活性炭官能团对其自燃性的影响研究

The influence study of activated carbon functional groups on spontaneous combustion

活性炭自燃主要受活性炭结构和环境因素的影响。在确定活性炭的粒度与外界条件相同的情况下,可通过分析活性炭结构来判断其自燃倾向性。通过对活性炭样品进行红外光谱分析和表面化学性质分析,得到活性炭官能团的类别和数量,并根据活性炭热重分析与自燃试验比较各样品的自燃倾向性。结果表明,活性炭的氧化自燃始于一些活性基团的氧化,且这些活性基团含量越大,活性炭越易自燃,说明用红外光谱分析和表面化学性质分析研究活性炭的自燃倾向性是可行的。

Activated carbon spontaneous combustion is primarily influenced by activated carbon structure and environmental factors.If particle size and surrounding conditions are certain,activated carbon structure becomes main factor influencing spontaneous combustion.Therefore,spontaneous combustion propensity can be studied through analyzing activated carbon structure.The samples are analyzed by means of FT-IR and surface chemical analysis,and then category and quantity of the functional groups are got.According to thermogravity analysis and self-ignition experiment,the different of spontaneous combustion tendency is determined.The results prove that oxidation begins from some active groups that are oxidized readily in the activated carbon.The higher the content of the active groups,the more easy is the spontaneous combustion propensity of activated carbon.So the study method above is feasible.