(276c) Sub-Ambient Pressure-Swing Adsorption for Enhanced Post-Combustion Carbon Dioxide Capture Via Phase-Change Materials Application

Authors: 
Rubiera Landa, H. O., Georgia Institute of Technology
DeWitt, S. J. A., Georgia Institute of Technology
Realff, M. J., Georgia Institute of Technology
Lively, R. P., Georgia Institute of Technology
Kawajiri, Y., Georgia Institute of Technology
Sub-ambient pressure-swing adsorption for enhanced post-combustion carbon dioxide capture via phase-change materials application

Héctor Octavio Rubiera Landa, Stephen J. A. DeWitt, Matthew J. Realff, Ryan P. Lively, and Yoshiaki Kawajiri.

School of Chemical & Biomolecular Engineering, Georgia Institute of Technology,

311 Ferst Drive N. W., Atlanta, GA, 30332-0100, USA.

As a transition step towards a carbon-free society, a number of process technologies are currently being investigated and developed. Amongst these, adsorption-based separations for carbon capture and storage (CCS) offer an attractive alternative for this global challenge [1]. Critical aspects to successful implementation of adsorption-based CCS technologies for post-combustion carbon capture include the application of high-performance adsorbents, suitable for high carbon dioxide recovery from flue gas streams.

As demonstrated experimentally in [2], and analyzed via numerical simulations of breakthrough curves at sub-ambient conditions [3], the application of a phase-change material (PCM) embedded in fiber adsorbents has the potential to enhance the performance of adsorption cycles by providing suitable heat management, therefore aiming at lower plant footprint and enabling a quasi-isothermal operation with optimal adsorptive capacity usage. In combination with tailored metal-organic frameworks operating at sub-ambient conditions, wherein significant adsorption of carbon dioxide occurs, ‘PCM-assisted’ cyclic adsorption processes promise to enable higher productivity adsorption systems.

The present work discusses firstly simple ‘PCM-assisted’ modeling and numerical simulation for sub-ambient pressure-swing adsorption cycles (PSA/VPSA), whereby a smooth-interface phase-change model is applied to represent melting/freezing transitions of the PCM, occurring by the intrinsic non-isothermal, periodic process operation. Next, as preliminary step for further process optimization work, we conduct a parametric study, useful in obtaining insight into the process dynamics governing ‘PCM-assisted’ PSA/VPSA cycles.

References

[1] J. Wilcox, R. Haghpanah, J. He, K. Lee, E. Rupp. Advancing Adsorption and Membrane-Based Separation Processes for the Gigaton Carbon Capture Challenge. Annual Review of Chemical and Biomolecular Engineering 2014, 5(1), 479-505. http://dx.doi.org/10.1146/annurev-chembioeng-060713-040100.

[2] R. P. Lively, N. Bessho, D. A. Bhandari, Y. Kawajiri, W. J. Koros. Thermally moderated hollow fiber sorbent modules in rapidly cycled pressure swing adsorption mode for hydrogen purification. International Journal of Hydrogen Energy 2012, 37(20), 15227-15240. http://dx.doi.org/10.1016/j.ijhydene.2012.07.110.

 [3] H. O. Rubiera Landa, M. J. Realff, R. P. Lively, Y. Kawajiri. 2016 AIChE Annual Meeting 2016, San Francisco, CA, USA.