Fang Chunqi, Jiang Xuguang, Lv Guojun, Yan Jianhua, Deng Xiaobing
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
Waste Manag. 2018 Aug;78:553-558. doi: 10.1016/j.wasman.2018.06.028. Epub 2018 Jun 23.
Chrome-tanned leather shavings (CTLS) are a type of solid waste generated from the leather industry. In this study, the pyrolysis and combustion of CTLS in nitrogen and air, respectively, were investigated using a thermogravimetric analyser coupled with Fourier transform infrared spectroscopy (TG-FTIR). A heating rate of 20 °C min was applied, with a final temperature of 1000 °C. The pyrolysis process can be subdivided into three stages (drying the sample, fast thermal decomposition and a further cracking process), whereas the combustion process can be subdivided into four temperature stages. The TG/DTG curves for pyrolysis and combustion were similar at lower temperatures. Multiple peaks were observed for combustion in the temperature range of 250 °C to 580 °C. The emissions of CO, NH, HCN, HNCO, CO, acid and hydrocarbon were identified in CTLS pyrolysis. Similar gaseous products of combustion were found at lower temperatures, whereas CO is the dominant product of combustion at higher temperatures. Combustion was found to be better for disposal of CTLS than pyrolysis.
铬鞣革屑（CTLS）是皮革工业产生的一种固体废物。在本研究中，分别使用热重分析仪与傅里叶变换红外光谱仪联用（TG-FTIR）研究了CTLS在氮气和空气中的热解和燃烧。升温速率为20℃/min，最终温度为1000℃。热解过程可细分为三个阶段（样品干燥、快速热分解和进一步裂解过程），而燃烧过程可细分为四个温度阶段。热解和燃烧的TG/DTG曲线在较低温度下相似。在250℃至580℃的温度范围内燃烧观察到多个峰。在CTLS热解过程中鉴定出了CO、NH、HCN、HNCO、CO、酸和烃类的排放。在较低温度下发现了类似的燃烧气态产物，而在较高温度下CO是燃烧的主要产物。结果表明，燃烧处理CTLS比热解更好。
