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- W1984811379 abstract "Abstract Direct methane conversion to higher hydrocarbons has been carried out on platinum loaded HX and HY zeolites by using a two-step reaction sequence. After exposure to flowing methane the samples were submitted to a flow of hydrogen, which resulted in the production of ethane, propane, n- and i-butane, n-, cyclo- and i-pentane, n-, cyclo- and other isomers of hexanes and traces of heptanes. On Pt/HX, the amount of homologated methane increased with temperature in spite of the fact that an increase of hydrogenolysia at the expense of higher alkanes took also place. The conversion, as referred to the adsorbed methane, did not vary significantly between 250 and 325 ° C (39% ). In the case of Pt/HY, the amount of homologated methane was maximum at about 275 °C and the yield decreased from 52 to 30% when the temperature increased from 250 to 325 °C. The distribution of the reaction products varied strongly with temperature and duration of the exposure to methane. Pt/HX was more active than Pt/ HY at temperatures above 250 °C, which is only partly caused by the higher methane adsorption capacity of Pt/HX. Some modifications of the Pt/zeolite samples are suggested in order to obtain higher activity." @default.
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- W1984811379 date "1993-10-01" @default.
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- W1984811379 title "Direct conversion of methane to higher alkanes by platinum loaded zeolites" @default.
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- W1984811379 doi "https://doi.org/10.1016/0926-860x(93)85099-b" @default.
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