Lee, Hong-shik Jeong, Ju Hyeong Cho, Hang-Kyu Koo, Chong Min Hong, Soon Man Kim, Hwayong Lee, Youn-Woo 2024-01-20T22:06:44Z 2024-01-20T22:06:44Z 2021-09-03 2008-12 0141-3910 https://pubs.kist.re.kr/handle/201004/132954 The recycling of cross-linked polyethylene (XLPE) by a decross-linking reaction in supercritical methanol was studied using a batch reactor. XLPEs with initial gel contents of 45, 55 and 65% were employed and subjected to reaction temperatures between 320 and 360 degrees C. Complete decross-linking of XLPE was achieved in 10 min in supercritical methanol at 360 degrees C and 15 MPa. For the first time, chemical kinetics for the decross-linking reaction is proposed based on the gel concentration, and applicable to the reactor design. With respect to the gel concentration, the first-order reaction model agreed well with the experimental results. The evaluated kinetic constant was 0.0867 +/- 0.0082 cm(3)/mg min at 350 degrees C, and the activation energy was 578 +/- 25 kJ/mol. (C) 2008 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD PEROXIDES DENSITY FUEL A kinetic study of the decross-linking of cross-linked polyethylene in supercritical methanol Article 10.1016/j.polymdegradstab.2008.09.006 1 POLYMER DEGRADATION AND STABILITY, v.93, no.12, pp.2084 - 2088 POLYMER DEGRADATION AND STABILITY 93 12 2084 2088 scie scopus 000261857000002 2-s2.0-56249115181 Polymer Science Polymer Science Article PEROXIDES DENSITY FUEL Cross-linked polyethylene Supercritical methanol Decross-linking Kinetics Recycling