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<p>A new type of modified zirconium phosphate (MZrP) inhibitor was synthesized by isooctylamine intercalation, and its inhibition effects were evaluated. SEM, EDS, and BET analyses revealed that MZrP was uniformly dispersed on the coal surface and within its internal pore structure, forming a dense layer. This layer significantly reduced the specific surface area, pore volume, and pore size, while enhancing its physical inhibition of oxygenation and moisture retention. TG-DTG and ESR analyses demonstrated that the critical temperature and maximum heat loss rate temperature of the inhibited coal samples were 9.6&#xa0;°C and 21.9&#xa0;°C higher than those of the raw coal, respectively. Additionally, the mass loss and free radical concentration of the inhibited samples were consistently lower than those of the raw coal. The thermal decomposition of MZrP into phosphoric acid and its derivatives further enhanced its chemical inhibition by deactivating free radicals. Temperature-programmed experiments showed that the gas production concentrations of the inhibited coal samples were lower than those of the raw coal, while the cross-point temperature increasing by 20.6&#xa0;°C. The inhibition rate exhibited a decreasing, increasing and decreasing trend with the incremental increase in coal temperature, with an average inhibition rate of 63.9%. Furthermore, MZrP demonstrated strong adaptability in bituminous coal and anthracite, achieving 54.8% and 50.5% inhibition efficiency, respectively, reflecting its wide application potential.</p>

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Effects of intercalated modified zirconium phosphate on the low-temperature oxidation behavior, free radical generation, pore structure, and thermodynamic properties of coal

  • 期刊论文

  • 发表日期：

    2026年2月3日

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  • Baolong Guo,
  • Yuntao Liang,
  • Gang Zhou,
  • Shuanglin Song,
  • Zhenglong He,
  • Guansheng Qi,
  • Fuchao Tian

摘要

A new type of modified zirconium phosphate (MZrP) inhibitor was synthesized by isooctylamine intercalation, and its inhibition effects were evaluated. SEM, EDS, and BET analyses revealed that MZrP was uniformly dispersed on the coal surface and within its internal pore structure, forming a dense layer. This layer significantly reduced the specific surface area, pore volume, and pore size, while enhancing its physical inhibition of oxygenation and moisture retention. TG-DTG and ESR analyses demonstrated that the critical temperature and maximum heat loss rate temperature of the inhibited coal samples were 9.6 °C and 21.9 °C higher than those of the raw coal, respectively. Additionally, the mass loss and free radical concentration of the inhibited samples were consistently lower than those of the raw coal. The thermal decomposition of MZrP into phosphoric acid and its derivatives further enhanced its chemical inhibition by deactivating free radicals. Temperature-programmed experiments showed that the gas production concentrations of the inhibited coal samples were lower than those of the raw coal, while the cross-point temperature increasing by 20.6 °C. The inhibition rate exhibited a decreasing, increasing and decreasing trend with the incremental increase in coal temperature, with an average inhibition rate of 63.9%. Furthermore, MZrP demonstrated strong adaptability in bituminous coal and anthracite, achieving 54.8% and 50.5% inhibition efficiency, respectively, reflecting its wide application potential.