Pyrolysis characteristics of bio-oil fractions separated by molecular distillation
Pyrolysis characteristics of bio-oil fractions separated by molecular distillation
复制标题
分子蒸馏分离生物油馏分的热解特性
DOI：
10.1016/j.apenergy.2009.10.004
复制
发表时间：
2010-09-01
期刊：
影响因子：
11.2
通讯作者：
Cen, Kefa
中科院分区：
文献类型：
--
作者：
Guo, Xiujuan;Wang, Shurong;Cen, Kefa
采用分子蒸馏技术将生物油分离成轻馏分、中馏分和重馏分。用气相色谱-质谱仪(GC-MS)分析了三种馏分和生物油粗制品的化学成分。组分的多样性反映了生物油的复杂性和分馏的必要性。用热重分析仪结合傅里叶变换红外光谱(TG-FTIR)测定了生物油馏分的热解特性。各组分的失重与化学成分相一致。随着水、二氧化碳、碳氢化合物和醇的形成，轻组分蒸发最快。由于含有酚类和糖类，重质组分的分解速度最慢，残炭率最高，热解产物包括CO2和醇或酚类物质，除生成水和甲酸外，与中间组分相似。二氧化碳或甲烷的释放是二次反应的证据，在轻馏分和中间馏分的热解过程中，二氧化碳或甲烷的释放始于450摄氏度左右。(C)2009爱思唯尔有限公司。保留所有权利。
Molecular distillation was used to separate bio-oil into a light fraction, a middle fraction and a heavy fraction. The chemical composition of the three fractions and the crude bio-oil was analyzed by gas chromatography coupled with mass spectrometry (GC-MS). The diversity of the components reflected the complexity of the bio-oil and the necessity for fractionation. The pyrolysis characteristics of the bio-oil fractions were determined with a thermogravimetric analyzer coupled with Fourier transform infrared spectroscopy (TG-FTIR). The weight loss of components was in agreement with the chemical composition. The light fraction evaporated fastest with the formation of water, CO2, hydrocarbons and alcohols. The heavy fraction had the slowest rate of decomposition and the highest char residue yield due to the presence of phenols and saccharides, and the pyrolysis products included CO2 and alcohols or phenols, which was similar to the middle fraction except the formation of water and formic acid. The release of CO2 or methane, evidence of a secondary reaction, began at similar to 450 degrees C in the pyrolysis of the light and middle fractions. (C) 2009 Elsevier Ltd. All rights reserved.