Microwave pyrolysis of polystyrene and polypropylene mixtures using different activated carbon from biomass |
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| Affiliation: | 1. Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Florence, Italy;2. Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), Via Celso Ulpiani 27, Bari, Italy.;1. Department of Chemical Engineering, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382007, India;2. Department of Chemical Engineering, Indian Institute of Petroleum and Energy Visakhapatnam, Andhra Pradesh, 530003, India;3. Delaware Energy Institute, University of Delaware, Newark, DE, DE 19711, USA;4. Multiscale Reaction Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia;5. Department of Mechanical Engineering, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382007, India;6. School of Petroleum Technology, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382007, India;7. Chennai Petroleum Corporation Limited, Manali, Chennai, 600068, India;8. Department of Chemical Engineering, National Institute of Technology Karnataka, Surathkal, 575025, India;9. Department of Chemical Engineering, Andhra University College of Engineering (A), Andhra University, Visakhapatnam, 530003, India;10. Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, 600036, India;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. College of Mechanical Engineering, Guangxi University, University Road 100, Xixiangtang District, Nanning City, 530004, PR China;2. Guangxi Key Laboratory of Petrochemical Resources Processing and Process Intensification Technology, Nanning City, 530004, China;3. Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, Guangzhou City, 510640, China |
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| Abstract: | In this study, microwave pyrolysis was experimented with mixed types of plastic waste. Two different plastic wastes polystyrene waste (PSW) and polypropylene waste (PPW) were used as feedstock. Carbon and activated carbon were synthesized from different biomass; rice husk (RH), corn husk (CH) and coconut sheath (CS) respectively which are used as microwave susceptors. The effect of impregnation on product yields was studied. Microwave pyrolysis at 900 W and with a polymer to an absorbent ratio of 10:1, produced the highest oil yield of 84.30 wt% when coconut sheath activated carbon (CSAC) was used as an absorbent. The reaction time was 10 min for the complete decomposition of polymer mixtures. Oil properties were determined and a high calorific value of 46.87 MJ kg?1 was obtained. These properties were compared to conventional fuel properties and the product oil has a density of 0.76 g ml?1 and viscosity of 2.4 cSt which is an equivalent fraction obtained to that of gasoline. Product oil has a styrene recovery of 67.58% from microwave pyrolysis. The results demonstrate that, microwave pyrolysis has a great potential for energy recovery from mixed plastic waste and the use of agricultural residues as absorbents enhanced the production efficiency of the process. |
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| Keywords: | Microwave pyrolysis Mixed plastic waste Activated carbon Rice husk Corn husk Coconut sheath |
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