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http://dx.doi.org/10.7464/ksct.2021.27.3.232

A Study on Catalytic Pyrolysis of Polypropylene with Ni/sand  

Kim, Soo Hyun (Department of Mineral Resources and Energy engineering, Jeonbuk National University)
Lee, Roosse (Department of Mineral Resources and Energy engineering, Jeonbuk National University)
Sohn, Jung Min (Department of Mineral Resources and Energy engineering, Jeonbuk National University)
Publication Information
Clean Technology / v.27, no.3, 2021 , pp. 232-239 More about this Journal
Abstract
In order to develop a novel system named "thermal medium and gas circulation type pyrolysis system," this study was conducted to obtain basic data for process simulation before performing the pyrolysis experiment. Polypropylene (PP) was chosen as model material in the basic pyrolysis experiment instead of waste plastic and fluidized sand (hereinafter referred to as "sand"), and it was used as a heat transfer material in the "thermal medium and gas circulation type pyrolysis system." Ni was impregnated as an active catalyst on the sand to promote catalytic pyrolysis. The basic physical properties of PP were analyzed using a thermogravimetric analyzer, and pyrolysis was performed at 600 ℃ in an N2 atmosphere to produce liquid oil. The distribution of the carbon number of the liquid oil generated through the catalytic pyrolysis reaction was analyzed using GC/MS. We investigated the effects of varying the pyrolysis space velocity and catalyst amount on the yield of liquid oil and the carbon number distribution of the liquid oil. Using Ni/sand, the yield of liquid oil was increased except with the pyrolysis condition of 10 wt% Ni/sand at a space velocity of 30,000 h-1, and the composition of C6 ~ C12 hydrocarbons increased. With increases in the space velocity, higher yields of liquid oil were obtained, but the composition of C6 ~ C12 hydrocarbons was reduced. With 1 wt% Ni/sand, the oil yield obtained was greater than that obtained with 10 wt% Ni/sand. In summary, when 1 wt% Ni/sand was used at a space velocity of 10,000 h-1, the oil yield was 60.99 wt% and the composition of C6 ~ C12 hydrocarbons was highest at 42.06 area%.
Keywords
Catalytic Pyrolysis; Polypropylene; Ni; Space velocity;
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Times Cited By KSCI : 1  (Citation Analysis)
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