1. Mineral CO₂ Sequestration in Industrial Waste Materials : a comparative study using FTIR, TGA and calcimetrySara Tominc, Majda Pavlin, Maruša Mrak, Vilma Ducman, Ognjen Lj. Rudić, Cyrill Vallazza-Grengg, 2026, published scientific conference contribution Abstract: Mineral CO2 sequestration is a promising approach for reducing greenhouse gas emissions by storing CO2 in stable forms permanently. This process involves capturing CO2 and converting it into solid carbonates through mineralisation. Waste ashes and slags, by-products of waste incineration and steel production, are promising materials for CO2 sequestration, due to their high alkalinity and reactive mineral phases. In this study, the CO2 sequestration potentials of different metallurgical slags and incineration ashes from Austria and Slovenia were analysed using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and calcimetry. Biomass ash (A1) showed the highest sequestration capacity of 153.7 g CO2 per kg of ash.
Keywords: CO2 sequestration capacity, enhanced carbonation, thermogravimetric analysis, calcimetry, Fourier transform infrared spectroscopy
Published in DiRROS: 15.05.2026; Views: 475; Downloads: 388
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2. Dataset for the conference paper Mineral CO2 sequestration in industrial waste materials: a comparative study using FTIR, TGA and calcimetrySara Tominc, Majda Pavlin, Maruša Mrak, Vilma Ducman, Ognjen Lj. Rudić, Cyrill Grengg, 2025, research data Abstract: The dataset supports the data presented in the tables and figures of the conference paper "Mineral CO2 sequestration in industrial waste materials: a comparative study using FTIR, TGA and calcimetry" (https://doi.org/10.18690/um.fkkt.1.2026.8). It includes masses before and after carbonation treatment, calcimetric measurements, XRF, TGA, FTIR and XRD analysis data, as well as calculations of CO2 uptake and CO2 sequestration capacity for the analysed samples.
Keywords: alkali-activated materials, biomass ash, carbonation, artificial aggregates, alkalijsko aktivirani materiali, biomasni pepel, karbonatizacija, umetni aggregati
Published in DiRROS: 04.12.2025; Views: 544; Downloads: 200
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3. Aggregates obtained by alkali activation of fly ash : the effect of granulation, pelletization methods and curing regimesOgnjen Lj. Rudić, Vilma Ducman, Mirjana Malešev, Vlastimir Radonjanin, Suzana Draganić, Slobodan Šupić, Miroslava Radeka, 2019, original scientific article Abstract: This paper presents results regarding the phase composition, microstructure and textural properties of two types of aggregates, which were prepared via crushing or pelletization of alkali-activated Class F fly ash and cured under different conditions. The alkali activator was the same for aggregate products, containing an alkaline solution consisting of 8 M NaOH and Na-silicate (8 M NaOH/Na-silicate = 1:2.5 mass ratio). The aforementioned properties were influenced by two different preparation procedures combined with varying curing regimes (under normal conditions at 20 %C, RH 40%60% for 28 and 120 days and under an accelerated regime, at 65 %C for 5 days). Aggregates were characterized using X-ray diffraction (XRD), Fourier-transform transmission infrared spectroscopy (FTIR), back scattered electron microscopy with energy dispersive spectrometer (BSE-EDS) analyses and mercury intrusion porosimetry (MIP). The results showed noteworthy structural and textural diversities between the two types of aggregate. The method of preparation and curing regime affected the formation of the N-A-S-H structure and the texture of the alkali-activated fly ash product, with the crushing method giving an advantage
Keywords: alkali activation, agregat, FTIR
Published in DiRROS: 14.09.2023; Views: 1685; Downloads: 1169
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