Towards carbon neutrality: A comprehensive study on the utilization and resource recovery of coal-based solid wastes DOI Creative Commons
Zhiguo Zhang, Xumei Cui, Cheng Gan

et al.

International Journal of Coal Science & Technology, Journal Year: 2025, Volume and Issue: 12(1)

Published: April 19, 2025

Abstract Coal-based soild wastes (CBSWs) are industrial byproducts that can be harmful to the environment. The exploitation and utilization of CBSWs offer societal advantages such as resource conservation, pollution reduction, cost-effective production. However, environmentally sustainable management remains a worldwide challenge due substantial production volume limited disposal capacity CBSWs. physicochemical properties summarized, including fly ash, coal gangue gasification slag. It also presents current global applications status resources examines market supply demand. Subsequently, paper provides an overview studies on ways utilise CBSWs, highlighting primary avenues which mainly from fields chemical materials, metallurgy agriculture. Furthermore, comparative evaluation various methods for recovery is conducted, outlining their respective disadvantages. future development recycling processes discussed. review concludes while there growing need attention in recycling, its will involve combination both large-scale treatment refinement processes. aims references insights effective environmental protection Future direction focus collaborative emphasizing high-value utilization. In addition, establish comprehensive database based on-site practices, explore solutions reduce transportation costs, improve during process.

Language: Английский

Impact of Supercritical Carbon Dioxide on Pore Structure and Gas Transport in Bituminous Coal: An Integrated Experiment and Simulation DOI Creative Commons
Kui Dong,

Zhiyu Niu,

Shaoqi Kong

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(6), P. 1200 - 1200

Published: March 7, 2025

The injection of CO2 into coal reservoirs occurs in its supercritical state (ScCO2), which significantly alters the pore structure and chemical composition coal, thereby influencing adsorption diffusion behavior methane (CH4). Understanding these changes is crucial for optimizing CH4 extraction improving sequestration efficiency. This study aims to investigate effects ScCO2 on structure, bonds, mechanisms bituminous provide insights reservoir stimulation storage. By utilizing high-pressure adsorption, low-pressure gas (LP-CO2-GA), Fourier-transform infrared spectroscopy (FTIR), reactive force field molecular dynamics (ReaxFF-MD) simulations, this examines multi-scale at nano- levels. following results were found: Pore Structure Evolution: After treatment, micropore volume increased by 19.1%, specific surface area 11.2%, while mesopore 14.4% 5.7%, respectively. Chemical Composition Changes: content aromatic structures, oxygen-containing functional groups, hydroxyl groups decreased, aliphatic structures increased. Specific included an increase (CH2)n, 2H, 1H, secondary alcohol (-C-OH) phenol (-C-O) Car-Car Car-H bonds decreased. Mechanisms Volume evolves through three distinct phases: Swelling Phase: Breakage low-energy generates new micropores. Aromatic expansion reduces intramolecular spacing but increases intermolecular spacing, causing a decrease volume. Early Dissolution Continued bond breakage volume, released partially occupy pores, converting some mesopores Later Minimal alterations occur, weakened π-π interactions van der Waals forces between layers result further expansion. Impact Diffusion: Changes directly affect migration. In early stages interaction, shrinkage mean square displacement (MSD) self-diffusion coefficient CH4. However, as reaction progresses, enhances diffusion, ultimately provides fundamental understanding how modifies transport properties, offering theoretical guidance enhanced recovery strategies.

Language: Английский

Citations

1
Carbon Dioxide (CO<sub>2</sub>) Mineralization in Solid Waste-Based Grouting Slurry: A Review DOI Open Access

Safiwu Alhaji,

Bei Gao,

Wenjie Zhu

et al.

Journal of Geoscience and Environment Protection, Journal Year: 2025, Volume and Issue: 13(01), P. 121 - 155

Published: Jan. 1, 2025

Language: Английский

Citations

0
Research on innovative PVC-steel wire mesh composite confined spontaneous combustion coal gangue concrete: Experiment and finite element analysis DOI
Hongbo Guan, Keling Wang,

Benxin Hao

et al.

Structures, Journal Year: 2025, Volume and Issue: 74, P. 108603 - 108603

Published: March 8, 2025

Language: Английский

Citations

0
Investigation of Coal-Based Solid Waste Grouting Materials for Environmental Repair DOI
Yiqian Jin,

S. H. Zhang,

Suping Peng

et al.

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112334 - 112334

Published: March 1, 2025

Language: Английский

Citations

0
Influence of carbonized fly ash on the early-age shrinkage of blended cement paste with different water-to-binder ratios DOI Creative Commons

Faliang Gao,

Zhi Ge, Shiyang Zhang

et al.

Case Studies in Construction Materials, Journal Year: 2025, Volume and Issue: unknown, P. e04607 - e04607

Published: April 1, 2025

Language: Английский

Citations

0
Towards carbon neutrality: A comprehensive study on the utilization and resource recovery of coal-based solid wastes DOI Creative Commons
Zhiguo Zhang, Xumei Cui, Cheng Gan

et al.

International Journal of Coal Science & Technology, Journal Year: 2025, Volume and Issue: 12(1)

Published: April 19, 2025

Abstract Coal-based soild wastes (CBSWs) are industrial byproducts that can be harmful to the environment. The exploitation and utilization of CBSWs offer societal advantages such as resource conservation, pollution reduction, cost-effective production. However, environmentally sustainable management remains a worldwide challenge due substantial production volume limited disposal capacity CBSWs. physicochemical properties summarized, including fly ash, coal gangue gasification slag. It also presents current global applications status resources examines market supply demand. Subsequently, paper provides an overview studies on ways utilise CBSWs, highlighting primary avenues which mainly from fields chemical materials, metallurgy agriculture. Furthermore, comparative evaluation various methods for recovery is conducted, outlining their respective disadvantages. future development recycling processes discussed. review concludes while there growing need attention in recycling, its will involve combination both large-scale treatment refinement processes. aims references insights effective environmental protection Future direction focus collaborative emphasizing high-value utilization. In addition, establish comprehensive database based on-site practices, explore solutions reduce transportation costs, improve during process.

Language: Английский

Citations

0