Synergistic mechanisms of magnesium slag coupled with dust removal ash for CO2 sequestration via direct aqueous carbonation: High mineralization efficiency and optimization of reaction parameters

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-26 DOI:10.1016/j.conbuildmat.2024.138934

Yichao Wang, Jiao Mao, Xiaozhen Liu, Huixin Zhou, Lingwen Dai, Xuming Li, Xinqian Shu

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引用次数: 0

Abstract

Utilizing natural industrial solid waste for CO₂ capture and utilization can reduce both the environmental problems caused by industrial solid waste and greenhouse gases. Based on this idea, magnesium slag-based solid waste has great economic and environmental value as CO₂ storage and backfill material. In this study, the CO₂ mineralization capacity and efficiency of two magnesium slag-based industrial solid wastes including magnesium slag (MS) and dust removal ash (DRA) and their mixtures were studied by gas-liquid two-phase mineralization method. The as-prepared samples were characterized by a series of techniques such as XRF, XRD, SEM, FT-IR and TG tests. The results exhibited that compared with single MS and DRA sample, the mineralization efficiency of composites increased 7.63 % and 14.1 %, respectively, which performed a synergistic effect. In addition, the main operation parameters including reaction temperature, solid-to-liquid ratio and CO₂ concentration were investigated, and the temperature of 35 ℃, solid-to-liquid ratio of 0.1 g/mL and CO₂ concentration of 30 vol% were chosen as optimum operating parameters. Furthermore, the reaction mechanism of CaCO₃ formation and the mineralization efficiency improvement after cooperation were expounded.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.