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- W190631316 abstract "Cu-containing non-etoichiometric spinel-type (NSS) catalysts can be obtained by calcination of coprecipitated precursors having a high Cr- or Al-content, with the formation also of CuO for high copper contents. In all cases, the Al-containing samples exhibit a higher surface area and a lower pore volume than those with chromium. TPR tests reveal the formation of stable Cu2+ions up to a Cu/Cu+Zn ratio of 0.5 and 0.2 for Cr- and Al-containing samples, respectively. These ions may be identified as Cu2+ ions present in the spinel-type phase or strongly interacting with it. However, the Al-containing catalysts exhibit a lower catalytic activity than that of the corresponding Cr-catalysts, and, furthermore, a higher tendency towards hydrocarbon formation, which increases as temperature and the copper content increase, and which is favoured by reaction gas mixtures richer in hydrogen and not containing CO2." @default.
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- W190631316 date "1994-01-01" @default.
- W190631316 modified "2023-10-11" @default.
- W190631316 title "Preparation, Properties and Catalytic Activity in the Methanol Synthesis of Spinel-Type Catalysts" @default.
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- W190631316 doi "https://doi.org/10.1016/s0167-2991(08)63892-6" @default.
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