Recovery of carbon fibres by the thermolysis and gasification of waste prepreg
Recovery of carbon fibres by the thermolysis and gasification of waste prepreg
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DOI：
10.1016/j.jaap.2013.04.012
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发表时间：
2013-11-01
影响因子：
6
通讯作者：
Gonzalez, Carlos
中科院分区：
文献类型：
--
作者：
Lopez, Felix A.;Rodriguez, Olga;Gonzalez, Carlos
本文探讨了从航空工业中使用的复合材料中回收碳纤维，通过在空气气氛中的热处理和气化的组合过程。废物在试验工厂中在500摄氏度、600摄氏度或700摄氏度下进行热处理，以确定最佳热处理温度。所产生的固体残留物-炭覆盖的碳纤维-通过SEM和XPS表征。覆盖纤维的炭的气化的最佳时间是在组合的热解/气化测定中确定的。在最佳温度（500摄氏度）的热处理后，12升/小时的纯空气注入到反应器和焦炭气化进行在500摄氏度为30-180分钟。最佳气化时间为30分钟。较长的气化时间导致生产的纤维直径较小，表面氧化和抗拉强度降低。最佳回收的纤维显示出原始纤维的拉伸强度的约70%和它们的弹性的约90-96%。(C)2013爱思唯尔有限公司版权所有。
This paper examines the recovery of carbon fibres from a composite used in the aeronautical industry, via a combined process of thermolysis and gasification in an air atmosphere. The waste was thermolysed at 500 degrees C, 600 degrees C or 700 degrees C in a pilot plant to determine the optimum thermolysis temperature. The solid residues produced - char covered carbon fibres - were characterized by SEM and XPS. The optimum time for the gasification of the char covering the fibres was determined in a combined thermolysis/gasification assay. After thermolysis at the optimum temperature (500 degrees C), 12 l/h of pure air were injected into the reactor and char gasification performed at 500 degrees C for 30-180 min. The optimum gasification time was 30 min. Longer gasification times led to the production of fibres of smaller diameter with oxidized surfaces and reduced tensile strength. The optimally recovered fibres showed about 70% of the tensile strength of virgin fibres and some 90-96% of their elasticity. (C) 2013 Elsevier B.V. All rights reserved.