Selective synthesis of acetaldehyde applying a fuel cell system in the gas phase

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Journal of the Electrochemical Society; (USA)

DOI:https://doi.org/10.1149/1.2086887· OSTI ID:6489433

Otsuka, K; Shimizu, Y; Yamanaka, I ^[1]

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1. Dept. of Chemical Engineering, Tokyo Inst. of Technology, Ookayama, Meguro-ku, Tokyo 152 (JP)

The partial oxidation of ethylene applying a fuel cell system (C{sub 2}H{sub 4} + H{sub 2}O, Pd/silica wool disk holding H{sub 3}PO{sub 4} (aq.)/Pd or Pt, O{sub 2}) produces acetaldehyde very selectively ({gt}97%) in the gas phase. Palladium is the electrocatalyst for this selective synthesis of CH{sub 3}CHO. This method could solve a number of disadvantages of the Wacker process. The electrode prepared by hot-pressing a mixture of Pd black or Pt black with graphite and teflon powder improved the current and the rate of formation of CH{sub 3}CHO as compared to the electrode of the metal black alone. The kinetic results show that the higher the pressure of oxygen in the cathode compartment, the better for synthesis of CH{sub 3}CHO. However, the optimum pressure of C{sub 2}H{sub 4} in the anode compartment is 30 kPa. The optimum reaction temperature for the synthesis of CH{sub 3}CHO is 373 K. The applied potential across the cell enhanced the rate of formation of CH{sub 3}CHO without lowering selectivity.

• OSTI ID: 6489433
• Journal Information: Journal of the Electrochemical Society; (USA), Vol. 137:7; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
10 SYNTHETIC FUELS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACETALDEHYDE
SYNTHESIS
ETHYLENE
PARTIAL OXIDATION PROCESSES
FUEL CELLS
USES
PALLADIUM
ELECTRODES
ELECTROCHEMISTRY
HOT PRESSING
METHANE
MIXTURES
ALDEHYDES
ALKANES
ALKENES
CHEMICAL REACTIONS
CHEMISTRY
DIRECT ENERGY CONVERTERS
DISPERSIONS
ELECTROCHEMICAL CELLS
ELEMENTS
FABRICATION
HYDROCARBONS
MATERIALS WORKING
METALS
ORGANIC COMPOUNDS
PLATINUM METALS
PRESSING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
300504* - Fuel Cells- Applications
100200 - Synthetic Fuels- Production- (1990-)
300503 - Fuel Cells- Materials
Components
& Auxiliaries
400400 - Electrochemistry