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Dive into the research topics where Kaj Jakobsson is active.

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Featured researches published by Kaj Jakobsson.


Computers & Chemical Engineering | 2016

Mathematical model of precipitation of magnesium carbonate with carbon dioxide from the magnesium hydroxide slurry

Wenli Zhao; Bing Han; Kaj Jakobsson; Marjatta Louhi-Kultanen; Ville Alopaeus

Abstract A mathematical model is proposed for a precipitation process of magnesium carbonate in a heterogeneous stirred tank reactor. The model includes a description of dissolution of Mg(OH)2, absorption of CO2 and precipitation of MgCO3. The Nernst-Planck equation is used in the dissolution model to maintain the mass balance and electroneutrality. The van Krevelen–Hoftijzer expression is introduced to describe the enhancement effect of reaction between dissolved CO2 and OH− on the mass transfer rate of dissolution and absorption. In the precipitation model, a simplified population balance equation is solved by a moment method for both dissolving and precipitating particles. Unknown precipitation kinetics parameters for Mg(OH)2 MgCO3 system are fitted against experimental data and compared with Ca(OH)2 CaCO3 system. According to the present analysis, the liquid−solid and gas−liquid mass transfer dominate the global rate of precipitation. The precipitation kinetics and pH have strong influences on the concentration of reactants and the yield of precipitation.


Chemical Engineering Research & Design | 2013

Control of reflux and reboil flow rates for milli and micro distillation

Aarne Sundberg; Petri Uusi-Kyyny; Kaj Jakobsson; Ville Alopaeus


Chemical Engineering Research & Design | 2016

Feasibility of thermal separation in recycling of the distillable ionic liquid [DBNH][OAc] in cellulose fiber production

Waqar Ahmad; Alexandr Ostonen; Kaj Jakobsson; Petri Uusi-Kyyny; Ville Alopaeus; Uula Hyväkkö; Alistair W. T. King


Archive | 2010

Development and modeling of micro distillation column

Aarne Sundberg; Petri Uusi-Kyyny; Kaj Jakobsson; Ville Alopaeus


Archive | 2014

Dissolution model in three-phase reactive crystallization

Wenli Zhao; Mehdi Hasan; Kaj Jakobsson; Marjatta Louhi-Kultanen; Ville Alopaeus


Archive | 2014

19th International Symposium on Industrial Crystallization, Toulouse, France, 2014

Wenli Zhao; Mehdi Hasan; Kaj Jakobsson; Marjatta Louhi-Kultanen; Ville Alopaeus


Archive | 2013

23rd European symposium computer aided process engineering

Kaj Jakobsson; Susanna Kuitunen; Ville Alopaeus


Archive | 2010

Distillation and Absorption 2010, Eindhoven, The Netherlands, 12-15 September, 2010

Aarne Sundberg; Petri Uusi-Kyyny; Kaj Jakobsson; Ville Alopaeus


Archive | 2009

Modular, Horizontal Micro-Distillation Column

Aarne Sundberg; Petri Uusi-Kyyny; Kaj Jakobsson; Ville Alopaeus


Archive | 2009

AIChe Annual Meeting, Nashville, USA, Novenber 8-13, 2009

Aarne Sundberg; Petri Uusi-Kyyny; Kaj Jakobsson; Ville Alopaeus

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Ville Alopaeus

University of Science and Technology

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Aarne Sundberg

Helsinki University of Technology

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Ville Alopaeus

University of Science and Technology

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Marjatta Louhi-Kultanen

Lappeenranta University of Technology

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Mehdi Hasan

Lappeenranta University of Technology

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