Experimental Study on the Effect of a Thermoresponsive Secundine Inhibitor on Coal Spontaneous Combustion

Cui, Chuanbo; Jiang, Shuguang; Zhang, Weiqing

doi:10.1021/acs.energyfuels.7b02814

Cited by 22 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coal is still the main fossil energy even under the general trend of carbon neutrality. − However, due to the poor thermal conductivity of coal, − it easily causes heat accumulation, which evolves coal spontaneous combustion (CSC), resulting in the waste of resources. − Therefore, it becomes highly necessary to study how the pore fissure characteristics do an impact on CSC from the perspective of structure …”

Section: Introductionmentioning

confidence: 99%

Exploring the Effect of Low-Temperature Oxidation on the Petrophysical Characteristics of Coal

Li,

Cao,

et al. 2023

ACS Omega

View full text Add to dashboard Cite

Low-temperature oxidation leads to the accumulation of heat in coal, and it is an important trigger for coal spontaneous combustion (CSC). The oxidation effects induce irreversible damage in the pore and fracture structures of coal, which provide a way for the infiltration of oxygen. In this work, the evolution of pores and cracks of coal in the progress of low-temperature oxidation is researched based on nitrogen adsorption, scanning electron microscopy (SEM), and ultrasonic testing. The results show that the oxidation effect increases microporous structures and promotes the development of mesopores and macropores in coal. Besides, as the temperature increases, the oxidation effect becomes more significant, while the pore morphology has not changed significantly yet. Meanwhile, the oxidation effect causes coal particles to block or collapse in the macropores, and the plugging degree increases with increasing temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

Exploring the Effect of Low-Temperature Oxidation on the Petrophysical Characteristics of Coal

Li,

Cao,

et al. 2023

ACS Omega

View full text Add to dashboard Cite

show abstract

“…With the loss of water, their inhibition efficiency is greatly decreased (Li et al, 2012b). In maintaining the high efficiency of inhibiting spontaneous coal combustion, the application of temperature sensitive materials as coating to allow the release of inhibitors at a specific temperature was investigated (Cui et al, 2017;Li et al, 2016a;Ma et al, 2016Ma et al, , 2017Qi et al, 2016). However, they did not consider the effect of diffusion and action range of inhibitors, and it was found that the covered area of coal was extremely limited after solid or liquid inhibitors were released.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on controlled-release inhibitor foam for restraining spontaneous combustion of coal

Zhang

Yang

Xie³

et al. 2020

Energy Exploration & Exploitation

View full text Add to dashboard Cite

A new method is proposed based on temperature-controlled self-reaction to generate and release inhibitors in the form of foam at a specific temperature, which can overcome the disadvantages of short effective time and low efficiency in the inhibition of the spontaneous combustion of coal when inhibitors are released in advance, and greatly increase the action range of inhibitor through foam diffusion. The proposed temperature-controlled foaming system was prepared with hollow spheres as solution carriers, NaHCO3 and acetic acid as basic reactants, reaction-generated CO2 as foaming gas, sodium dodecyl sulfate and sodium carboxymethyl cellulose as foaming additives, NaCl, MgCl2 and CaCl2 as additives to enhance inhibition effect, and temperature sensitive paraffin as insulating material to generate and release inhibitor foam. The effects of releasing foam on restraining the spontaneous combustion of coal were studied based on the experimental analysis of the optimum ratio of reactants and additives, hollow sphere parameters, released temperature of the foam and variation rule of CO generated by coal oxidation. The obtained results showed that the released temperature of foam was 59–61°C and the covered area of pulverized coal by inhibitor foam was 12.9–13.9 times higher than when it was directly wetted by inhibitor solution. The total effects of inhibition and inerting were achieved after pulverized coal was wetted with inhibitor foam and the efficiency of restraining the spontaneous combustion of coal reached 88.51–97.06% when temperature was increased to 160°C.

show abstract

“…The coal spontaneous combustion can only be prevented or controlled by altering the coal pile structure and external conditions, such as reducing the impacts from environment and strengthening the monitoring of cryogenic latency, through hindering the infiltration of air in the coal stockpile, evacuating the heat of the coal pile, and decreasing the temperature of the coal pile. [ 4–6 ] Research shows that reducing the oxygen circulation in coal piles is a more effective method to control spontaneous combustion of coal piles. When it has not reached the critical temperature, the coal can be rapidly cooled by physical thermal conduction.…”

Section: Introductionmentioning

confidence: 99%

Prediction of BP neural network and preliminary application for suppression of low‐temperature oxidation of coal stockpiles by pulverized coal covering

Wan

Chu

et al. 2020

Can J Chem Eng

View full text Add to dashboard Cite

We have developed a new method to suppress spontaneous combustion of coal piles by covering the surface of coal piles with pulverized coal. Experimental studies of three type of coal samples from China (YJL, CYW, and SW) with particle size ratio of 10:1 were performed to investigate the low-temperature oxidation of coal pillars. In this work, we have also demonstrated that the distributions of oxygen concentration, the temperature field, as well as the spontaneous combustion of three typical Chinese coal samples can be predicted accurately using back-propagation neural network (BPNN) by MATLAB. Pearson correlation analysis showed that temperature and oxygen concentration highly depend on the ratio of pulverized coal thickness to coal piles thickness, activation energy, void ratio, wind speed, and low-temperature oxidation time. Three-layer BPNN models with five input factors were developed to predict the low-temperature oxidation process under pulverized coal. The prediction data of BPNN are fitting better with our experimental data, which confirms that BPNN modelling can accurately predict the low temperature oxidation process of coal.

show abstract

Experimental Study on the Effect of a Thermoresponsive Secundine Inhibitor on Coal Spontaneous Combustion

Cited by 22 publications

References 24 publications

Exploring the Effect of Low-Temperature Oxidation on the Petrophysical Characteristics of Coal

Exploring the Effect of Low-Temperature Oxidation on the Petrophysical Characteristics of Coal

Experimental study on controlled-release inhibitor foam for restraining spontaneous combustion of coal

Prediction of BP neural network and preliminary application for suppression of low‐temperature oxidation of coal stockpiles by pulverized coal covering

Contact Info

Product

Resources

About