温度对提取精油樟木热解产物组成和特性的影响  

Effect of Temperature on the Composition and Structure of Solid and Liquid Products Obtained Through Pyrolysis of Camphor Extracted Essential Oil Residues

作　　者：邱竑韫 刘沙沙 闫实 黄慧[1] QIU Hong-yun;LIU Sha-sha;YAN Shi;HUANG Hui(Jiangxi Academy of Forestry Sciences,Nanchang 330013,Jiangxi,P.R.China;Nanjing Polytechnic Institute,Nanjing 210048,Jiangsu,P.R.China;Southwest Forestry University,Kunming 650224,Yunnan,P.R.China)

机构地区：[1]江西省林业科学院,江西南昌330013 [2]南京科技职业学院,江苏南京210048 [3]西南林业大学,云南昆明650224

出　　处：《林产工业》2024年第12期26-32,共7页China Forest Products Industry

基　　金：江西省科技厅重大科技研发专项(20203ABC28W016);江西省林业局樟树研究专项(2020-04-04);江苏省高等学校基础科学(自然科学)研究面上项目(23KJB480005);南京科技职业学院“科研北斗计划”项目(NJPI-RC-2023-13)。

摘　　要：樟树提取精油后剩余物(CEOR)的有效开发利用是樟树精油全产业链发展的重要方向。本文首先通过热重分析考察了CEOR在热解过程中的热解特性及动力学;接着采用固定床热解反应器在不同温度(400、500、600℃和700℃)下对其进行热解,探究温度对热解产物组成和特性的影响。结果表明:随着升温速率的提高,TG与DTG曲线向高温区偏移,残余质量增多,活化能由37.07 kJ/mol增大到41.31 kJ/mol。随着热解温度的升高,CEOR热解所得固、液、气产物相对含量变化较大,固体生物质炭比表面积和孔容积呈增加的趋势,I_((GR+VL+VR))/I_D值明显降低,碳结构的芳香性和碳化程度增加。液体产物中检测到的主要成分有50种,包括酚类、酮类、酸类、烃类和醛类,以及少量的酯类、醇类等物质。当热解温度为600℃时,酚类化合物的相对含量达48.46%,主要是烷氧基酚类化合物。The effective utilization of camphor extracted oil residues(CEOR)is an important focus in the development of the camphor essential oil industry's entire chain.In this paper,the pyrolysis characteristics and kinetics of CEOR were investigated by thermogravimetric analysis.Then a fixed-bed pyrolysis reactor was used to pyrolyze the pyrolysis products at different temperatures(400,500,600℃and 700℃)to study the influence of temperature on the composition and characteristics of the pyrolysis products.The results showed that with the increasing of heating rate,TG and DTG curves shifted to the high temperature region,the residual mass increased,and the activation energy increased from 37.07 kJ/mol to 41.31 kJ/mol.With the increasing of pyrolysis temperature,the relative contents of solid,liquid,and gas products obtained from CEOR pyrolysis changed greatly.The specific surface area and pore volume of biochar increased,the I(GR+VL+VR)/ID value decreased significantly,and the aromaticity and carbonization degree of carbon structure increased.There were 50 main components detected in the liquid products,mainly phenols,ketones,acids,hydrocarbons,and aldehydes,as well as a small amount of esters,alcohols and other substances.When the pyrolysis temperature was 600℃,the relative content of phenolic compounds was 48.46%,and mainly alkoxy phenolic compounds.

关 键 词：提取精油樟木 热解 热解特性 热解产物 生物质炭 

分 类 号：TS6[轻工技术与工程] TS396