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Adsorption of rare earth elements on novel “Mg-Al layered double hydroxide with gum arabic”
(2018)
In the last few decades, the demand for rare earth elements has increased, as there have been further discoveries for their use. Rare earth elements are used for very specific applications and can be extracted from different ...
Kiertokaasukompressorin monitorointi simulointimallilla
(2018)
Työn tavoitteena on selvittää Nesteen Porvoon jalostamolla olevan vetykrakkaus-yksikön (VK) kiertokaasukompressorin toimintapiste, sekä tutkia mittalevyillä tehtävän virtausmittauksen virhearviota. Kompressorin toimintapisteen ...
Kuituhampun vaikutus taivekartongin fysikaalisiin ominaisuuksiin
(2018)
Non-wood-kuituja on käytetty paperin valmistuksessa jo tuhansia vuosia. Ensimmäiset paperit valmistettiin muun muassa pellavasta, hampusta ja oljesta. Puun kuidutusmenetelmien kehittymisen myötä on non-wood-kuitujen ...
Techno-economic analysis (TEA) tool for NOx mitigation solutions
(2018)
Tight NOx limits set by the regulatory authorities have necessitated the suppliers of NOx removal technologies to consider the cost-effective alternatives for their industrial customers. The objective of the master thesis ...
Model-based design and optimisation of hydrometallurgical liquid–liquid extraction processes
(Lappeenranta University of Technology, 2018-11-12)
Hydrometallurgical methods are suitable for the treatment of primary, secondary, highand low-grade raw materials enabling the production of metals essential to modern society, in an environmentally and economically sustainable ...
Novel treatment methods for green liquor dregs and enhancing circular economy in kraft pulp mills
(Lappeenranta University of Technology, 2018-12-17)
Green liquor dregs (GLD) are known to be the largest fraction of inorganic residue in the kraft pulping process, or even in virgin pulp production. GLD originates from the chemical recovery cycle where effective cooking ...
Enzyme recovery with microfiltration : effect of spacer size and improvement of membrane cleaning
(2018)
Purpose of this master’s thesis work was to improve enzyme recovery and cleaning protocol of microfiltration process at Genencors plant in Jämsänkoski. Also, waste streams produced were evaluated. Literature review of this ...
Towards sustainable production of value-added chemicals and materials from lignocellulosic biomass: carboxylic acids and cellulose nanocrystals
(Lappeenranta University of Technology, 2018-11-02)
Industrial production of many chemicals and chemical products depends primarily on fossil resources. Lignocellulosic biomass, which is the most abundant and sustainable biomass on earth, is a potential renewable resource ...
Böömiitin saostaminen kokoekskluusiokromatografian avulla
(2018)
Bayer-prosessin energiankulutuksen vähentämiseksi saostetaan gibbsiitin (Al(OH)3) sijasta alumiinihydroksidia nimeltä böömiitti (AlOOH) ylikylläisestä natriumaluminaattiliuoksesta. Böömiitin saostukseen vaikuttavat ...
Assessment and improvement of wastewater system in Pilot plant
(2019)
Aim of this master’s thesis was to study most efficient separation methods for wastewater produced by plastic company. Especially, there has been contaminants in Pilot plant wastewater. The main contaminants in wastewater ...