CO2 adsorption at intermediate and low temperature by geopolymer-hydrotalcite composites
Geopolymer-hydrotalcites composites have been prepared and compared to explore their use in the field of CO2 adsorption for a wide range of working temperatures and relative applications. Two commercial hydrotalcites, with different Mg:Al ratio, were tested as fillers for a geopolymer matrix up to t...
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doaj-1dc0e8ba018449e5ba141b21d36a8da42021-04-24T05:58:38ZengElsevierOpen Ceramics2666-53952021-03-015100048CO2 adsorption at intermediate and low temperature by geopolymer-hydrotalcite compositesE. Papa0E. Landi1A. Natali Murri2F. Miccio3A. Vaccari4V. Medri5ISTEC-CNR, Institute of Science and Technology for Ceramics, 48018, Faenza, Ravenna, ItalyISTEC-CNR, Institute of Science and Technology for Ceramics, 48018, Faenza, Ravenna, ItalyISTEC-CNR, Institute of Science and Technology for Ceramics, 48018, Faenza, Ravenna, ItalyISTEC-CNR, Institute of Science and Technology for Ceramics, 48018, Faenza, Ravenna, ItalyISTEC-CNR, Institute of Science and Technology for Ceramics, 48018, Faenza, Ravenna, Italy; “Toso Montanari” Department of Industrial Chemistry, University of Bologna, 40100, Bologna, ItalyISTEC-CNR, Institute of Science and Technology for Ceramics, 48018, Faenza, Ravenna, Italy; Corresponding author.Geopolymer-hydrotalcites composites have been prepared and compared to explore their use in the field of CO2 adsorption for a wide range of working temperatures and relative applications. Two commercial hydrotalcites, with different Mg:Al ratio, were tested as fillers for a geopolymer matrix up to the maximum of 37 wt%. A high compressive strength (25–27 MPa) was retained in composites at 500 °C, which is the temperature of hydrotalcites transformation into amorphous mixed solid oxides able to adsorb CO2. Composites were characterized in term of working capacity by testing the CO2 adsorption at low (35 °C) and intermediate (200 °C) temperature, with cycles of adsorption/desorption and regeneration at 500 °C. At 35 °C, CO2 physisorption capacity was between 0.079 and 0.154 mmol g−1, while at 200 °C, the total CO2 capacity value was between 0.114 and 0.141 mmol g−1.http://www.sciencedirect.com/science/article/pii/S2666539520300481GeopolymerHydrotalciteCO2 adsorptionCompositePhysisorptionChemisorption |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
E. Papa E. Landi A. Natali Murri F. Miccio A. Vaccari V. Medri |
spellingShingle |
E. Papa E. Landi A. Natali Murri F. Miccio A. Vaccari V. Medri CO2 adsorption at intermediate and low temperature by geopolymer-hydrotalcite composites Open Ceramics Geopolymer Hydrotalcite CO2 adsorption Composite Physisorption Chemisorption |
author_facet |
E. Papa E. Landi A. Natali Murri F. Miccio A. Vaccari V. Medri |
author_sort |
E. Papa |
title |
CO2 adsorption at intermediate and low temperature by geopolymer-hydrotalcite composites |
title_short |
CO2 adsorption at intermediate and low temperature by geopolymer-hydrotalcite composites |
title_full |
CO2 adsorption at intermediate and low temperature by geopolymer-hydrotalcite composites |
title_fullStr |
CO2 adsorption at intermediate and low temperature by geopolymer-hydrotalcite composites |
title_full_unstemmed |
CO2 adsorption at intermediate and low temperature by geopolymer-hydrotalcite composites |
title_sort |
co2 adsorption at intermediate and low temperature by geopolymer-hydrotalcite composites |
publisher |
Elsevier |
series |
Open Ceramics |
issn |
2666-5395 |
publishDate |
2021-03-01 |
description |
Geopolymer-hydrotalcites composites have been prepared and compared to explore their use in the field of CO2 adsorption for a wide range of working temperatures and relative applications. Two commercial hydrotalcites, with different Mg:Al ratio, were tested as fillers for a geopolymer matrix up to the maximum of 37 wt%. A high compressive strength (25–27 MPa) was retained in composites at 500 °C, which is the temperature of hydrotalcites transformation into amorphous mixed solid oxides able to adsorb CO2. Composites were characterized in term of working capacity by testing the CO2 adsorption at low (35 °C) and intermediate (200 °C) temperature, with cycles of adsorption/desorption and regeneration at 500 °C. At 35 °C, CO2 physisorption capacity was between 0.079 and 0.154 mmol g−1, while at 200 °C, the total CO2 capacity value was between 0.114 and 0.141 mmol g−1. |
topic |
Geopolymer Hydrotalcite CO2 adsorption Composite Physisorption Chemisorption |
url |
http://www.sciencedirect.com/science/article/pii/S2666539520300481 |
work_keys_str_mv |
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