Possibility of electrochemical regeneration of palladium catalysts poisoned by arsenic

Journal Article · Thu Oct 20 00:00:00 EDT 1988 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6161276

Sutyagina, A A; Volchkova, I L

The authors examined the possibility of using electrochemical methods for regenerating As-poisoned palladium catalysts in sulfuric acid and alkali solutions. It was shown that arsenic adsorbed on electrochemically deposited palladium suppresses its adsorption capacity for hydrogen and its catalytic activity in electrochemical reduction of nitromethane. Anodic and cyclic anodic-cathodic polarization of poisoned Pd in H/sub 2/SO/sub 4/ and KOH solutions results in oxidation of arsenic. The influence of the composition of the electrolyte on regeneration of palladium poisoned by arsenic was determined. Regeneration of arsenic-poisoned catalysts deposited on conducting supports can be achieved by anodic polarization of the electrodes in 1 N KOH at E/sub r/ greater than or equal to 1.00 V.

• Research Organization: M. V. Lomonosov Moscow State Univ. (USSR)
• OSTI ID: 6161276
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Vol. 61:5; Other Information: Translated from Zh. Prikl. Khim.; 61: No. 5, 996-1001(May 1988)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ELECTROCATALYSTS
REGENERATION
NITROMETHANE
REDUCTION
PALLADIUM
CATALYTIC EFFECTS
ADSORPTION
ARSENIC
CHROMATOGRAPHY
DEACTIVATION
EFFICIENCY
ELECTROCHEMISTRY
ELECTRODES
HYDROGEN
OXIDATION
POTASSIUM HYDROXIDES
SORPTIVE PROPERTIES
SULFURIC ACID
ALKALI METAL COMPOUNDS
CATALYSTS
CHEMICAL EXPLOSIVES
CHEMICAL REACTIONS
CHEMISTRY
ELEMENTS
EXPLOSIVES
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
METALS
NITRO COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PLATINUM METALS
POTASSIUM COMPOUNDS
SEMIMETALS
SEPARATION PROCESSES
SORPTION
SURFACE PROPERTIES
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties