Catalytic pyrolysis of nylon-6 to recover caprolactam

被引:62
作者
Czernik, S [1 ]
Elam, CC [1 ]
Evans, RJ [1 ]
Meglen, RR [1 ]
Moens, L [1 ]
Tatsumoto, K [1 ]
机构
[1] Natl Renewable Energy Lab, Golden, CO 80401 USA
关键词
nylon-6; caprolactam; depolymerization; catalytic pyrolysis; molecular-beam mass-spectrometry; fluidized bed reactor; plastics recycling;
D O I
10.1016/S0165-2370(98)00068-0
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Catalytic pyrolysis has been proposed as a possible process for the recovery of caprolactam from waste nylon-6. Promising process conditions, i.e. catalyst and temperature were identified using a micro-scale reactor/molecular-beam mass-spectrometer system. At 330-360 degrees C, in the presence of alpha-alumina supported KOH, the reaction proceeded at a high rate and selectivity. Only a few minutes were needed to complete the nylon-6 depolymerization with a caprolactam yield of 85%. These results were confirmed in a bench-scale fluidized bed reactor system. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:51 / 64
页数:14
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