不同物理参数造纸法再造烟叶纸基在闪速热解环境下的热解特性

Pyrolysis Behavior of Paper-base of Paper-making Process Reconstituted Tobacco with Different Physical Parameters under Flash Pyrolysis Conditions

为考察造纸法再造烟叶纸基物理参数改变对其热解特性的影响,利用闪速热解-红外联用(FPy-FTIR)法研究了4种不同物理参数纸基热解气相产物的形成规律,采用闪速热解结合高效液相色谱针对性地分析了热解气相产物中8种羰基化合物(甲醛、乙醛、丙酮、丙烯醛、丙醛、巴豆醛、2-丁酮和丁醛)的生成情况。结果表明:①纸基热解主要生成H2O、CO2、CO、甲醇、羰基化合物、炔烃类(主要是乙炔)、烯烃类(主要是乙烯)和烷烃类(主要是甲烷)化合物。纸基透气度的提高有利于热解释放出更多的气相产物。②透气度、定量以及烟草浆和木浆相对比例的改变并不会影响甲烷的形成,而透气度的提高会降低CO的生成量,并产生更多的CO2。③木浆相对比例的提高是导致羰基化合物和乙烯生成强度减弱的主要原因。④4种纸基闪速热解所形成的羰基化合物中都是乙醛的生成量最多,其次是丙酮和丙醛。

In order to investigate the influences of the physical parameters of the paper-base in paper-making process reconstituted tobacco on its pyrolysis behavior, the formation of pyrolyzed gas phase products of 4 paper-bases with different physical parameters were investigated by flash pyrolysis-Fourier transform infrared spectrometer （FPy-FTIR）. Moreover, the evolution of 8 carbonyl compounds （including formaldehyde, acetaldehyde, acetone, acrolein, propionaldehyde, crotonaldehyde, butanone and butyraldehyde） were analyzed by flash pyrolysis-high performance liquid chromatography （FPy-HPLC）. The results showed that： 1） The pyrolyzed gas phase products mainly included water, carbon dioxide, carbon monoxide, methanol, carbonyl compounds, alkynes （mainly acetylene）, alkenes （ethylene） and alkanes （methane） compounds. The increase of permeability of paper-base was beneficial to the formation of gas phase products. 2） The permeability, grammage and ratio of tobacco pulp to wood pulp did not affect the formation of methane, while the increase of permeability would produce less carbon monoxide but more carbon dioxide. 3） The increase of wood pulp proportion was the main reason for carbonyl compounds and ethylene reducing. 4） Aacetaldehyde was the major carbonyl compound formed from the flash pyrolysis, followed by acetone and propionaldehyde.