摘要:
为探讨含磷阻化剂的作用，采用程序升温-气相色谱联用实验方法，对比分析原煤样和添加不同阻化剂的低温氧化自燃过程中的CO和C2H4的释放规律，自燃升温阶段、交叉点温度及阻化率变化规律及差异。结果表明：由于阻化剂的阻化作用，CO和C2H4出现的温度点明显滞后于原煤样，并且释放量相对原煤样较低；煤氧化的过程中的3个阶段及交叉温度点出现明显差异，并通过阻化率的计算，分析得出20%的次亚磷酸钠的阻化效果更佳，阻化率达66.6%；通过傅立叶红外光谱分析仪,从微观上说明了阻化剂对煤中活性官能团分布的影响，结果表明：随着温度的升高，次亚磷酸钠分解出的次磷酸根还原性更强，煤分子结构中的C=O更易与其反应，脂肪烃中的—CH2，—CH3与其根离子结合，从而导致脂肪烃的减少，从宏观上则表现为CO和烯烃类气体释放量的减少，是一种阻化性能较好的阻化剂。
Abstract:
In order to explore the effect of phosphating inhibitor, the experimental method was used for the application of temperature - gas chromatography. In this paper, the release laws of CO, C2H4, the temperature enhance stage, the temperature of cross pot and the resistance rate of the spontaneous combustion were compared and analyzed in the process of low temperature oxidation of the original coal samples and samples adding different inhibitors. The results show that: due to the resistance of the inhibitor, the temperature points of CO and C2H4 are obviously lagging behind the original coal samples, and the release amount is relatively low compared to the raw coal sample; in the process of coal oxidation, the three phases and cross temperature points were significantly different, and by the calculation of the resistance rate, it was concluded that 20% of the subsodium phosphatide had better resistance effect and the resistance rate was 66.6%; through the Fourier infrared spectrum analyzer, the influence of the inhibitor on the distribution of active functional groups in coal is demonstrated, that is the reducibility of hypophosphorous acid root produced from sodium hypophosphite with the increase of temperature, and C=O in the coal molecular structure is more likely to react with it, and the —CH2，—CH3 in the fat hydrocarbon, are combined with the root ion, which leads to the decrease of fat hydrocarbon; on the macro level, the reduction of CO and olefin gas emission is a good inhibitor.
下载:
