In situ activation of catalysts by applied electrical potentials

Details In situ activation of catalysts by applied electrical potentials In situ activation of catalysts by applied electrical potentials

1986-11-03

1988-03-08

Demers, Arthur P.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204165, 204168, 204170, 502 5, 502 20, 502514, 502522, C07C 1700, C07C 324

Patent

active

047298219

ABSTRACT:
A new method is described for the in situ activation of catalysts. Conductive catalysts or catalyst compositions are treated by applying a relatively high (up to 3,000 vdc), substantially electrostatic, potential to the catalyst while the surface of the catalyst is exposed to an ionizable gas. Activation is observed only when the catalyst is biased negatively with respect to a remote counter electrode. The activation persists even after the electrical potential is removed. This activation and, in some cases, catalyst regeneration is believed to arise from the production of cation radicals which react with and remove inactivating deposits on the catalytic surface. The process is demonstrated on the nickel-catalyzed hydrogenolysis of ehtane and ethylene.

REFERENCES:
patent: 1400959 (1921-12-01), Koetschet
patent: 3953305 (1976-04-01), Connolly
patent: 3977901 (1976-08-01), Buzzelli
patent: 4261857 (1981-04-01), Nakao
patent: 4318708 (1982-03-01), Hogberg
patent: 4401530 (1983-08-01), Clere
patent: 4499025 (1985-02-01), Davison et al.
Kristyan et al., Journal of Catalysis, vol. 101 (1986), pp. 331-341.

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