Inhibiting effects of a proanthocyanidins/sodium polyacrylate composite on the spontaneous combustion of long-flame coal

Inhibition Effect of Coal Spontaneous Combustion by Composite Inhibitory Foam Based on CaCl2–Melatonin Inhibitor

“…Figure shows the TG-DTG (thermogravimetric-derivative thermogravimetric) curves of the raw coal and the inhibitory coal samples, where the DTG represents the derivative TG. The TG-DTG curves of coal contained six characteristic temperature points Table lists the six characteristic temperature points ( T 1 – T 6 ) of the two coal samples, and Table presents a division of the spontaneous combustion process of the two coal samples into temperature stages based on these characteristic temperature points.…”

“…The TG-DTG curves of coal contained six characteristic temperature points. 37 Table 2 lists the six characteristic temperature points (T 1 −T 6 ) of the two coal samples, and Table 3 presents a division of the spontaneous combustion process of the two coal samples into Compared to the raw coal, the mass loss of T1 in inhibitory coal had more mass lost, and the T 1 temperature of the inhibitory coal sample was delayed by 12.9 °C, indicating that the composite inhibitory foam increased the thermal decomposition temperature of small molecular compounds and active functional groups by facilitating moisture evaporation and heat absorption. Additionally, the composite inhibitory foam can inhibit the oxidation of molecular hydrogen bonding interactions and free hydroxyl, −CH 3 /-CH 2 −, and C−O/C−O−C functional groups.…”

Study on the Inhibition Characteristics of Coal Spontaneous Combustion by Silica Gel Foam

“…Additionally, the foam component could enhance the fluidity of the gel system, thus balancing the overall performance of the new material Antioxidant inhibitor components: Antioxidants are known to scavenge free radicals, and the main function of the antioxidant component is to suppress the spontaneous combustion process of coal–oxygen, use chemical inhibitors to directly cut off the chain chemical reaction of coal–oxygen, reduce the chemical reaction heat, directly block the coal–oxygen reaction, and improve inhibition efficiency Silica nanoparticles: Silica nanoparticles modify and enhance silica gel foam.…”

“… 27 Antioxidant inhibitor components: Antioxidants are known to scavenge free radicals, and the main function of the antioxidant component is to suppress the spontaneous combustion process of coal–oxygen, use chemical inhibitors to directly cut off the chain chemical reaction of coal–oxygen, reduce the chemical reaction heat, directly block the coal–oxygen reaction, and improve inhibition efficiency. 28 Silica nanoparticles: Silica nanoparticles modify and enhance silica gel foam. They can aggregate on the foam liquid film, form a stable network structure, enhance the mechanical strength of the foam liquid film, 24 and slow down the foam liquid separation and coarsening effects, thereby improving the stability and durability of the silica gel foam.…”

“…Antioxidant inhibitor components: Antioxidants are known to scavenge free radicals, and the main function of the antioxidant component is to suppress the spontaneous combustion process of coal–oxygen, use chemical inhibitors to directly cut off the chain chemical reaction of coal–oxygen, reduce the chemical reaction heat, directly block the coal–oxygen reaction, and improve inhibition efficiency. 28 …”