| 大豆油催化热解动力学分析 |
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| 引用本文： | 林小羽,周永红,徐俊明.大豆油催化热解动力学分析[J].林产化学与工业,2012,32(4):15-20. |
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| 作者姓名： | 林小羽 周永红 徐俊明 |
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| 作者单位： | 中国林业科学研究院林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局林产化学工程重点开放实验室;江苏省生物质能源与材料重点实验室,江苏南京210042 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 为了优化油脂类热解工艺,测量了大豆油催化热解的热重及差示扫描量热曲线,催化剂为碳酸钠、α型氧化铝及γ型氧化铝,反应温度由室温升至600℃。曲线表明催化剂的加入改变了热解反应的历程。利用不同升温速率(5、10和20 K/min)的热重数据,采用Vyazovkin算法计算了反应的活化能。活化能计算结果与DSC、DTG曲线的变化趋势相一致;大豆油的热解起始活化能为204.33 kJ/mol,碳酸钠、α型氧化铝、γ型氧化铝可将起始活化能分别降至137.3、98.455和182.06 kJ/mol,但随反应的进行,催化热解的活化能会逐步升高。依据活化能计算结果预测了等温裂解反应时间,温度的升高能有效降低反应时间,接近转化终点所用反应时间由6 h以上缩短至40 min以内。反应时间的计算结果表明催化剂的加入可以使反应较为温和的进行。
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| 关 键 词： | 大豆油 热重分析 碳酸钠 氧化铝 活化能 model-free |
Catalytic Pyrolysis Kinetics Analysis of Soybean Oil |
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| LIN Xiao-yu
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ZHOU Yong-hong
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XU Jun-ming.Catalytic Pyrolysis Kinetics Analysis of Soybean Oil[J].Chemistry & Industry of Forest Products,2012,32(4):15-20. |
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| Authors: | LIN Xiao-yu ZHOU Yong-hong XU Jun-ming |
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| Institution: | (Institute Chemical Industry of Forest Products,CAF;National Engineering Lab.for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering,SFA;Key Lab.of Biomass Energy and Material,Jiangsu Province,Nanjing 210042,China) |
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| Abstract: | Thermo gravimetry(TG) and differential scanning calorimetry(DSC) analysis of soybean oil pyrolysis was performed from room temperature to 600 ℃.It indicated the decomposition mechanism was changed by adding sodium carbonate and alumina as catalysts.Vyazovkin approach is applied to calculate the activation energy by TG curves with different heating rates(5,10,20 K/min).The tendency of the calculated results is consistent with DTG and DSC curves.The required reaction time for isothermal condition is estimated based on the activation energy.It suggested that the reaction rates of the violent pyrolysis might be decreased with sodium carbonate and γ-alumina catalysts. |
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| Keywords: | soybean oil thermo gravimetry analysis sodium carbonate alumina activation energy model-free |
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