Paper details

Title:

CaO-based Sorbent Regeneration by Pressure Swing Adsorption (PSA) in Cyclic Biomass SESR Processes

Author(s):

Gancedo, J., Killmer, C., Rubiera, F., Gil, M.V., Pevida, C.

Document(s):

Abstract:

Sorption-enhanced steam reforming (SESR) is a promising method for biohydrogen production, where the use of an in situ solid sorbent shifts the reaction equilibrium in favor of higher hydrogen yields. A key challenge in SESR is maintaining the stability and performance of the sorbent over multiple cycles. This study focuses on evaluating the regeneration of dolomite, used as a sorbent, through Pressure Swing Adsorption (PSA) and optimizing the operating conditions for this process within cyclic SESR systems. The objective is to improve both the energy efficiency and operational performance of the system by reducing regeneration time while preserving sorbent activity. Results show that the regeneration method has a significant impact on the dolomite structure. With PSA, the sorbent activity is sustained over more cycles. It achieves a higher residual sorption capacity compared to techniques that involve temperature fluctuations, such as Temperature Swing Adsorption (TSA), which causes greater pore volume loss and increased sintering. PSA proves to be an effective regeneration technique for SESR, using a wide pressure range. Additionally, the presence of water vapor was found to reduce the regeneration time. Overall, PSA represents a promising approach for enabling more sustainable and robust SESR systems.

Keywords:

biomass, CO₂ capture, hydrogen, reforming

Topic:

Biomass Conversion to Intermediate Bioenergy Carriers and Sustainable Biofuels

Subtopic:

Biofuels and synthetic fuels from biomass and hydrogen

Event:

33rd European Biomass Conference and Exhibition

Session:

5DO.3.4

Pages:

905 - 907

ISBN:

978-88-89407-25-7

Paper DOI:

10.5071/33rdEUBCE2025-5DO.3.4

Price:

FREE