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
N1 - Funding Information:
We gratefully acknowledge the financial support of this work by the Ministry of Education, Science and Culture, Japan through the Grant-In-Aid for Scientific Research No. 08232258 and by the Original Industrial Technolog R&D Promotion Program from the New Energy and Industrial Technology Development Organization (NEDO) of Japan through Grant 8G-010-1. We thank Mr Mitsuo Kaji of the Plastic Waste Management Institute of Japan for helpful discussion. We are also thankful to Shinagawa Refractory Co. Ltd. for the surface area measurements of our catalyst samples.
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
UR - http://www.scopus.com/inward/record.url?scp=0031200291&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031200291&partnerID=8YFLogxK
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 -