Solvent-Free Shear Mixing vs. Wet Impregnation: Evaluation of Class I Polyamine-based Sorbents for CO2 Capture

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63598758" target="_blank" >RIV/70883521:28610/25:63598758 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Solvent-Free Shear Mixing vs. Wet Impregnation: Evaluation of Class I Polyamine-based Sorbents for CO2 Capture

Original language description

Amine-functionalized solid adsorbents are key materials for CO2 capture, but their practical deployment is often constrained by energy-intensive, solvent-based and time-consuming preparation methods.This study addresses that challenge by evaluating a solvent-free high-speed shear mixing (DRY) method for preparing amine-loaded adsorbents using ZEOFREE® 600, a commercially available calcium silicate. Three polyamines, branched polyethylenimine (PEI), pentaethylenehexamine (PEHA), and tetraethylenepentamine (TEPA), were impregnated at 30-60 wt% loadings and compared with samples prepared via conventional WET impregnation.Results indicated that the DRY method yielded comparable or superior performance across multiple criteria, including morphological stability, textural properties, amine accessibility, thermal resistance, and cyclic durability, while eliminating the need for solvents and prolonged drying and requiring significantly less energy and processing time.Under simulated flue gas conditions (10% CO2), maximum adsorption capacities reached 3.52 mmol·g-1 for TEPA60_DRY, 3.44 mmol·g-1 for PEHA60_DRY, and 3.19 mmol·g-1 for PEI60_DRY. TEPA and PEHA based adsorbents exhibited superior uptake capacity, while PEI-based adsorbents provided enhanced thermal and cyclic stability. These findings demonstrate the suitability of ZEOFREE® 600 as a support and confirm the DRY method as a time and energy-efficient alternative for producing CO2 sorbents.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů