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1、第37卷第6期中南林业科技大学学报Vol.37No.62017年6月JournalofCentralSouthUniversityofForestry&TechnologyJun.2017Doi:10.14067/j.cnki.1673-923x.2017.06.017http://qks.csuft.edu.cn马尾松木质素快速热解及产物分析郭忠,蒋新元,廖媛媛,张敏,黄一磊(中南林业科技大学材料科学与工程学院,湖南长沙410004)摘要:以针叶材马尾松木质素(Pinusmassoniana)为快速热解的原料,
2、采用热解-气相色谱-质谱联用(Py-GC-MS)技术,分别对磨木木素(MWL)、碱木素(AL)以及酸不溶木素(Klason木素)三种不同种类的木质素及磨木木素在不同热裂解温度下进行了热裂解实验,分析了不同条件下热裂解产物中主要酚类组分相对含量的变化。结果显示,裂解温度为500℃时,马尾松不同类型木质素热裂解产物存在较大差异,磨木木素、碱木素和酸不溶木素裂解产物中总酚相对含量分别为62.3%、44.86%和16.25%,结果说明磨木木素最易裂解,碱木素次之,酸不溶木素最难裂解。热裂解温度从400℃升高到500℃再升
3、高到600℃的过程中,磨木木素裂解产物中总酚相对含量仅从59.78%升高到62.31%再升高到65.72%,主要酚类组分为愈创木酚及其衍生物,各酚类组分相对含量随温度升高呈现出不同的变化趋势。关键词:马尾松;木质素;热裂解;Py-GC-MS;酚类组分中图分类号:S781.37;TK6文献标志码:A文章编号:1673-923X(2017)06-0101-07FastpyrolysisofMassonPineligninandanalysisofpyrolysisproductsGUOZhong,JIANGXinyu
4、an,LIAOYuanyuan,ZHANGMin,HUANGYilei(CollegeofMaterialsScienceandEngineering,CentralSouthUniversityofForestryandTechnology,Changsha410004,Hunan,China)Abstract:Softwoodpineligninwasusedasmaterialforfastpyrolysis,andthepyrolysisexperimentsforthreedifferentkindso
5、fligninincludingmilled-woodlignin(MWL),alkalilignin(AL)andacidinsolublelignin(Klasonlignin,KL)andMWLunderdifferentpyrolysistemperatureswerecarriedoutbyusingpyrolysis-gaschromatography-massspectrometry(Py-GC-MS)technology,andtherelativecontentchangesofthemainp
6、henoliccomponentsinpyrolysisproductsunderabovedifferentconditions.Theresultsshowedthatwhenthepyrolysistemperaturewas500C,thereweregreatdifferencesamongthepyrolysisproductsfromthethreedifferentkindsofpinelignin.Therelativecontentoftotalphenoliccomponentsinthep
7、yrolysisproductsofMWL,ALandKLwas62.3%,44.86%and16.25%andtheresultsindicatedthattheMWLwasthemosteasilycracked,andtheALwasthesecond,andtheKLwasthemostdifficult.Duringtheincreasingprocessofpyrolysistemperaturefrom400℃to500℃andthento600℃,therelativecontentoftotalp
8、henoliccomponentsinthepyrolysisproductsofMWLincreasedslightlyfrom59.78%to62.31%andthento65.72%,andthemainphenoliccomponentswereguaiacolanditsderivatives,andtherelativecontentofphenoliccom