Valorization by thermal cracking over silica of polyolefins dissolved in LCO |
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| Affiliation: | 1. Departamento de Ingenierı́a Quı́mica, Universidad del Paı́s Vasco, Apartado 644, 48080 Bilbao, Spain;2. Departamento de Ingenierı́a Quı́mica y del Medio Ambiente, Universidad del Paı́s Vasco, Plaza de la Casilla 3, 48012 Bilbao, Spain;3. Facultad de Ingenierı́a Quı́mica, Universidad Nacional de Ingenierı́a, Apartado 5595, Managua, Nicaragua;1. Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources, Environmental & Chemical Engineering, Nanchang University, Nanchang, 330031, China;2. Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN, 55108, United States;1. Research Center for Artificial Photosynthesis, Osaka Metropolitan University, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan;2. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, Aoba 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan;3. Graduate School of Environmental Studies, Tohoku University, 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan;4. Division for the Establishment of Frontier Sciences of Organization for Advanced Studies, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan;5. Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan |
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| Abstract: | A study has been made of the cracking of polyethylene (PE) and polypropylene (PP) (which are the main components of post-consumer plastic wastes) dissolved in the Light Cycle Oil (LCO) product stream of a commercial Fluid Catalytic Cracking (FCC) unit. The cracking has been carried out on a mesoporous silica (pore size between 3 and 30 nm) in the 723–823 K range. This strategy for upgrading plastics and solvents together avoids heat transfer limitations and other problems inherent to the cracking of solid plastics. The polyolefins are transformed mainly into the components that make up the pool of gasoline (C5–C12). Furthermore, the incorporation of polyolefins has a synergistic effect on the cracking of LCO and causes a major decrease in the content of aromatics of the pool of gasoline and an increase in the content of olefins, paraffins and i-paraffins. |
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