Document Type

Conference Proceeding

Source of Publication

Materials Research Proceedings

Publication Date

1-1-2026

Abstract

A sustainable method for enhancing CO₂ capture and sequestration was developed by accelerating the carbonation of alkaline industrial wastes using carbide lime-activated biochar (BC(CLW)), an alkaline by-product of acetylene production. The biochar was produced from palm tree waste through slow pyrolysis at 400 °C, followed by activation with carbide lime slurry to enhance its alkalinity, surface basic sites, and reactivity toward CO₂. Three industrial residues, namely ladle furnace slag (LF), baghouse dust (BH), and cyclone silo dust (CD), were blended with 0, 5, 7, and 10 wt. % BC(CLW) and carbonated under ambient conditions. Characterization by thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) demonstrated that BC(CLW) substantially increased carbonate formation. TGA revealed 30 to 50 percent higher weight losses in the 400 to 850 °C range for BC(CLW) treated mixtures, corresponding to enhanced CO₂ mineralization. FTIR spectra showed intensified carbonate absorption bands, particularly in BH/BC(CLW), while SEM confirmed greater microporosity and enlarged mesopores, providing additional active sites for CO₂ adsorption and reaction. Brunauer–Emmett–Teller (BET) surface area analysis further verified a substantial increase in specific surface area and pore volume following carbide lime activation, offering quantitative evidence for the surface-area-driven enhancement in CO₂ adsorption and mineral carbonation performance. Among the tested samples, BH demonstrated the highest CO₂ capture efficiency, achieving a carbonation degree of 62% following BC(CLW) activation. This result confirms BH as the top-performing material in the study, surpassing all other tested samples in sequestration capacity. This approach integrates waste valorization with climate change mitigation, offering a scalable, low-energy pathway for permanent CO₂ storage through mineral carbonation of multiple industrial by-products.

ISBN

[9781644904169]

ISSN

2474-3941

Publisher

Materials Research Forum LLC

Volume

67

First Page

172

Last Page

179

Disciplines

Environmental Engineering

Keywords

Accelerated Carbonation, Activated Biochar, Alkaline Industrial Waste, Carbide Lime, CO₂ Sequestration, Fourier-Transform Infrared Spectroscopy, Scanning Electron Microscopy, Thermogravimetric Analysis

Scopus ID

105045752048

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Indexed in Scopus

yes

Open Access

yes

Open Access Type

Hybrid: This publication is openly available in a subscription-based journal/series

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