@article{Ferre:2026,
author = {Ferre, A and Wedler, C and Ward, A and Burger, J and Pini, R and Petit, C},
journal = {Separation and Purification Technology},
title = {Co-production of high-purity carbon dioxide and methane via a single-bed pressure-vacuum swing adsorption process},
year = {2026}
}

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TY  - JOUR
AB  - Pressure–vacuum swing adsorption is a promising technology to produce methane (CH4) and capture carbon dioxide (CO2) from biogas. Yet, processes for the simultaneous production of both heavy (CO2) and light product (CH4) 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, CO2 purity >95%, CO2 recovery >86%, CH4 purity >97% and CH4 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 materialscreening and process design.
AU  - Ferre,A
AU  - Wedler,C
AU  - Ward,A
AU  - Burger,J
AU  - Pini,R
AU  - Petit,C
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
ER  - 

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