Ternary solid–liquid phase equilibrium and phase diagram for DL-malic acid+fumaric acid+water system and molecular simulation

Huang, Chunxiang; Fang, Yun; Wang, Jun; Leng, Y.X.

doi:10.1016/j.molliq.2021.116766

Cited by 3 publications

(4 citation statements)

References 36 publications

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“…Due to its high-quality acidic, corrosive, and viscosity, malic acid is expected to become a promising application in the field of preventing and controlling coal spontaneous combustion. 33,34 In summary, at present, the combustion mechanism of residual coal in goaf has been studied more maturely, and a variety of coal spontaneous combustion inhibition materials have appeared, but most of them focus on the study of free radical consumption and scavenging function; and the surface structure of coal is the main place for coal-oxygen contact. 4,10 It is of great significance to explore the chemical inhibition materials with physical sealing effect for the preparation of high-quality coal spontaneous combustion composite inhibition materials.…”

Section: Guo Et Al Developed a Composite Inhibiting Materials By Inco...mentioning

confidence: 99%

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Study on the inhibitory effect of DL‐malic acid on the phase structure and combustion characteristics of coal

Sun,

Niu,

Yang

et al. 2023

Fire and Materials

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DL‐malic acid (DMA), as a recognized antioxidant inhibitor and chelating agent in the food and chemical industries, has good application prospects in coal fire prevention and control. This paper investigates the impact of a DMA solution on the surface properties and phase structure of coal through a range of analytical techniques, including electron microscope scanning, particle size analysis, and x‐ray diffraction. The thermal behavior characteristics of DMA‐treated coal were analyzed using thermogravimetric experiments. The results show that after adding malic acid, the particle size of coal sample is reduced, the sphericity and roundness are reduced, and the pore size is increased. The hydroxyapatite and calcite components in coal were dissolved and consumed, and the calcite components were gradually depleted with the increase of DMA concentration. The flocculent structure produced by the condensation of the crushing residue and broken small particles are attached to the internal pores of coal, which reduced the coal oxygen contact sites and increases the content of the sealed solution, resulting in the increase of the thermal characteristic temperature of the coal and the inhibition of the oxidation heat generation process. DMA has obvious inhibitory effect on fresh coal and oxidized coal, and the inhibitory effect is stronger on high‐temperature oxidized coal. Therefore, DMA can be effectively applied to the prevention and control of spontaneous combustion of residual coal in goaf. The research results provide a reference for the research of coal fire prevention technology and the preparation of environmentally friendly flame retardant materials.

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Section: Guo Et Al Developed a Composite Inhibiting Materials By Inco...mentioning

confidence: 99%

“…Frequently used as a chelating agent and antioxidant, it has been extensively applied in fields such as food and chemical industries. Due to its high‐quality acidic, corrosive, and viscosity, malic acid is expected to become a promising application in the field of preventing and controlling coal spontaneous combustion 33,34 …”

Section: Introductionmentioning

confidence: 99%

Study on the inhibitory effect of DL‐malic acid on the phase structure and combustion characteristics of coal

Sun,

Niu,

Yang

et al. 2023

Fire and Materials

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“…Malic acid is a tetracarbon dicarboxylic acid, which exhibits the advantages of easy synthesis and low cost, and it is widely used in the food chemical industry. 18,19 Additionally, malic acid is often used as a chelating agent and exhibits a good chelating effect on mineral metal ions, 20,21 and thereby, the progress of coal oxidation reaction can be inhibited. Herein, electron microscopy, particle size tests, and X-ray diffraction (XRD) phase analysis were conducted to obtain macro-morphological characteristics of the coal samples.…”

Section: Introductionmentioning

confidence: 99%

“…Malic acid is a tetracarbon dicarboxylic acid, which exhibits the advantages of easy synthesis and low cost, and it is widely used in the food chemical industry 18,19 . Additionally, malic acid is often used as a chelating agent and exhibits a good chelating effect on mineral metal ions, 20,21 and thereby, the progress of coal oxidation reaction can be inhibited.…”

Section: Introductionmentioning

confidence: 99%

DL‐malic acid for inhibiting the re‐ignition of long‐flame coal and its micro‐reaction mechanism

Bu,

Niu,

Wang

et al. 2024

Asia-Pacific J Chem Eng

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To study the metal ion chelating agent (DL‐malic acid) inhibiting oxidation characteristics of residual coal in goaf, the microscopic thermal transformation characteristics of the treated coal samples were obtained using apparent morphology, infrared spectroscopy, free radical testing, and thermal analysis. The results demonstrate that after the addition of malic acid, the sphericity and roundness of the coal samples decrease, and the small fractured particles accumulate in the pores of the oxidized coal samples and, thereby, reduce the number of coal–oxygen contact sites. The addition of 10% malic acid promotes the conversion of functional groups (FG) and free radicals in pre‐oxidized coal, inhibits the catalytic effect of metal ions, generates more active sites, and increases the total heat release during the combustion process. There are strong endothermic points in the malic acid‐treated coal samples, and the free water evaporation blocked by small particles in the holes delays the initial heat release temperature of the coal samples. Pre‐oxidation can promote changes in the valence state of metal ions in coal, increase the adhesion between broken pre‐oxidized coal particles via malic acid chelation, and lose the catalytic effect of metal ions; this inhibits the process of oxidative re‐ignition of coal samples.

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Solid-liquid phase equilibrium for the hexamethylenetetramine–NH4Cl–H2O system: Solubility determination, model correlation and molecular simulation

Qiao

Chen

Han

et al. 2023

Chemical Physics Letters

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Ternary solid–liquid phase equilibrium and phase diagram for DL-malic acid+fumaric acid+water system and molecular simulation

Cited by 3 publications

References 36 publications

Study on the inhibitory effect of DL‐malic acid on the phase structure and combustion characteristics of coal

Study on the inhibitory effect of DL‐malic acid on the phase structure and combustion characteristics of coal

DL‐malic acid for inhibiting the re‐ignition of long‐flame coal and its micro‐reaction mechanism

Solid-liquid phase equilibrium for the hexamethylenetetramine–NH4Cl–H2O system: Solubility determination, model correlation and molecular simulation

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