Effects of the types of zeolites on catalytic upgrading of pyrolysis wax oil |
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| Institution: | 1. University of Pannonia, Department of Process Engineering, 10, Egyetem Street, H-8200 Veszprém, Hungary;2. University of Pannonia, MOL Department of Hydrocarbon and Coal Processing, 10, Egyetem Street, H-8200 Veszprém, Hungary;1. Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, P.O. Box: 24885, Safat, 13109, Kuwait;2. Division of Chemical & Petroleum Engineering, School of Engineering, London South Bank University, London, SE1 0AA, UK;3. Department of Chemical Engineering, University College London (UCL), London, WCIE 7JE, UK;4. Mechanical Engineering Program, School of Engineering, University of Guelph, Guelph, Ontario, N1G 2W1, Canada;1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China;2. Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China;3. Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA;4. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;5. Department of Biological Systems Engineering, Washington State University, 2710 Crimson Way, Richland, WA 99354, USA;1. GEPEA, UMR 6144, DSEE, IMT-Atlantique, Nantes 44307, France;2. Modeling Centre, Lebanese University, Beirut, Lebanon;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 |
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| Abstract: | Because zeolites play an important role in an upgrading catalyst for heavy hydrocarbons in industrial refinery processes, the effects of the zeolite type on the upgrading of pyrolysis wax oil are investigated in this study. Raw pyrolysis wax oil was obtained from the pyrolysis of municipal plastic wastes in a commercial rotary kiln pyrolysis plant (Dongmyong RPF Co.). The catalystic experiments are performed for the three different types of commercial zeolites with different physicochemical properties in a continuous fixed bed reactor at 450 °C for 1 h as a MAT(micro-activity test) method: HZSM-5 (pure), zeolite Y (HY; pure or including 20% clay) and mordenite (HM; including 20% clay or alumina) catalysts. The highest conversion of pyrolysis wax oil into light hydrocarbons such as gas products and gasoline-range hydrocarbons is obtained for the HZSM-5 catalyst among them, and the composition of liquid products is found to become in the main aromatic components due to a shape selectivity. For the case of zeolite Y(HY), medium activity and the highest fraction of branched hydrocarbons with a high octane number, as well as a high fraction of aromatic products are shown. However, the mordenite (HM) with one-dimensional pore structure shows the lowest conversion of pyrolysis wax oil into light hydrocarbons and a very high fraction of paraffin product in the liquid product like the characteristics of raw pyrolysis wax oil. |
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