Selaus koulutusohjelman mukaan kokoelmassa VäitöskirjatSchool of Engineering Science, Kemiantekniikka
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A conceptual, holistic framework to overcome limitations and constraints of design in laser based powder bed fusion of metals: Case novel separation and purification units
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 14.12.2023)The advancements of digitization and the fourth industrial revolution has introduced several modern technologies, among which additive manufacturing (AM), known also as industrial 3D printing, has significant role. Additive ... -
A salt and alkali synergy for synthesising active carbons from lignin: porosity development and techno-economic assessment
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 22.08.2023)Active carbons (AC) are the most common and efficient adsorbents. Alkali activation (using NaOH or KOH) was found to be a promising method for AC production since it allows gaining large surface area, high yield and ... -
Application of differential ion mobility spectrometry for detection of water pollutants
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 21.09.2020)Intentions to utilize differential ion mobility spectrometry (DMS) for environmental applications including the monitoring of volatile organic compounds (VOCs) or semivolatile organic compounds (SVOCs) in aqueous media ... -
Application of diverse feedstocks for biodiesel production using catalytic technology
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 24.03.2020)Recently the rise in population and demand in energy for growth and development of countries leads to more consumption of fossil fuels which is a non-renewable source. The excessive usage of non-renewable resources results ... -
Atomic Layer Deposition of Catalytic Materials for Environmental Protection
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 11.06.2019)The reduction of toxic pollutants emitted by human activities to ambient air is an important issue nowadays. The technological approach to this problem is the development of different oxidation techniques together with ... -
Bioprospecting for Nordic photosynthetic consortia for wastewater treatment, carbon capture, and value creation
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 13.12.2023)Microalgal biotechnology has been proposed as a potential solution to multiple global challenges, especially carbon capture, wastewater treatment, and bioproduction of valuable fuels and materials. Conventional microalgal ... -
Continuous Electrochemical Activation of Peroxydisulfate Mediated by Single-Electron Shuttle
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 07.05.2021)With the burgeoning development of various industries, an increasing number of organic compounds have been synthesized to satisfy societal demand. However, the unavoidable emissions of the used compounds into the natural ... -
Controlling particle morphology in the in-situ formation of precipitated calcium carbonate-fiber composites
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 12.11.2021)When precipitated or synthetized calcium carbonate (PCC) is prepared in the presence of cellulosic fibers, a large fraction of the PCC attaches partially onto and even into the fibers, forming a PCC-fiber composite. As the ... -
Development of liquid–liquid extraction processes for concentrated hydrometallurgical solutions
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 20.01.2023)Hydrometallurgical liquid–liquid extraction is a separation and purification method used for the recovery of metals from aqueous solutions. In this thesis, process design methods were studied and evaluated for the development ... -
Direct capture of CO2 from air using amine-functionalized resin - Effect of humidity in modelling and evaluation of process concepts
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 17.12.2021)Direct air capture (DAC) using adsorbents is a promising negative emissions technology if coupled with CO2 storage and is a viable option as a CO2 source for producing truly carbon-neutral synthetic fuels. However, if this ... -
Dissolution of magnetite and hematite in acid mixtures
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 04.11.2022)As the quality of raw materials decreases and legislation tightens, interest in various alternative materials has grown. For example, raw materials often contain iron as an impurity, which must be removed before the actual ... -
Electrochemical recovery of rare-earth elements from NdFeB magnets
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 09.12.2022)The use of the rare-earth elements (REEs) is steadily increasing and, on the other hand, possibilities for their substitution in modern advanced technologies, especially in green energy applications, are limited. Recently, ... -
Enhanced micropollutant removal and nutrient recovery in municipal wastewater treatment
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 27.04.2020)Depleting natural resources such as fresh water and phosphate minerals creates pressure to pursue towards resource recovery in municipal wastewater treatment. In addition, the aquatic environment is under stress due to ... -
Experimentally validated numerical modelling of reacting multiphase flows in stirred tank reactors
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 12.04.2019)Homogenization of reacting flows by mixing is often important in order to achieve high reaction rates. Mechanical RANSagitation is the usual way to homogenize fluids used in industry. When supplied to fluid media, mechanical ... -
Fast contact copper extraction
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 19.12.2022)The intensification of copper solvent extraction was examined in this thesis. Extraction with hydroxyoximes is used in industry for copper separation. The reaction between hydroxyoxime and copper is a two-phase interfacial ... -
Fenton chemistry beyond remediating wastewater and producing cleaner water
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 29.05.2020)The production, use and transformation of inorganic and organic chemical compounds are negatively affecting the global environment, whereas the disposal of byproducts generated at urban wastewater treatment plants isbecoming ... -
From alternative sources of cellulose to ultrafiltration membranes
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 14.12.2023)Cellulose, the most abundant biopolymer on the planet, presents a renewable alternative to petroleum-based polymeric materials. One of its applications is the production of polymeric ultrafiltration membranes, which can ... -
Hydrothermal stability of microfibrillated cellulose
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 06.09.2019)The aim of this study was to investigate the effects of hydrothermal treatment on microfibrillated cellulose (MFC). MFC gels were prepared by fibrillating never-dried kraft and dissolving pulps pretreated with endoglucanase. ... -
Ligno-cellulose fibre poly(lactic acid) interfaces in biocomposites
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 23.11.2018)Thermoplastic composite materials based on renewable raw materials are promoted globally in various ways. They can be prepared as durable, but biodegradable materials as poly(lactic acid) (PLA) ligno-cellulose composites ... -
Mass transfer modeling in slow-release dissolution and in reactive extraction using experimental verification
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 05.12.2019)In this thesis, models related to mass transfer operations were studied in two cases. One study case was the dissolution of potassium chloride (KCl) particles in water, and another study case was the reactive solvent ...
