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Carbon capture turned upside down: high-temperature adsorption & low-temperature desorption (HALD)

Journal Article · · Energy & Environmental Science
DOI:https://doi.org/10.1039/c5ee01690h· OSTI ID:1386057
 [1];  [1];  [2];  [1];  [2]
  1. Ghent Univ., Zwijnaarde (Belgium)
  2. Univ. of California, Berkeley, CA (United States)
Carbon capture & sequestration (CCS) could reduce CO2 emissions from large fossil-fuel power plants on the short term, but the high energy penalty of the process hinders its industrial deployment. Moreover, the utility of nanoporous materials, known to be selective for the CO2/N2 separation, is drastically reduced due to the competitive adsorption with H2O. Taking advantage of the power plant's waste heat to perform CCS while at the same time surmounting the negative effect of H2O is therefore an attractive idea. We propose an upside-down approach for CCS in nanoporous materials, high-temperature adsorption & low-temperature desorption (HALD), that exploits the temperature-dependent competitive adsorption of CO2 and H2O. First, we provide a theoretical background for this entropy-driven behavior and demonstrate under what conditions competitive adsorption can be in favor of CO2 at high temperature and in favor of H2O at low temperature. Then, molecular simulations in all-silica MFI provide a proof of concept. The International Zeolite Association database is subsequently screened for potential candidates and finally, the most promising materials are selected using a post-Pareto search algorithm. The proposed post-Pareto approach is able to select the material that shows an optimal combination of multiple criteria, such as CO2/H2O selectivity, CO2/N2 selectivity, CO2 uptake and H2O uptake. As a conclusion, this work provides new perspectives to reduce the energy requirement for CCS and to overcome the competitive adsorption of H2O.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001015
OSTI ID:
1386057
Journal Information:
Energy & Environmental Science, Journal Name: Energy & Environmental Science Journal Issue: 8 Vol. 8; ISSN EESNBY; ISSN 1754-5692
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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  • Castillo, Juan Manuel; Silvestre-Albero, Juaquin; Rodriguez-Reinoso, Francisco
  • Physical Chemistry Chemical Physics, Vol. 15, Issue 40 https://doi.org/10.1039/c3cp52910j
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