TY - JOUR
T1 - Catalytic degradation of polyethylene into fuel oil over mesoporous silica (KFS-16) catalyst
AU - Sakata, Yusaku
AU - Azhar Uddin, M.
AU - Muto, Akinori
AU - Kanada, Yasufumi
AU - Koizumi, Kazuo
AU - Murata, Katsuhide
PY - 1997/8
Y1 - 1997/8
N2 - The thermal degradation of plastic polymers into fuel oil over mesoporous silica (KFS-16) catalyst has been investigated. The product yields, composition and degradation rate of polyethylene over KFS-16 were compared with those over solid acid catalyst (silica-alumina and zeolite) and non-catalytic thermal degradation. The initial rate of degradation of PE over KFS-16, which possesses no acid sites was as fast as that over silica-alumina (SA-1) and the yield of liquid products was higher. The composition of the liquid products of degradation over KFS-16 was different from that over SA-1 and similar to that of non-catalytic thermal degradation. SA-1 catalyst deactivated very rapidly due to coke deposition, whereas KFS-16 deactivated much more slowly. These findings over mesoporous silica suggest that the mesopores surrounded by the silica sheet may act as a flask for storing radical species for a long time and then long-lived radicals accelerate the degradation of plastics.
AB - The thermal degradation of plastic polymers into fuel oil over mesoporous silica (KFS-16) catalyst has been investigated. The product yields, composition and degradation rate of polyethylene over KFS-16 were compared with those over solid acid catalyst (silica-alumina and zeolite) and non-catalytic thermal degradation. The initial rate of degradation of PE over KFS-16, which possesses no acid sites was as fast as that over silica-alumina (SA-1) and the yield of liquid products was higher. The composition of the liquid products of degradation over KFS-16 was different from that over SA-1 and similar to that of non-catalytic thermal degradation. SA-1 catalyst deactivated very rapidly due to coke deposition, whereas KFS-16 deactivated much more slowly. These findings over mesoporous silica suggest that the mesopores surrounded by the silica sheet may act as a flask for storing radical species for a long time and then long-lived radicals accelerate the degradation of plastics.
KW - Catalytic degradation
KW - Fuel oil
KW - Mesoporous silica
KW - Polyethylene
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U2 - 10.1016/S0165-2370(97)00052-1
DO - 10.1016/S0165-2370(97)00052-1
M3 - Article
AN - SCOPUS:0031200291
VL - 43
SP - 15
EP - 25
JO - Journal of Analytical and Applied Pyrolysis
JF - Journal of Analytical and Applied Pyrolysis
SN - 0165-2370
IS - 1
ER -