Browsing USN Open Archive by Author "Tokheim, Lars-Andre"
Now showing items 1-11 of 11
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CO2 capture through mineralization of CaO-containing by-products
Ghazi, Amirhossein (Master thesis, 2024)The amount of CO2 in the atmosphere is continuously increasing, resulting in climate change and global warming. Industrial processes contribute a substantial share in the amount of CO2 released to the atmosphere. On the ... -
CPFD simulation of an electrically heated fluidized bed calciner with binary particles
Jacob, Ron Mangalam; Tokheim, Lars-Andre (Peer reviewed; Journal article, 2023)Electrifying a calciner with clean energy can cut fuel emissions and produce a stream of relatively pure CO2 from the calcination reaction (CaCO3 → CaO + CO2), which can be utilized or stored. A fluidized bed calciner ... -
CPFD simulation of enhanced cement raw meal fluidization through mixing with coarse, inert particles
Samani, Nastaran Ahmadpour; Jayarathna, Chameera K.; Tokheim, Lars-Andre (Journal article, 2020)In the current work, computational particle and fluid dynamics (CPFD) simulations are used to study an electrically heated bubbling fluidized bed (BFB) used as a calciner in a cement manufacturing process, applying a ... -
Design of Electrified Calciner for Direct Capture of CO2 from Cement Raw Meal
Samaei, Ladan (Master thesis, 2024)The main focus in this thesis is on designing an electrified calciner for direct CO2 capture from cement raw meal, investigating various operating conditions using CPFD simulations. The calciner, a binary fluidized bed ... -
Electrified calciner concept for CO2 capture in pyro-processing of a dry process cement plant
Jacob, Ron Mangalam; Tokheim, Lars-Andre (Peer reviewed; Journal article, 2023)Around two-thirds of the CO2 emission from the cement industry comes from calcite decomposition (CaCO3 → CaO + CO2), and most of this reaction happens in the calciner. So, it is possible to reduce the CO2 emission significantly ... -
Electrified externally heated rotary calciner for calcination of cement raw meal
Jacob, Ron Mangalam; Pinheiro, Jean Patrick; Tokheim, Lars-Andre (Peer reviewed; Journal article, 2023)The cement industry can reduce its CO2 emissions by electrifying the calciner. It can avoid emissions from fuel combustion and produce pure CO2 from the calcination reaction (CaCO3 → CaO + CO2) for direct capture. A ... -
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 ... -
A new Approach for Scaling Up from a Small Cold to a Large Hot Bed for Biomass Conversion in a Bubbling Fluidized Bed Reactor
Agu, Cornelius Emeka; Thapa, Rajan Kumar; Pfeifer, Christoph; Tokheim, Lars-Andre; Moldestad, Britt Margrethe Emilie (Peer reviewed; Journal article, 2020)Bubbling fluidized beds are simple and attractive means of achieving efficient conversion of biomass if particle segregation and the associated effects are minimized. To improve the knowledge of fluidized bed reactor design, ... -
Novel design of a rotary calciner internally heated with electrical axial heaters: Experiments and modelling
Jacob, Ron Mangalam; Tokheim, Lars-Andre (Peer reviewed; Journal article, 2023)As the share of renewable energy increases, green electricity may help reduce the carbon footprint in the lime industry. Electrifying the calciner can produce relatively pure CO2 from the calcination process (CaCO3 → CaO ... -
Opportunities and challenges of using SRF as an alternative fuel in the cement industry
Kahawalage, Amila Chandra; Melaaen, Morten Christian; Tokheim, Lars-Andre (Journal article, 2023)Over two billion tonnes of municipal solid wastes (MSW) are generated annually from households, industrial facilities, and commercial sites. The non-hazardous fraction of MSW is used to produce solid recovered fuels (SRF), ...