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Author: search.filters.author.Attaphaiboon, WiphadaSubject: search.filters.subject.Acetaldehyde

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    Acetaldehyde production from ethanol over Ni-based catalysts
    (2008-01-01)
    Neramittagapong, Arthit
    ;
    Attaphaiboon, Wiphada
    ;
    Neramittagapong, Sutasinee
    The aim of this work was to study the catalytic ethanol dehydrogenation to acetaldehyde over nickel based catalysts. SnO<inf>2</inf>, Al<inf>2</inf>O <inf>3</inf> and SiO<inf>2</inf> were used as supporting materials. The reactions were carried out in a catalytic flow system operated in the temperature range of 200 and 350°C under atmospheric pressure. Various parameters such as Ni loading, a kind of supporting materials, contact time on the ethanol conversion and selectivity to acetaldehyde were investigated. The main product in all cases is acetaldehyde, with secondary products such as ethyl acetate and diethyl ether. It has been found that Ni/SnO<inf>2</inf> showed the highest ethanol conversion with high selectivity to acetaldehyde. The 10 wt% Ni/SnO<inf>2</inf> exhibited the highest yield of acetaldehyde at 300°C with low contact time (0.05g min ml<sup>-1</sup>). The deactivation of 10 wt% Ni/SnO<inf>2</inf> was occurred after 200 minutes on stream due to the formation of Ni-Sn alloy phase.