Abstract

The performance characteristics of highly efficient cermet filters with a multilayer membrane structure used for the treatment of nitrogen, argon, helium, methane, carbon monoxide and dioxide at temperatures up to 75 K are studied. It is shown that as the temperature decreases, their collection efficiency with respect to a finely dispersed aerosol decreases. At low Reynolds numbers, the variation of the gas-flow pressure drop through the filters is determined by the gas viscosity. The multilayer nickel-based membrane structure is stable to substantial temperature gradients and can be regenerated by blowing and heating. It is found that the filter collection efficiency for liquid gases is determined by the pore size of the fine-pore selective layer of the filters according to the sieving mechanism of collecting dispersed particles.

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