Development and performance study of a novel physicochemical composite inhibitor for the prevention of coal gangue spontaneous combustion

Huang, Zhian; Le, Tian; Zhang, Yinghua; Gao, Yukun; Li, Jinyang; Li, Ziyou; Ma, Zhijun

doi:10.1002/fam.2775

Cited by 13 publications

(7 citation statements)

References 20 publications

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“…33 To overcome the short inhibition life of currently available inhibitors, a novel physicochemical composite inhibitor for the prevention of coal gangue spontaneous combustion was developed by Huang et al The inhibition effect of the PAM/MMT 3%-Ca(OH) 2 20% composite inhibitor was the best in the study, with an inhibition rate of 83.15%. 34 In summary, the research on coal gangue worldwide in recent years mainly focuses on the mechanisms and characteristics of spontaneous combustion of coal gangue dumps, the detection of fire areas, and the development of treatment materials. 26,35−37 However, case studies on the spontaneous combustion of coal gangue dumps and its environmental remediation remain insufficient.…”

Section: Introductionmentioning

confidence: 99%

Detection of Spontaneous Combustion Areas of Coal Gangue Dumps and Comprehensive Governance Technologies: A Case Study

Liu,

Qi,

Luo

et al. 2023

ACS Omega

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Spontaneous combustion of coal gangue dumps not only releases toxic and harmful gases, polluting the environment, but also leads to explosion accidents and casualties due to improper handling. This paper focuses on delineating the fire area, constructing a comprehensive fire prevention and extinguishing system, and restoring the ecological environment. Infrared thermal imaging was used to detect the shallow fire area, while intensive drilling was conducted to detect the deep fire area. The stability of the coal gangue dump was enhanced by perfusing three-phase foam for cooling and using a curing material to fill the cracks. Land reclamation was then performed to restore the ecological environment. The results indicate that spontaneous combustion of coal gangue dumps can trigger the spread of the fire area from the outside to the inside, gradually expanding due to the ‘stack effect’. The sources of spontaneous combustion in gangue fire areas are mainly located 3–5 m below the flat surface, and the shallow and deep fire areas are interconnected, posing a significant danger. These research findings can serve as a reference for detecting fire areas in coal gangue dumps and controlling environmental pollution.

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Section: Introductionmentioning

confidence: 99%

Detection of Spontaneous Combustion Areas of Coal Gangue Dumps and Comprehensive Governance Technologies: A Case Study

Liu,

Qi,

Luo

et al. 2023

ACS Omega

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“…Overall, large-scale, high temperature, long duration and serious environmental pollution are relatively obvious characteristics of spontaneous combustion gangue hill [14]. Although traditional treatment methods such as grouting (Wang et al 2019), surface sealing (Zhai et al 2017) and excavation and extinguishing method (Huang et al 2019) have achieved good results, the potential thermal energy resources inside the coal gangue are wasted.…”

Section: Introductionmentioning

confidence: 99%

Ignition control and waste heat assessment of spontaneous combustion gangue hill by gravity heat pipe group: a case study in Shanxi Province, China

Zhou

Guo

Zhang

et al. 2023

Environ Sci Pollut Res

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Spontaneous combustion gangue hill has attracted great attention due to serious environmental pollution and terrible geological disasters. However, the rich thermal resources inside are often ignored. In order to control the spontaneous combustion of gangue hill and utilize the internal waste heat resources, this project studied the combined treatment effect of 821 gravity heat pipes, laid 47 sets of temperature monitoring devices, evaluated the storage of waste heat resources and proposed different waste heat utilization methods. The results show that: (1)The positions of spontaneous combustion are all located on the windward slope. The highest temperature is in the range of 6m~12m underground, exceeding 700 ℃. (2) The single-tube experiment of gravity heat pipe shows that the effective temperature control radius is 2m. The cooling effect is obvious in the range of 3m~5m underground.However, the temperature rises at the depth of 1 m underground. (3) After 90 days of treatment of the gravity heat pipe group, the temperature at the depths of 3m, 4m, 5m and 6m in the high temperature zone dropped by 56℃, 66℃, 63℃ and 42℃ respectively. The maximum temperature drop exceeds 160℃. The average temperature drop in the middle and low temperature areas is between 9°C and 21°C. (4) The concentration of harmful gases (CO, SO2 and H2S) decreases by more than 90%. The hazard level is greatly reduced. (5) The amount of waste heat resources contained within ten meters of the spontaneous combustion gangue hill is 7.83E13J. Waste heat resources can be used for indoor heating and greenhouse cultivation. And, under the temperature difference of 50 °C, 100 °C and 150 °C, the electric energy generated by the heat through the thermoelectric conversion device in the high temperature zone of the gangue hill is 4056.8 kW•h, 7468.2 kW•h and 10603 kW•h, respectively.

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“…Coal gangue is a byproduct of coal mining and processing, which is unavoidable due to limitations of the existing technical conditions, and emissions are on the rise . The accumulation and storage of coal gangue occupy a large amount of land area.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Gangue-Based X-type Zeolite Molecular Sieve as a Multiphase Fenton Catalyst and Its Catalytic Performance

Zhang

Wang

2021

ACS Omega

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In this study, a series of X-type zeolite molecular sieve catalysts, modified with copper (Cu-X), were prepared by an alkali fusion–hydrothermal synthesis using coal gangue from Inner Mongolia. These catalysts were used in the degradation of the methylene blue dye by a Fenton-like reaction. Characterization results showed that Cu is considered to be present in the surface structure of the zeolite in the form of doped Cu ions and metal oxide. It is believed that Cu2+ is the main active site involved in the Fenton reaction. The X-ray photoelectron spectroscopy (XPS) spectra indicated that Cu2+ and Cu+ coexist in the catalysts and participate together in the Fenton reaction. The degradation of methylene blue by the Cu-X catalysts was investigated to determine the optimal catalytic conditions in terms of six aspects: catalyst dosage, initial solution concentration, initial pH of the solution, H2O2 dosage, copper loading, and reaction temperature. The experimental results showed that CX-1.0 had excellent activity and stability for the degradation and decolorization of the methylene blue dye, which could completely degrade the dye within 90 min, and the total organic carbon removal rate reached as high as 97.8%. Electron spin resonance (ESR) and radical capture experiments showed that •OH played a dominant role in the Fenton-like reaction. Combined with XPS, ESR, and catalytic tests, the redox cycle of Cu+/Cu2+ was found to be accelerating the generation of reactive radicals in the Fenton system.

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Development and performance study of a novel physicochemical composite inhibitor for the prevention of coal gangue spontaneous combustion

Cited by 13 publications

References 20 publications

Detection of Spontaneous Combustion Areas of Coal Gangue Dumps and Comprehensive Governance Technologies: A Case Study

Detection of Spontaneous Combustion Areas of Coal Gangue Dumps and Comprehensive Governance Technologies: A Case Study

Ignition control and waste heat assessment of spontaneous combustion gangue hill by gravity heat pipe group: a case study in Shanxi Province, China

Preparation of a Gangue-Based X-type Zeolite Molecular Sieve as a Multiphase Fenton Catalyst and Its Catalytic Performance

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