Blar i Institutt for prosess-, energi- og miljøteknologi på forfatter "Jayarathna, Chameera"
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CPFD Modeling to study the Hydrodynamics of an Industrial Fluidized Bed Reactor for Alumina Chlorination
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Journal article; Peer reviewed, 2022)Aluminum is one of the most used metals. Since aluminum has a unique combination of appealing properties and effects, it allows significant energy savings in many applications, such as vehicles and buildings. Although this ... -
CPFD Simulations on a Chlorination Fluidized Bed Reactor for Aluminum Production: An Optimization Study
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Journal article; Peer reviewed, 2022)Early CPFD simulation studies on designing a fluidized bed reactor for alumina chlorination showed that the model suffers from high particle outflow and dense phase bed channeling. The present study is aimed to optimize ... -
Design of a Medium-Scale Circulating Fluidized Bed Reactor for Chlorination of Processed Aluminum Oxide
Barahmand, Zahir; Aghaabbasi, Omid; Salcido, Jose Luis; Rustad, Emmy Kristine; Jayarathna, Chameera; Ratnayake, Chandana (Journal article; Peer reviewed, 2022)Fluidization is a well-established and widely used technology in the process industry. The production stability and the large effective contact area between the active substances, resulting in high mass and heat transfer ... -
The Effect of Impurities on γ-Alumina Chlorination in a Fluidized Bed Reactor: A CPFD Study
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Peer reviewed; Journal article, 2022)Alumina is one of the most widely used materials today, with a total annual production of millions of tonnes of highly pure alumina. A large portion of this is used to make metal aluminum. Apart from that, a growing amount ... -
Fluidized bed calcination of cement raw meal: Laboratory experiments and CPFD simulations
Samani, Nastaran Ahmadpour; Jayarathna, Chameera; Tokheim, Lars-Andre (Journal article, 2020)The chemical and thermal processes associated with the decarbonation and fuel combustion in the cement kiln process produce a large amount of carbon dioxide (CO2) contributing with around 8 % of the global CO2 emissions. ... -
Improved multi-stage cross-flow fluidized bed classifier
Jayarathna, Chameera; Balfe, Michael; Moldestad, Britt Margrethe Emilie; Tokheim, Lars-Andre (Peer reviewed; Journal article, 2019)In the present work, improvements to a novel fluidized bed solids classification system previously published by Jayarathna et al. are discussed (Jayarathna et al., 2018 [1]). The system is designed for a high temperature ... -
Sensitivity and Uncertainty Analysis in a Circulating Fluidized Bed Reactor Modeling
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Peer reviewed; Journal article, 2022)As in many real applications, in the world of fine powders and small particles, there are uncertainties and vagueness in the parameters such as particle size, sphericity, initial solid void fraction, envelope density, etc. ... -
Study of the Thermal Performance of Industrial Alumina Chlorination Reactor Based on CPFD Simulation
Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Peer reviewed; Journal article, 2022)As a part of the new sustainable aluminum production process under study, alumina chlorination plays a crucial role. The relevant process is an exothermic reaction in a fluidized bed reactor. The solid alumina reacts with ...