Effect of the cerium content on the activity of Cu-Ce-Al-O catalysts in the methanol steam reforming reaction in a flow reactor
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The Cu18.5Ce x Al81.5 − x (where x = 2, 7.4, and 14) oxide catalysts were synthesized by coprecipitation and tested in the methanol steam reforming reaction in an integral flow reactor at 270°C. It was found that the activity of the catalysts increased with the calcination temperature and catalysts with intermediate cerium contents exhibited the highest activity; these catalysts exhibited the greatest values of S BET and S Cu. The phase analysis demonstrated that copper in these samples occurred almost entirely as a CuO-CeO2 solid solution. The concentration of carbon monoxide at the reactor outlet decreased with the calcination temperature. For the most active sample with a cerium content of 7.4% calcinated at 700°C, the concentration of CO reached a minimum of no higher than 0.3%.
KeywordsCerium Copper Metal Methanol Conversion Reactor Outlet Cerium Dioxide
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