Catalytic degradation of waste polyolefinic polymers using spent FCC catalyst with various experimental variables |
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Authors: | Email author" target="_blank">Kyong-Hwan?LeeEmail author Dae-Hyun?Shin |
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Affiliation: | (1) Clean Energy Research Department, Korea Institute of Energy Research, 305-343 Daejeon, Korea |
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Abstract: | Liquid-phase catalytic degradation of waste polyolefinic polymers (HDPE, LDPE, PP) over spent fluid catalytic cracking (FCC)
catalyst was carried out at atmospheric pressure with a stirred semi-batch operation. The effect of experimental variables,
such as catalyst amount, reaction temperature, plastic types and weight ratio of mixed plastic on the yield and accumulative
amount distribution of liquid product for catalytic degradation was investigated. The initial rate of catalytic degradation
of waste HDPE was linearly increased with catalyst amount (4-12 wt%), while that was exponentially increased with reaction
temperature (350-430 ‡C). Spent FCC catalyst in the liquid-phase catalytic degradation of polymer was not deactivated fast.
The product distribution from catalytic degradation using spent FCC catalyst strongly depended on the plastic type. The catalytic
degradation of mixed plastic (HDPE: LDPE: PP: PS=3: 2: 3: 1) showed lower degradation temperature by about 20 ‡C than that
of pure HDPE. |
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Keywords: | Catalytic Degradation Spent FCC Catalyst Catalyst Amount Reaction Temperature Deactivation of Catalyst Plastic Type |
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