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Sustainability 2016, 8(12), 1258; doi:10.3390/su8121258

Experimental Analysis and Process Modeling of Carbon Dioxide Removal Using Tuff

1
Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
2
Interuniversity Research Center on Pollution and Environment, University of Perugia, Via G. Duranti 67, 06125 Perugia, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Francesco Asdrubali and Pietro Buzzini
Received: 30 September 2016 / Revised: 24 November 2016 / Accepted: 26 November 2016 / Published: 2 December 2016
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Abstract

Removal of carbon dioxide via selective adsorption is a key process to obtain consumer-grade natural gas from biogas and, more generally, CO2 capture and sequestration from gaseous mixtures. The aim of this work is the characterization and classification of a natural alternative to synthetic zeolites that could be used as a carbon dioxide adsorbent. Tuff particulate, easily available as a byproduct of the construction industry, was tested with different laboratory procedures to verify its suitability for CO2 removal applications. Relevant physical and adsorption properties were measured during an intensive experimental campaign. Porosity, pore size distribution, and specific surface area were obtained with mercury intrusion porosimetry. Adsorption isotherms and saturation curves were obtained using two custom experimental apparatuses. The selective adsorption was finally modeled using an original phenomenological parameterization, and a simplified simulation of the process was performed using a computational fluid dynamic approach, validated against observed data. Results show that natural zeolites represent a very promising and sustainable alternative to synthetic zeolites in pressure swing adsorption processes for CO2 removal. View Full-Text
Keywords: carbon dioxide (CO2) removal; biogas upgrading; natural zeolites; computational fluid dynamic (CFD) simulations; adsorption carbon dioxide (CO2) removal; biogas upgrading; natural zeolites; computational fluid dynamic (CFD) simulations; adsorption
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Bonamente, E.; Aquino, A.; Nicolini, A.; Cotana, F. Experimental Analysis and Process Modeling of Carbon Dioxide Removal Using Tuff. Sustainability 2016, 8, 1258.

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