Three‐bed PVSA process for high‐purity O₂ generation from ambient air

Adsorption breakthrough dynamics of zeolites for ethylene recovery from fluid catalytic cracking fuel-gas

“…This phenomenon is attributed to the displacement of the weakly adsorbed (or lighter) components by more strongly adsorbed (or heavier) components [11,14,15,20]. However, the difference in the sorption rate or the steric hindrance by pre-sorbed adsorbates in the pore mouth also contributes to the sorption dynamics and roll-up in the kinetic-driven separation process [21][22][23][24].…”

“…It was reported that a VSA process using silver nitrate impregnated clay adsorbent could adequately separate C 2 H 4 from an C 2 H 4 /C 2 H 6 mixture [2]. If fuel-gas can be supplied to the adsorption process, the pressure vacuum swing adsorption (PVSA) process can improve the separation efficiency without any additional compression energy [13,14]. Moreover, when the adsorbed component is strongly adsorbed, hot inert gas is often supplied to the adsorptive process (temperature swing adsorption; TSA) even though this increases the consumption of thermal energy [15].…”

Thermodynamic study of LiNaKLSX zeolites with different Li exchange rate for N2/O2 separation process

“…For some applications such as in steel, paper and pulp industries, glass-melting furnaces and also chemical processes such as biological treatment of wastewater, the required oxygen purity is typically 90-93%. There are, also however, great demands for high purity oxygen, for example in the fields of plasma chemistry, ozone generation or medicine [1]. During the last decade, environmental directives have been imposed to control the amount of NO x released, this requires a drastic reduction in the nitrogen level in oxygen.…”

H2 PSA purifier for CO removal from hydrogen mixtures

“…The product end of the column is kept closed and the vacuum is pulled through the feed end. In pressure vacuum swing adsorption i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 7 ( 2 0 1 2 ) 1 8 1 7 5 e1 8 1 8 6 (PVSA), which involves swinging pressure between high pressure and vacuum, the loss of the weakly adsorbed components (H 2 ) is normally less than the corresponding loss in the purge [2,21].…”