Akademik Veri Yönetim Sistemi
SEPARATION AND PURIFICATION TECHNOLOGY, cilt.390, 2026 (SCI-Expanded, Scopus)
Coal gasification slag (CGS), a by-product of the Coal Chemical industry, exhibits considerable possibility for application in areas such as low-carbon building material production and CO2 mineralization and sequestration. However, its low-carbon utilization is constrained by its low carbonated consolidation activity. In this study, the mechanical activation effect and the carbonated consolidation performance of mechanically activated CGS were explored via a suite of analytical practices, including XRD, FT-IR, TG-DTG, and SEM-EDS. The mechanism of carbonated consolidation in mechanically activated CGS was systematically elucidated. Results show that: (1) Mechanical grinding significantly influences key physicochemical properties, including specific surface, particle size distribution, full width at half maximum (FWHM) of amorphous quartz phases, diffraction peak intensities, and bonding configurations of Si-O and Si-O-Al groups. (2) When grinding duration reaches 120 min and carbonation proceeds for 24 h, the mechanical strength and CO2 uptake of the CGS carbonated consolidation achieve optimal values of 0.49 MPa and 0.75 g/kg, respectively. Its CO2 uptake increases by 83% compared to the original CGS. (3) Calcite crystals are transformed from disordered granular forms into well-crystallized platelike and blocky morphologies by grinding. (4) The polymerization degree of [SiO4] and [AlO4] tetrahedra is reduced by mechanical activation, facilitating C-(A)-S-H gel formation and calcite through the synergy of carbonation and hydration. This research advances understanding of the mechanical activation mechanism on the carbonated consolidation of CGS and provides theoretical support for its resource utilization.