A novel composite inhibitor based on porous mineral materials and conventional flame retardant of ammonium polyphosphate (APP) is prepared to suppress the premixed methane/air explosion. Taking advantages of gas and powder inhibitor, N₂ and the prepared composite inhibitor are combined to use. The suppression performance of N₂-composite inhibitor on methane explosion is investigated on a 20-L spherical experimental explosion apparatus and the characteristic pressure data are obtained. The combined inhibition effects of N₂ and the prepared composite inhibitor are greater than either acting alone. Thermal decomposition behavior and gaseous products of composite inhibitor are analyzed with thermogravimetric analysis and thermogravimetric-mass spectrometry, respectively. Based on physical and chemical actions, the inhibition mechanisms of N₂-composite inhibitor system are proposed. This work provides a reference to prepare high-performance gas explosion inhibitor based on the synergism of binary or multiple components.

制备了一种基于多孔矿物材料和常规阻燃剂聚磷酸铵（APP）的新型复合抑制剂，以抑制甲烷/空气爆炸的预混合。利用气体和粉末抑制剂的优点，将N ₂和制备的复合抑制剂组合使用。在20L球形实验爆炸装置上研究了N ₂复合抑制剂对甲烷爆炸的抑制性能，并获得了特征压力数据。N ₂的综合抑制作用所制备的复合抑制剂要比两者单独作用都大。分别用热重分析和热重质谱分析复合抑制剂的热分解行为和气态产物。基于理化作用，提出了N ₂复合抑制剂体系的抑制机理。这项工作为基于二元或多组分协同作用制备高性能气体爆炸抑​​制剂提供了参考。