In this section
@article{Ferre:2026:10.1016/j.seppur.2026.138821,
author = {Ferre, A and Wedler, C and Ward, A and Burger, J and Pini, R and Petit, C},
doi = {10.1016/j.seppur.2026.138821},
journal = {Separation and Purification Technology},
title = {Co-production of high-purity carbon dioxide and methane via a single-bed pressure-vacuum swing adsorption process},
url = {http://dx.doi.org/10.1016/j.seppur.2026.138821},
volume = {406},
year = {2026}
}
TY - JOUR
AB - Pressure–vacuum swing adsorption is a promising technology to produce methane (CH) and capture carbon dioxide (CO) from biogas. Yet, processes for the simultaneous production of both heavy (CO) and light product (CH) at high-purity require several cycle steps (and, accordingly, columns) and/or multi-stage configurations. Here, we consider a simple 4-step cycle that can be implemented in a single bed and evaluate nine adsorption datasets, including zeolites, metal–organic frameworks, and activated carbon. Using a combination of equilibrium-based and detailed dynamic process models, we have carried out unconstrained purity/recovery optimizations as well as constrained optimizations considering both recovery–recovery and energy–productivity trade-offs. Zeolite NaY, zeolite 13X, and MIL-160(Al) are identified as top performers. With zeolite NaY, CO purity 95%, CO recovery 86%, CH purity 97% and CH recovery 91% are achieved. Two independent NaY datasets led to notably different recoveries (up to 10% deviation), underscoring the sensitivity of process performance to the quality of adsorption isotherm data. The equilibrium-based model reproduces adsorbent rankings of the detailed dynamic model with moderate fidelity. As such, this study extends the application of this computationally efficient first-pass screening tool to biogas applications, while also emphasizing that reproducible and harmonized adsorption data are critical for robust material screening and process design.
AU - Ferre,A
AU - Wedler,C
AU - Ward,A
AU - Burger,J
AU - Pini,R
AU - Petit,C
DO - 10.1016/j.seppur.2026.138821
PY - 2026///
SN - 1383-5866
TI - Co-production of high-purity carbon dioxide and methane via a single-bed pressure-vacuum swing adsorption process
T2 - Separation and Purification Technology
UR - http://dx.doi.org/10.1016/j.seppur.2026.138821
VL - 406
ER -