with active hydrogen derived in situ from dissociated steam and recovery of hydrocarbon vapor products sequentially evolved throughout

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Solubilization of coal with olefins ScienceDirect

01/05/1981 In this communication are reported the preliminary results from the treat- ment of coal with olefins under relatively mild conditions and the usefulness of olefins for coal solubilization. Taiheiyo coal (C, 77.0; H, 6.0; O, 15.5; N, 1.4; S, 0.1 wt.%, daf and ash, 10.7 wt.%) and Yubarishinko coal (C, 86.6; H, 5.9; O, 5.2; N, 2.0; S, 0.3 wt.%, daf and ash, 5.6 wt.%) were used for the present

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US3966582A Solubilization and reaction of coal and like

US3966582A US05/512,538 US51253874A US3966582A US 3966582 A US3966582 A US 3966582A US 51253874 A US51253874 A US 51253874A US 3966582 A US3966582 A

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Coal solubilization. Factors governing successful

Coal solubilization. Promotion of the C-alkylation reaction by n-butyllithium and potassium tert-butoxide. Promotion of the C-alkylation reaction by n-butyllithium and potassium tert-butoxide. Energy & Fuels 1990,4 (3),242-248.

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Solubilization of lignite with superacid

01/11/1995 This suggests that TFMS plays a more important role to accelerate alkylation and hydrogenation of coal molecules in the Taiheiyo coal solubilization. Hydroxyl groups were less and O,es, was more in the T-I-68 than those of original Taiheiyo coal, and total oxygen content of T-I-68 was almost the same as that of original Taiheiyo coal, indicating that hydroxyl groups were converted into

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Preliminary oxidation effect on the conversion of coal in

01/05/1988 INTRODUCTION The solubilization of coal by methanol/NaOH treatment [1-14] is a very complex process. Several types of reaction take part in the transformation of coal into liquid and soluble products. Besides the hydrogenation, the hydroly- sis of ether bonds resulting in the molecular size reduction is of the greatest importance. In our earlier work on the effect of temperature on the results

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Coal solubilization. Promotion of the C-alkylation

01/05/1990 Solubilization of Mesocarbon Microbeads by Potassium- or Dibutylzinc-Promoted Butylation and Structural Analysis of the Butylated Products. Energy & Fuels 1997,11 (2),433-438.

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Analyses of mild hydrogenation products of coals treated

Coal-derived liquid, from Japanese Taiheiyo coal, obtained under mild hydrogenation was analysed to elucidate the chemical structure of parent coal. The n-hexane soluble neutral part was

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