Gas separation by pressure swing adsorption: A pore‐diffusion model for bulk separation

Abstract

An experimental and theoretical study is performed for bulk separation of gas mixture by pressure swing adsorption, a process widely used commercially for gas purification. By cycling the pressure of a bed of activated carbon between 3 and up to 500 psig (0.021 to 3.445 MPa), at the ambient temperature, a 50/50 H2/CH4 mixture is separated into two products with well over 90% purity and recovery at high throughputs. All process characteristics can be predicted by a pore‐diffusion model. A fundamental understanding of the function of each step in the cyclic process is given.

Adsorption dynamics of a layered bed PSA for H2recovery from coke oven gas

“…When the sensitivity of LDF kinetic parameters was tested within the same order of the preceding values, no significant difference between the simulated results was found in the experimental range of this study. This might be true if too low values are not used for equilibriumcontrolled separation, as revealed in some research (Yang and Doong, 1985;Liow and Kenny, 1990;Ruthven et al, 1994;Hartzog and Sircar, 1995).…”

“…As a result, a great deal of computation time is required to solve the problem. Therefore, Yang and Doong (1985) solved the equations separately in a sequential order to reduce the computation time despite lower accuracy.…”

Experimental studies of a new compact design four‐bed PSA equipment for producing oxygen

“…The quantity of the purging steam is quantified as purging ratio: P/F ϭ Quantity of the desired component in the purging stream/Quantity of the desired component in the feed stream. 6 The effect of P/F on the concentration and recovery of oxygen is shown in Figure 9. A proper value of P/F is selected on a trade-off basis between the product concentration and recovery, and 0.10 was selected for the present study.…”

Experimental study of removing trace H2S using solvent coated adsorbent for PSA

“…A larger amount is favorable for improving product purity, but product recovery will reduce. The quantity of purging gas is quantified by the purging ratio, defined as 13 :…”