化工学报2012，Vol.63Issue(11)：3730-3735,6.DOI:10.3969/j.issn.0438-1157.2012.11.051
活化温度对活性炭自燃危险性的影响
Influence of activation temperature on spontaneous ignition behavior of activated carbon
摘要
Abstract
The article reveals the spontaneous ignition characteristic of activated carbon (AC) as well as its key influencing factors in order to avoid or reduce the spontaneous ignition risk of AC in the process of storage and transportation. The AC samples were successfully prepared with cottonwood powder as carbon precursor and zinc chloride as activated agent at temperature from 300℃ to 700℃ , and the variation of spontaneous ignition temperature with the activation temperature was also investigated. The microstructure and surface functional groups of AC samples were characterized by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectra and the thermostability was studied by simultaneous thermal analyzer (STA). The results show that activation temperature has a great influence on the spontaneous ignition temperature of AC samples. Spontaneous ignition becomes easier if decreasing the activation temperature, which is attributed to the gradual increase of the quantities or varieties of surface functional groups of AC. It is also confirmed that the DSC and TG curves of the AC samples tend to shift to the high-temperature region with the activation temperature increasing. In other words, a higher activation temperature in the preparation process is beneficial to reduce the spontaneous ignition risk of AC.关键词
活性炭/活化温度/自燃温度/表面官能团Key words
activated carbon/ activation temperature/ spontaneous ignition temperature/ surface functional group分类
资源环境引用本文复制引用
张宏哲,王宁,王亚琴,费轶..活化温度对活性炭自燃危险性的影响[J].化工学报,2012,63(11):3730-3735,6.基金项目
国家重点基础研究发展计划项目(2010CB735510). （2010CB735510）
