Enhanced CO 2 Sequestration in Recycled Aggregates: Exploring Novel Capture-Promoting Additives

David Bastos (), Ricardo Infante Gomes, Diogo Gonçalves, Catarina Brazão Farinha (), Cinthia Maia Pederneiras, Rosário Veiga, António Santos Silva, José Alexandre Bogas and Rui Galhano dos Santos ()
Additional contact information
David Bastos: c5Lab—Sustainable Construction Materials Association, Edifício Central Park, Rua Central Park 6, 2795-242 Linda-a-Velha, Portugal
Ricardo Infante Gomes: LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal
Diogo Gonçalves: CERENA, Chemical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
Catarina Brazão Farinha: LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal
Cinthia Maia Pederneiras: LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal
Rosário Veiga: LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal
António Santos Silva: LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal
José Alexandre Bogas: CERIS, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais 1, 1049-00 Lisbon, Portugal
Rui Galhano dos Santos: CERENA, Chemical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal

Waste, 2025, vol. 3, issue 2, 1-15

Abstract: CO 2 emissions, a significant contributor to climate change, have spurred the exploration of sustainable solutions. One putative solution involves using recycled aggregates (RAs) from construction and demolition waste (CDW) to substitute natural sand in construction materials. This not only extends the life cycle of the waste but also reduces the use of natural resources. The potential to capture CO 2 in RAs presents a promising route to mitigate the environmental impact of the construction industry and contribute to its much anticipated decarbonization. This research takes a unique approach by investigating the incorporation of an amine-based additive—specifically 2-amino-2-methyl-1,3-propanediol (AMPD)—to enhance CO 2 capture into a real-case RA from recycling plants, transforming CDW with low carbon-capture potential into a highly reactive CO 2 capture material. Through TG analysis, FTIR-ATR and the combination of both (TG-FTIR), we were able to validate the use of RA materials as a support medium and quantify the CO 2 capture potential (12%) of the AMPD amine; a dual valorization was achieved: new value was added to low-quality CDW and we enhanced CO 2 sequestration, offering hope for a more sustainable future.

Keywords: AMPD amine; CDW; recycled aggregates; CO 2 capture; amine impregnation; TG-FTIR (search for similar items in EconPapers)
JEL-codes: Q1 Q16 Q18 Q2 Q20 Q23 Q24 Q25 Q28 Q3 Q31 Q38 Q5 (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:gam:jwaste:v:3:y:2025:i:2:p:17-:d:1666183

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