摘要
以高密度聚乙烯(HDPE)塑料为原料,通过高温热解-CO2气化法成功制备了清洁燃料合成气CO及H2。使用热重分析法对HDPE的热解及气化过程进行分析,结果发现材料的失重过程主要分为2个阶段:在450℃左右,HDPE的长链开始发生裂解为低分子碳链,部分低分子碳链进一步裂解为小分子量挥发气体,此阶段材料的失重率达到80%;当温度达到900℃时,热解后剩余的焦样开始在CO2气氛下气化。另外,红外光谱测试显示气化过程中生成的CO量明显低于热解过程。为研究温度对材料失重率的影响,改变热解温度(400~550℃)和气化温度(900~1100℃),发现随着温度的升高,热解过程及气化过程原料的失重率均相应上升,主要是因为CO2气氛下的热解过程及气化过程均为吸热反应,而温度的升高将推动反应正向进行。
Using high-density polyethylene(HDPE)plastics as raw materials,CO and H2,a clean fuel synthesis gas,were successfully prepared by high-temperature pyrolysis-CO2 gasification.Using thermogravimetric analysis to analyze the pyrolysis and gasification process of HDPE,it was found that the weightlessness process of the material is mainly divided into two stages:at about 450℃,the long chain of HDPE begins to crack into low molecular carbon chains,partly low The molecular carbon chain is further cracked into a small molecular weight volatile gas.At this stage,the weight loss rate of the material reaches 80%;when the temperature reaches 900℃,the remaining char after pyrolysis begins to gasify in a CO2 atmosphere.In addition,infrared spectroscopy tests show that the amount of CO generated during the gasification process is significantly lower than the pyrolysis process.In order to study the effect of temperature on the weight loss rate of the material,the pyrolysis temperature(400~550℃)and the gasification temperature(900~1100℃)were changed,and it was found that as the temperature increased,the weight loss rate of the pyrolysis process and the gasification process raw materials Both increase accordingly,mainly because the pyrolysis process and gasification process under the CO2 atmosphere are both endothermic reactions,and the increase in temperature will push the reaction forward.
作者
孙莉莎
帅林
王雅蕾
SUN Li-sha;SHUAI lin;WANG Ya-lei(Chongqing City Management College,Chongqing 401331,China;Chongqing Public Traffic Technical SchoolChongqing 402247,China)
出处
《塑料科技》
CAS
北大核心
2020年第7期64-66,共3页
Plastics Science and Technology
基金
重庆市教育委员会科学技术研究计划青年项目资助项目(KJQN201803311)。
