木质包装废弃物热化学反应转化特性研究

Study on Thermochemical Characteristics of Wood Packaging Waste

采用热重红外联用分析和热解气质联用分析技术,考察了红橡木材包装废弃物的热分解、气相组分生成及分布规律。研究表明:在800℃终温和10℃/min的升温速率条件下,红橡木材包装废弃物的主要热解阶段集中在220～385℃,失重率为78.99%;高温区热解活化能明显低于低温区,说明随着温度的升高较容易发生热解反应;热解初期主要是水分和部分酸类、醛类物质的析出,主要热解阶段为H2O,CO2,CO,CH4和酸类、醛类、酯类等的大量析出,在热解后期主要为CO2和CH4的析出;热解析出的气体主要为含氧官能团的有机化合物,包括酸类(19.29%)、醛类(15.14%)、酯类(9.97%)、酮类(9.00%)、糖类(8.59%)、酚类(5.29%)、醇类(3.63%)等。

Characteristics of thermal decomposition and gas components generation and distribution of wood packaging waste of red oak were investigated using TG-FTIR and Py-GC/MS. The result showed that at 800 ℃ and 10 ℃/rain, the main stage of pyrolysis concentrates in the range of 220-385℃C and the total weight loss is 78.99%; activation energy in high temperature range is significantly lower than that in low temperature range, so it is easier for the thermal decomposition in higher temperature; H20 and part of acids and aldehydes are generated in the initial stage of pyrolysis; A large amount of H2O, CO2, CO, CH4 , acids, aldehydes, esters is released in the main stage; CO2 and CH4 are released in the later stage; the pyrolysis vapors include oxygen- containing functional compounds, such as acids （19.29%）, aldehydes （15. 14%）, esters （9. 97%）, ketones （9.00%） , sugars （8.59%）, phenols （5.29%）, and alcohols （3. 630%）, etc.