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- W1993490585 abstract "Abstract Mineral-catalysed transformations of 1-undecene and 1-pristene were investigated by pyrolysis-gas chromatography using a sandwich technique in which alkene samples were placed on quartz wool between plugs of catalytic material in an electrically-heated quartz tube. 1-Pristene was isomerised more rapidly than 1-undecene and the order of isomerisation activity was kaolinite > illite > spent Julia Creek oil shale > bentonite. Kaolinite was more active as an isomerisation catalyst after drying at 100° C. Coating of the kaolinite at 370° C with char from the pyrolysis of shale oil vapour reduced its activity and may explain the poor catalytic activity of mineral matter for the isomerisation of linear alkenes during oil shale pyrolysis. 1-Undecene isomerisation on clays was accompanied by the formation of methyl-decanes, undecane and cracking products at temperatures as low as 340° C. 1-Pristene isomerised to 2-pristene with extreme ease and even char-coated kaolinite rapidly catalysed the reaction at 350° C. The isomerisation of 1-pristene on active catalysts (e.g. kaolinite, 330 ° C) yielded pristane as the principal product. Clays therefore catalyse hydrogen-transfer reactions and some of the pristane found in kerogen pyrolysates may be derived from 1-pristene. Similarly, the ratio of linear alkanes/linear alkenes could in part depend upon mineral catalysed hydrogen-transfer reactions. The sandwich pyrolysis technique provides a simple and effective method for exploring thermal transformations of model compounds." @default.
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- W1993490585 date "1988-12-01" @default.
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- W1993490585 title "Mineral-catalysed transformations of terminal alkenes during pyrolysis" @default.
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- W1993490585 doi "https://doi.org/10.1016/0165-2370(88)85009-5" @default.
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