Effects of feed gas concentration, temperature and process parameters on vacuum swing adsorption performance for CO2 capture

Measurements and calculations of the equilibrium adsorption amounts of CO2–N2, CO–N2, and CO2–CO mixed gases on 13X zeolite

“…(25) as a linear interpolation of the measured results when equilibrium was reached at a pressure around P a [P 1 and P 2 in Eq. (25)].…”

“…Another problem of convergent calculations of the adsorption equilibrium is the uncertainty of the converged value, especially after sudden changes in the gas pressure, which sometimes occur in actual PSA operation. In order to avoid these inconveniences, certain types of analytical formulas, including the above-mentioned EX-LM equation, are preferably used instead of the IAS model in dynamic PSA simulations [24][25][26][27]. These analytical formulas are required to possess sufficient accuracy compared to the IAS model in estimation of the adsorption equilibrium of mixed gases.…”

Experimental and Simulation Study on CO2 Adsorption Dynamics of a Zeolite 13X Column during Blowdown and Pressurization: Implications of Scaleup on CO2 Capture Vacuum Swing Adsorption Cycle

“…Zeolite 13X is a commercial synthetic adsorbent owning an excellent adsorption capacity of CO 2 even in its very low concentration range and it also has a decent selectivity of CO 2 over N 2. Hence, a number of adsorptive carbon capture processes have been designed and evaluated with zeolite 13X, ,− and the zeolite 13X process was taken as a reference case for evaluating new adsorptive capture processes designed with emerging porous materials. , In the past works, however, they designed, simulated or experimented various CO 2 capture adsorption processes at lab scales, with the column lengths ranging 0.2 to 1.0 m at most, not addressing what would happen to the designed process when it was scaled up for commercialization.…”

Modelling, simulation and optimisation of gas separation processes using Pressure/Vacuum Swing Adsorption (P/VSA) for efficient post-combustion carbon dioxide capture

“…Zeolite 13X beads appears to have large pore dimensions to limit mass transfer resistances, thermal stability, mechanical stability, and recyclability. The diffusion of CO2 in commercial zeolite 13X beads appears to be macropore controlled (Ling et al, 2015). The parameters of the dual-site Langmuir adsorption isotherm and the isosteric heats of adsorption of CO2 and N2 on zeolite 13X have been adopted from the work of Ko et al, (2005) and are summarized in Table 5.1.…”

“…It should be noted that the performance of a P/VSA process is not only determined by the adsorbent employed for the separation but also affected by the process engineering design. The most challenging process engineering design is the decision of a cycle configuration and operating conditions (Ling et al, 2015). Evidently, further work must be done to explore in detail the effect of other process variables including the duration of operating steps and overall cycle time, adsorbent bed geometry, more complex cycle configurations, etc.…”