Über katalytische Reaktionen des Cyclohexanols an aktiver Kohle

Bahr, Th.

doi:10.1002/cber.19310640868

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…Alternatively, the slow step in the temperature range 300°to 370°m ay be the diffusion of hydrogenated, solvated coal from the solid coal into the liquid phase. (2) Primary decomposition of the coal. (3) Hydrogenation of unsaturated groups in the primary decomposition products.…”

Section: Catalysis In Hydrogenolysis Of Coal and Tarmentioning

confidence: 99%

“…Craxford (9, 10) states that the only alternate to the reaction 2Co + 2CO -* Co2C + C02 (1) is 2Co + CO + H2 -Co2C + H20 (2) Since reaction 1 is too slow to account for the rate of hydrocarbon formation, reaction 2 is the main source of carbide. The mechanism suggested in the preceding paragraph is consistent with the fact that water is the main oxygenated product of the Fischer-Tropsch synthesis on cobalt catalysts.…”

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confidence: 99%

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Catalysis in Synthetic Liquid-Fuel Processes.

Storch¹

1945

Ind. Eng. Chem.

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THE main components of the Fischer-Tropsch catalysts that are active in the synthesis of normally liquid hydrocarbons from hydrogen and carbon monoxide-namely, iron, cobalt, nickel, and ruthenium-form relatively unstable carbides of nonionic crystal structures upon exposure to carbon monoxide in the temperature range of the synthesis (26). These carbides react with hydrogen below about 350°C. whereby the carbide is quantitatively converted to methane plus a few per cent of ethane (2-4). Above 350°C. there is extensive decomposition of the •carbides to carbon. It probably is significant that the optimum temperature ranges in this synthesis-185°t o 215°C. for cobalt and 240°to 320°C. for iron catalysts-are below 350°C. Re-action of the carbides with dilute acids results in the formation of normally liquid hydrocarbons (2, 2É).The reaction between carbon monoxide and cobalt or iron or their oxides to form carbides is much too slow (9, 10) to account for the rate of synthesis of hydrocarbons when a mixture of hydrogen arid carbon monoxide is used. In some fashion the presence of hydrogen catalyzes carbide production. Wagenheim (51), who studied the catalysis of the reaction 2CO -* C02 + C by iron at 350°to 500°C ., found that the formation of carbon was markedly accelerated when a little hydrogen is mixed with the carbon monoxide. There is some evidence that carbon formation proceeds by way of the metal carbide (14,16,29).

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Section: Catalysis In Hydrogenolysis Of Coal and Tarmentioning

confidence: 99%

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confidence: 99%

Catalysis in Synthetic Liquid-Fuel Processes.

Storch¹

1945

Ind. Eng. Chem.

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Die Fortschritte in der organischen Chemie 1929–1931. III. Isocyclische Reihe

Müller

1932

Angewandte Chemie

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Neuere Methoden der präparativen organischen Chemie. 17. Dehydrierungen mit Schwefel, Selen und Platinmetallen

Plattner¹

1942

Angewandte Chemie

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liihalt: Anwclldutigsl)ereich. --Die verscliiedeneii 3Iethodeii und Reagentien. -Renktionsnirclianismus. Verhnltcn funktiorieller Gruppen. -€Iytlrieruii,aseffc.kte. -Sormale Dehydrierungcii. .-Dehydrieriuigen uiiter Verandermig des Kohlenstoffskeletts. ---I'articlle Dehytlrierung. -Disproportionicrung. -. Hetcrocyclischc Verbindungen.h'ehenreaktionen. --Dic Praxis dcr Dchydrieriuigrn. --Sclilul3bctraclituii~~~ii. ir Dehytlrierung hat sich in den letzten beiden Jahrzehnten * ) Mlt dlrsem lleltrag 1st dlt! Rclhe drr ,,Nrunrra Molhotleti tlcr prapariit. organlvclien Cli:*inle" abgwehlosucii untl wlrd J d z t in t.lnvrn Ihnd. Format I

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Über katalytische Reaktionen des Cyclohexanols an aktiver Kohle

Cited by 4 publications

References 10 publications

Catalysis in Synthetic Liquid-Fuel Processes.

Catalysis in Synthetic Liquid-Fuel Processes.

Die Fortschritte in der organischen Chemie 1929–1931. III. Isocyclische Reihe

Neuere Methoden der präparativen organischen Chemie. 17. Dehydrierungen mit Schwefel, Selen und Platinmetallen

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