Journal
13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13
Volume 114, Issue -, Pages 6087-6101Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2017.03.1746
Keywords
CO2; direct air capture; adsorbent; Toth isotherm; working capacity
Funding
- Tekes, the Finnish Funding Agency for Innovation
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In this paper, a proprietary CO2 sorbent is characterized and its sorption capacity determined. FTIR-ATR spectroscopy suggests that the sorbent is composed of polystyrene functionalized with primary amine. The Toth isotherm is found to best fit to laboratory-scale CO2 sorption data in partial pressure range of 0.1-5 mbar. Chemisorption dominates at and below atmospheric CO2 partial pressure, especially in humid conditions. Humidity promotes total CO2 capacity by 20-34%. Temperature- dependent Toth model is used to estimate working capacity in different regeneration conditions. Temperature swing adsorption or temperature-vacuum swing adsorption can be utilized in direct air capture conditions, depending on the application. Available online at www.sciencedirect.com (C) 2017 The Authors. Published by Elsevier Ltd.
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