Study on the synergistic mechanism and high-efficiency inhibition of lignosulfonate-based composite gel for coal spontaneous combustion
Year: 2025
Type: article
Abstract: Ensuring green and safe mining of coal resources remains a critical challenge in China, particularly due to the issue of coal spontaneous combustion (CSC). To address this, this study developed a lignosulfonate based composite gel with CSC inhibition and air leakage plugging functions. The non-toxic and environmentally friendly gel system includes lignosulfonate, polyacrylamide, modified nano-SiO 2 , DL-malic acid, and epigallocatechin gallate. Comprehensive characterizations and performance optimization were conducted. The gel maintained excellent inhibition properties over a wide temperature range. Synergy of DL-malic acid and EGCG contributed to the high inhibition performance. The inhibition mechanism of lignosulfonate-based gel was elucidated. The LS/PAM/SiO 2 -EGCG/MA gel exhibited a maximum plugging capacity of 1.56 kPa and increased the activation energy of raw coal by 42.41%, reaching 49.73 kJ/mol. Furthermore, the gel achieved an average inhibition rate of 72.80% in the temperature range of 100-200°C, effectively reducing CO emissions and environmental impact. This study provides a promising solution for green and safe coal mining, with significant implications for environmental protection and resource conservation.
Language: English
Subfield: Ocean Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,620
Funders: National Natural Science Foundation of China, Shandong University of Science and Technology, Natural Science Foundation of Shandong Province, Hunan University of Science and Technology, State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology
OpenAlex ID: W4415898184