초록 ▼

A method is described to remove condensible vapors in highly compressed gases without affecting the original particle spectra and concentrations. The vapors are separated from particles primarily through diffusion mechanism and collected on cold surfaces. Four important parameters are the length, th

A method is described to remove condensible vapors in highly compressed gases without affecting the original particle spectra and concentrations. The vapors are separated from particles primarily through diffusion mechanism and collected on cold surfaces. Four important parameters are the length, the flow rate, the temperature, and the diffusion coefficients of the vapors to be removed. Important applications include sampling particles from high pressure gases and condensible vapor-free filling for ultra-pure cylinder gases.

대표청구항 ▼

A process for removing condensible vapor from a compressed gas containing condensible vapors and particles without affecting the spectra or concentration of said particles in said compressed gas, said process comprising: (i) passing a starting compressed gas containing condensible vapors and particl

A process for removing condensible vapor from a compressed gas containing condensible vapors and particles without affecting the spectra or concentration of said particles in said compressed gas, said process comprising: (i) passing a starting compressed gas containing condensible vapors and particles through a flow system comprised of simple geometries and polished, clean surfaces; (ii) selecting (iia) a compressed gas flow rate through said flow system and (iib) a flow system geometry, such that particles having a diameter greater than 0.01 m5% with said flow system surfaces and condensible vapor molecules have a collision efficiency of at least 98% with said flow system surfaces; (iii) controlling the temperature of least a portion of the surfaces of said flow system to retain collided vapor molecules on said portion of the surfaces; and (iv) obtaining a product compressed gas free of condensible vapors and containing the spectra and concentration of particles of said starting compound gas.