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Dehydrogenation of ethanol to acetaldehyde

Catalysts were prepared by the incipient wetness impregnation. PdZn-alloy formation favors the oxidative dehydrogenation of ethanol to acetaldehyde rather than CH4 thereby producing H2 with high yield in the OSR at low temperatures... [Pg.93]

Oxidative Dehydrogenation of Ethanol to Acetaldehyde Nonporous Ag membranes... [Pg.137]

Fig. 15. Deactivation of Fe2(MoQ4)3 and a mechanical mixture (50 50) of Fe2(Mo04>3 + a-Sb2C>4 during the oxidative dehydrogenation of ethanol to acetaldehyde. The amount of Fe2(MoC>4)3 is identical (200 mg) in both experiments. T = 350°C ethanol/02/N2 2/1/20. Gas flow rate 50 ml/min. Fig. 15. Deactivation of Fe2(MoQ4)3 and a mechanical mixture (50 50) of Fe2(Mo04>3 + a-Sb2C>4 during the oxidative dehydrogenation of ethanol to acetaldehyde. The amount of Fe2(MoC>4)3 is identical (200 mg) in both experiments. T = 350°C ethanol/02/N2 2/1/20. Gas flow rate 50 ml/min.
The reaction of a sulfide with Raney Ni may follow two simultaneous courses as shown in eq. 13.61.129,130 The source of hydrogen may be that associated with Raney Ni or the hydrogen produced by dehydrogenation of a solvent such as ethanol.131 According to Bonner, however, dehydrogenation of ethanol to acetaldehyde and hydrogen is merely a concurrent reaction.132... [Pg.607]

Tamaru (110) also discusses examples from heterogeneous catalysis in which reaction rates of one step seem to be influenced by the adsorption of other components. For example, Nishimura et al 115) studied the dehydrogenation of ethanol to acetaldehyde and hydrogen over a specially prepared Nb/Si02 catalyst at 523 K. The studies were done in a recirculating closed (batch) reactor. The rate is about constant as time increases, and the IR spectrum of an adsorbed intermediate remains constant. A sudden evacuation of the gas-phase ethanol stops the reaction but does not affect... [Pg.366]

The vapor-phase catalytic dehydrogenation of ethanol to acetaldehyde involves the diffusion of ethanol to the catalyst surface where it reacts to produce acetaldehyde and hydrogen. Under typical reactor conditions (temperature = 548 K, pressure = 101.3 kPa) the binary diffusivities of the three binary pairs encountered are... [Pg.82]

Oxidation of Ethanol. Ethanol may be dehydrogenated or oxidized to acetaldehyde in the vapor phase with good yields. Shreve reports yields of 85-95 per cent by air oxidation of ethanol to acetaldehyde with a silver catalyst at 550°C and per-pass conversions of 50-55 per cent. Dehydrogenation of ethanol to acetaldehyde over an asbestos-supported copper catalyst activated by small additions of cobalt and chromium has been re-... [Pg.520]

It is believed that this reaction involves the following consecutive steps dehydrogenation of ethanol to acetaldehyde, condensation of acetaldehyde into acetaldol, dehydration of aldol product to crotonaldehyde, and deoxygenation of crotonaldehyde. This mechanism is illustrated here. [Pg.1729]

CiambeUi P, Sannino D, Palma P, Vaiano V, Mazzei RS. (2011) Intensification of gas-phase photoxidative dehydrogenation of ethanol to acetaldehyde by using phosphors as light carriers. Photochem. Photobiol. Sci., 10 414. [Pg.24]

Catalytic dehydrogenation of ethanol to acetaldehyde (palladium membrane)... [Pg.17]

See other pages where Dehydrogenation of ethanol to acetaldehyde is mentioned: [Pg.75]    [Pg.85]    [Pg.90]    [Pg.201]    [Pg.201]    [Pg.201]    [Pg.203]    [Pg.173]    [Pg.317]    [Pg.610]    [Pg.109]    [Pg.90]    [Pg.19]    [Pg.32]    [Pg.289]    [Pg.84]    [Pg.289]    [Pg.2097]    [Pg.703]    [Pg.2202]    [Pg.564]    [Pg.891]    [Pg.783]    [Pg.120]   
See also in sourсe #XX -- [ Pg.31 , Pg.32 ]



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