通过 TG-FTIR 分析技术对低硫石油焦和甘蔗渣进行 CO2 共气化。
CO2 co-gasification of lower sulphur petroleum coke and sugar cane bagasse via TG-FTIR analysis technique.
机构信息
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
出版信息
Bioresour Technol. 2013 May;136:595-603. doi: 10.1016/j.biortech.2013.02.112. Epub 2013 Mar 7.
This study investigates the non-isothermal mechanism and kinetic behaviour of gasification of a lower sulphur petroleum coke, sugar cane bagasse and blends under carbon dioxide atmosphere conditions using the thermogravimetric analyser (TGA). The gas products were measured online with coupled Fourier transform infrared spectroscopy (FTIR). The achieved results explored that the sugar cane bagasse and blend gasification happened in two steps: at (<500 °C) the volatiles are released, and at (>700 °C) char gasification occurred, whereas the lower sulphur petroleum coke presented only one char gasification stage at (>800 °C). Significant interactions were observed in the whole process. Some solid-state mechanisms were studied by the Coats-Redfern method in order to observe the mechanisms responsible for the gasification of samples. The results show that the chemical first order reaction is the best responsible mechanism for whole process. The main released gases are CO2, CO, CH4, HCOOH, C6H5OH and CH3COOH.
本研究使用热重分析仪（TGA）在二氧化碳气氛条件下研究了低硫石油焦、甘蔗渣及其混合物的非等温热解机制和动力学行为。在线使用傅里叶变换红外光谱（FTIR）测量了气体产物。研究结果表明，甘蔗渣和混合物的气化发生在两个阶段：在(<500°C)释放挥发物，在(>700°C)发生炭气化，而低硫石油焦仅在(>800°C)呈现一个炭气化阶段。在整个过程中观察到了显著的相互作用。通过 Coats-Redfern 方法研究了一些固态机制，以观察样品气化的负责机制。结果表明，化学一级反应是整个过程的最佳负责机制。主要释放的气体是 CO2、CO、CH4、HCOOH、C6H5OH 和 CH3COOH。
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