Physicochemical analysis and kinetic study of orange bagasse at higher heating rates
Physicochemical analysis and kinetic study of orange bagasse at higher heating rates
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DOI：
10.1016/j.fuel.2020.117642
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发表时间：
2020-07-01
期刊：
影响因子：
7.4
通讯作者：
Biswas, Asit Baran
中科院分区：
文献类型：
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作者：
Bhattacharjee, Neelanjan;Biswas, Asit Baran
本文研究了橙色蔗渣在热重分析仪上以25、50、75和100℃min(-1)四种升温速率，在恒定氮气流量0.1 L min(-1)条件下的热降解行为。在蔗渣热降解的同时，还对橙渣的物化性质进行了分析，确定了橙渣的物化性质。分析结果表明，橙渣水分含量低，挥发物含量高，HHV为17.26MJ kg(-1)。其他分析手段，如FT-IR、EDX、X射线衍射仪、扫描电子显微镜和BET，也有助于研究橙色蔗渣的物理化学性质。采用KAS、Ozawa-Flynn-Wall(OFW)和Coats-Redfern三种不同的动力学模型，通过优化橙色蔗渣的热重数据，确定了表观活化能(EA)、反应级数(N)、关联值(R-2)和指前因子(A)等动力学参数。两种动力学模型KAS法和OFW法计算的橙渣的平均表观活化能分别为112.90和123.24 kJmol(-1)。实验数据与橙色蔗渣动力学模拟数据吻合较好。从以上分析和动力学研究结果可以看出，橙渣具有成为热解原料的潜力。
The present work investigates the thermal degradation behaviour of orange bagasse that was pyrolysed in a thermogravimetric analyser at four heating rates 25, 50, 75 and 100 degrees C min(-1) respectively under a constant N-2 flow rate of 0.1 L min(-1). Along with thermal degradation, the physicochemical properties of orange bagasse were determined by proximate, ultimate, compositional analysis and high heating value. The analysis results indicated that the orange bagasse has low moisture and high volatile matter content which gave a better HHV of 17.26 MJ kg(-1). Other analysis like FT-IR, EDX, XRD, SEM and BET also helped in investigating the physicochemical properties of orange bagasse. Using three different kinetic models namely Kissinger-Akahira-Sunose (KAS), Ozawa-Flynn-Wall (OFW) and Coats-Redfern the kinetic parameters like apparent activation energy (Ea) and reaction order (n), correlation values (R-2) and pre-exponential factor (A) were determined by optimising the thermogravimetric data of orange bagasse. The two kinetic models KAS and OFW methods helped in calculating the mean apparent activation energy of the orange bagasse which was 112.90 and 123.24 kJ mol(-1) respectively. The experimental data were in good agreement with the orange bagasse kinetics simulated data. From the results of the above analysis and kinetic study, it can be said that the orange bagasse has the potential to become a pyrolysis feedstock.