Department of Chemical Engineering, Kangwon National University, 1 Joongang-ro, Samcheok, Gangwon-do 363-883, Republic of Korea.
Bioresour Technol. 2013 Jul;139:242-8. doi: 10.1016/j.biortech.2013.03.192. Epub 2013 Apr 6.
Alga Sagarssum sp. can be converted to bio-oil, gas, and char through pyrolysis. In this study, the pyrolysis characteristics and kinetics of Sagarssum sp. were investigated using a thermogravimetric analyzer and tubing reactor, respectively. Sagarssum sp. decomposed below 550°C, but the majority of materials decomposed between 200 and 350°C at heating rates of 5-20°C/min. The apparent activation energy increased from 183.53 to 505.57 kJ mol(-1) with increasing pyrolysis conversion. The kinetic parameters of Sagarssum sp. pyrolysis were determined using nonlinear least-squares regression of the experimental data, assuming second-order kinetics. The proposed lumped kinetic model represented the experimental results well and the kinetic rate constants suggested a predominant pyrolysis reaction pathway from Sagarssum sp. to bio-oil, rather than from Sagarssum sp. to gas. The kinetic rate constants indicated that the predominant reaction pathway was A (Sagarssum sp.) to B (bio-oil), rather than A (Sagarssum sp.) to C (gas; C1-C4).
马尾藻可以通过热解转化为生物油、气体和炭。在这项研究中，使用热重分析仪和管式反应器分别研究了马尾藻的热解特性和动力学。马尾藻在 550°C 以下分解，但在 5-20°C/min 的加热速率下，大部分材料在 200-350°C 之间分解。表观活化能随热解转化率的增加从 183.53 增加到 505.57 kJ/mol。使用实验数据的非线性最小二乘回归，假设二级动力学，确定了马尾藻热解的动力学参数。所提出的集总动力学模型很好地表示了实验结果，动力学速率常数表明，从马尾藻到生物油的主要热解反应途径，而不是从马尾藻到气体（C1-C4）的反应途径。动力学速率常数表明，主要反应途径是 A（马尾藻）到 B（生物油），而不是 A（马尾藻）到 C（气体）。
