Mass transfer approaches for CO2 separation in non-isothermal and non-adiabatic pressure swing adsorption system for biomethane upgrading

Ali, Ammar; Othman, Mohd Roslee; Helwani, Zuchra

doi:10.1016/j.fuel.2022.125642

Cited by 10 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[16,17] This model has demonstrated efficacy in dynamic adsorption modeling, offering the added advantage of computational efficiency. [18,19] Subsequently, the simplified DO model was adopted for isotherm equations in mathematical simulation, successful predicting water vapor adsorption on porous carbons. [20,21] The initial quantitative adsorption isotherm models for water by Dubinin et al [22] were further refined by Stoeckli et al [23] using the Dubinin-Astakhov equation, adept at describing type IV and V isotherms, albeit without elucidating the specific adsorption mechanisms of water vapor.…”

Section: Introductionmentioning

confidence: 99%

“…Initially, the mass transfer is described by the linear driving force (LDF) model, [14,15] which assumes that the uptake rate of the species in the particle or pellet of the porous sorbent is proportional to the difference between the equilibrium surface concentration and the average adsorbed phase concentration [16,17] . This model has demonstrated efficacy in dynamic adsorption modeling, offering the added advantage of computational efficiency [18,19] . Subsequently, the simplified DO model was adopted for isotherm equations in mathematical simulation, successful predicting water vapor adsorption on porous carbons [20,21] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heat and Mass Transfer of Water During Activated Carbon Adsorption

Tang,

Li,

Yao

2024

ChemistrySelect

View full text Add to dashboard Cite

In order to investigate the dynamic process of the heat and mass transfer phenomenon of water vapor on activated carbon, a fixed‐column adsorption unit and two kinds of activated carbon were used as adsorbent for water vapor adsorption under the adsorption temperature 293.15 K, 303.15 K and 313.15 K, respectively. A coupled model was developed by mass and energy balance, mass transfer and simplified DO adsorption equilibrium equation. The effects of physical parameters on heat and mass transfer were theoretically investigated. Results show that the numerical model match well with the experimental data (R2>0.993). The axial diffusion coefficient (DL) increases from 1.226×10−6 m2 s−1 to 4.062×10−6 m2 s−1 for RAC and 1.425×10−6 m2 s−1 to 4.030×10−6 m2 s−1 for MAC, mass transfer coefficient (k) increases from 8.171 s−1 to 27.083 s−1 for RAC and 9.499 s−1 to 26.864 s−1 for MAC. Concurrently, the breakthrough time of adsorption water vapor gradually shorten from 1000 s to 780 s with temperature increasing from 293.15 K to 313.15 K. The effect of axial diffusion coefficient (DL) on mass transfer is not obvious. Furthermore, the influence of the mass transfer coefficient (k) on temperature variation rate surpasses that of the internal heat transfer coefficient (h).

show abstract