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Simulation of fine polydisperse particle condensational growth under an octadecane–nitrogen atmosphere
Institution:1. Center for Mesoscience, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100190, China;1. Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96, Göteborg, Sweden;2. Department of Applied Mechanics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden;1. Institute for Chemicals and Fuels from Alternative Resources, Western University, 22312 Wonderland Rd., Ilderton, ON, N0 M2AO, Canada;2. Edmonton Research Centre, Syncrude Canada Ltd, 9421 17th Ave, Edmonton, AB, T6N 1H4, Canada;3. The Petroleum Institute, PO Box 2533, Abu Dhabi, UAE;1. Mechanical Metallurgy Division, Bhabha Atomic Research Centre, Mumbai 400085, India;2. Deptartment of Chemical Engineering, Indian Institute of Technology-Bombay, Mumbai 400076, India;3. Reactor Engineering Division, Bhabha Atomic Research Centre, Mumbai 400085, India;4. Deptartment of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India;1. Department of Chemical Engineering, College of Engineering, Bharati Vidyapeeth Deemed University, Pune 411 043, India;2. Department of Biotechnology and Chemical Technology, School of Chemical Technology, Alto University, P.O. Box 16100, FI-00076 Aalto, Finland;3. Department of Chemical Engineering, City College of New York, CUNY, NY, USA
Abstract:The evolution of particle size distribution (PSD) of fine polydisperse particles at high number concentrations (>105 cm?3) was simulated through a combined model employing direct quadrature method of moments (DQMOM) with heat and mass transfer equations. The PSD was assumed to retain log-normal distribution during the heterogeneous condensation process. The model was first verified by exact solution and experimental data prior to investigating the influence of initial conditions on final PSD under an octadecane–nitrogen atmosphere. Low particle number concentrations and high vapor concentrations were beneficial to shift the PSD to larger particles having a narrower distribution. Additionally, vapor depletion has more influence on the final PSD than the heat release parameter for a number concentration of 106 cm?3. This study may assist the design process of a gas–solid separating cyclone, to eliminate dust from high-temperature volatiles by pyrolysis of solid fuels.
Keywords:Simulation  Condensational growth  Polydisperse particles  Particle size distribution
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