锌镁铝层状双氢氧化物对煤自燃的阻化特性

发布时间：2018-06-20 07:25

本文选题：煤自燃 + 阻化剂　；参考：《煤炭学报》2017年11期

【摘要】：煤炭自燃的发生严重影响着煤矿的安全生产,添加阻化剂是预防煤炭自燃的常用技术手段之一。采用热重/差热扫描-傅里叶红外光谱(TG/DSC-FTIR)联用技术研究了锌镁铝类水滑石(Zn_1Mg_2Al_1-CO_3-LDHs)对煤炭自燃的阻化特性和机理,测试了该阻化剂作用下,煤自燃过程中质量、特征温度、热效应和气体产生量等参数的变化规律。测试结果表明,吸热是Zn_1Mg_2Al_1-CO_3-LDHs抑制煤自燃的主要原理,煤样中阻化剂的添加能够提高煤的脱水脱附最大速率点、缓慢氧化温度和煤样的起始放热温度,而且可以降低煤样的最大释热功率,同时对煤样氧化过程中CO2的产生有轻微的促进作用,阻化率随添加量的增大呈线性增加,研究表明Zn_1Mg_2Al_1-CO_3-LDHs对煤自燃有良好的抑制作用。
[Abstract]:The occurrence of spontaneous combustion of coal seriously affects the safety of coal production. Adding inhibitor is one of the common technical means to prevent spontaneous combustion of coal. Thermogravimetric / differential thermal scanning Fourier transform infrared spectroscopy (TG-DSC-FTIR) technique was used to study the resistance characteristics and mechanism of zinc, magnesium and aluminum hydrotalcite, Zn1Mg2Al1-CO3-LDHsto the spontaneous combustion of coal. The quality and characteristic temperature of coal spontaneous combustion under the action of the blocking agent were tested. The variation of thermal effect and gas production. The test results show that heat absorption is the main principle of inhibiting spontaneous combustion of coal by ZnS _ 1mg _ 2AlL _ 1-COID _ 3-LDHs, and the addition of inhibitor in coal sample can increase the maximum rate point of dehydration and desorption of coal, slow oxidation temperature and initial exothermic temperature of coal sample. In addition, the maximum heat release power of coal sample can be reduced, and the CO _ 2 production of coal sample oxidation process can be promoted slightly, and the resistance rate increases linearly with the increase of the added amount. The research shows that Zn1Mg2Al1-CO3-LDHs has a good inhibitory effect on coal spontaneous combustion in Zn1Mg2Al1-CO3-LDHs.
【作者单位】：西安科技大学安全科学与工程学院;
【基金】：国家自然科学基金资助项目(51404192,51604218,51774233)
【分类号】：TD752.2

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