A comprehensive kinetics study of coconut shell waste pyrolysis
A comprehensive kinetics study of coconut shell waste pyrolysis
复制标题
DOI：
10.1016/j.biortech.2017.03.089
复制
发表时间：
2017-07-01
影响因子：
11.4
通讯作者：
Naebulharam, Raed
中科院分区：
文献类型：
--
作者：
Ali, Imtiaz;Bahaitham, Haitham;Naebulharam, Raed
比较了无模型和模型拟合法对椰壳废料热解转化的影响。由微分法和积分等转化率法估算的表观活化能随热解转化率的增加而增大。反应模型为f(α)=(1-α)(4)。[-ln(1-α)](0.53)，表明椰壳废料的固相热解受有序成核和生长机制的控制。活性热解区由重叠的多组分降解峰组成。用基辛格方法估算的假组分的平均活化能为21.9kJ。摩尔(1)，106.4 kJ。摩尔(1)和108.6 kJ。Mol(1)分别为脱水、拟纤维素和拟半纤维素的降解。拟木质素在较宽的温度范围内分解，与拟半纤维素和拟纤维素相比，其转化率较慢。用无模型和模型拟合法相结合的方法估算了拟木质素的平均活化能范围为79.1kJ-226.5 kJ。摩尔(1)。(C)2017爱思唯尔有限公司。保留所有权利。
Model-free and model-fitting methodswere compared for pyrolytic conversion of the coconut shell waste. The apparent activation energy, estimated from differential and integral iso-conversional methods, increased with the progression of pyrolytic conversion. The reaction model, f (alpha) = (1-alpha)(4) . [-ln(1-alpha)](0.53), indicate that order-based nucleation and growth mechanisms control the solid-state pyrolysis of the coconut shell waste. The active pyrolysis zone was consisted of overlapping multicomponent degradation peaks. Average activation energy of the pseudo-components estimated from the Kissinger's method were 21.9 kJ. mol (1), 106.4 kJ. mol (1) and 108.6 kJ. mol (1) for the dehydration, the degradation of pseudo-cellulose and pseudo-hemicellulose, respectively. Pseudo-lignin decomposed over a wide range of temperature with a slower conversion rate as compared to pseudo-hemicellulose and pseudo-cellulose. Average activation energy range of pseudo-lignin was estimated from the combination of model-free and model-fitting methods as 79.1-226.5 kJ. mol (1). (C) 2017 Elsevier Ltd. All rights reserved.