Selaus nimekkeen mukaan kokoelmassa 2 Tekniikka
Viitteet 41-60 / 160
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Experimental and discrete element simulation studies of bell-less charging of blast furnace
(Åbo Akademi - Åbo Akademi University, 15.03.2013)This thesis presents an experimental study and numerical study, based on the discrete element method (DEM), of bell-less charging in the blast furnace. The numerical models are based on the microscopic interaction between ... -
Experimental and Numerical Analysis of Blast Furnace Drainage
(Åbo Akademi - Åbo Akademi University, 18.03.2022)The thesis studies slag and iron flow in the blast furnace hearth and the complex hearth drainage phenomena by both experiments and numerical simulation. It also presents a mathematical model by which the asymptotic state ... -
Experimental and Numerical Studies of Burden Layers at Blast Furnace Charging
(Åbo Akademi - Åbo Akademi University, 21.10.2022)The blast furnace (BF) is the main production unit in the processing of iron ore to molten iron (“hot metal”) in the steelmaking industry. It is a large process with huge throughput and energy consumption, so even a slight ... -
Extraction of polymeric galactoglucomannans from spruce wood by pressurized hot water
(Åbo Akademi - Åbo Akademi University, 23.08.2013)The major type of non-cellulosic polysaccharides (hemicelluloses) in softwoods, the partly acetylated galactoglucomannans (GGMs), which comprise about 15% of spruce wood, have attracted growing interest because of their ... -
Features of a Ziegler-Natta catalyst prepared with the Sirius emulsion-based catalyst production technology
(Åbo Akademi - Åbo Akademi University, 14.06.2013)- -
Fibre surface engineering using polysaccharide derivatives
(Åbo Akademi - Åbo Akademi University, 12.12.2017)In the search for new materials and innovative solutions, pulp fibres obtained from wood chips have gained attention during the last few decades because they can be converted into a wide variety of pulp-derived products. ... -
Flexible pigment-cellulose nanofibril composites for printed electronics applications
(VTT Technical Research Centre of Finland Ltd, 27.10.2017)The aim of this work was to expand the possibilities of novel use of cellulose micro- and nanofibrils (CMNF) for bio-based composites. The new approach in this work was to combine inorganic pigments and CMNF in a relatively ... -
Formic acid fractionation of bamboo and valorization of isolated lignin
(Åbo Akademi - Åbo Akademi University, 14.02.2020)Lignocellulosic biomass is the most abundant and renewable natural resource on earth. It has been regarded as an environmentally sustainable raw material to be converted into chemicals and biomaterials. To profitably use ... -
Fractionation of marine algae to its constituents towards valuable chemicals and energy products
(Åbo Akademi - Åbo Akademi University, 20.11.2017)There is an urgency for finding renewable resources for the replacement of fossil resources aiming at more environmentally friendly processing. The old concept of processing forestry biomass for pulp and paper that dominated ... -
Functional cellulose microspheres for pharmaceutical applications
(Åbo Akademi - Åbo Akademi University, 13.02.2015)Dissolving cellulose is the first main step in preparing novel cellulosicmaterials. Since cellulosic fibres cannot be easily dissolved in water-based solvents, fibres were pretreated with ethanol-acid solution prior to the ... -
Functionalisation of spruce O-acetyl-galactoglucomannans for barrier and composite applications
(Åbo Akademi - Åbo Akademi University, 23.10.2015)The increasing use of energy, food, and materials by the growing population in the world is leading to the situation where alternative solutions from renewable carbon resources are sought after. The growing use of plastics ... -
Functionalization of cellulosic fibers via adsorption of native and light-responsive polysaccharides
(Åbo Akademi - Åbo Akademi University, 17.01.2018)Pulp fibers are widely used in different types of everyday products. Even though the demand for newspaper and printing paper is declining, there is a clear growth in the consumption of such fiber-based products as specialty ... -
Green aviation fuel hydrocarbons from lignocellulosic biomass via hydrothermal liquefaction
Acta technologiae chemicae Aboensia :2021 A/1 (Åbo Akademi University, 21.05.2021)Hydrothermal liquefaction (HTL) of lignocellulosic biomass in primary alcohols is a novel thermochemical method to produce sustainable aviation fuel range cyclic hydrocarbons. In this method, particularly the underutilized ... -
Heterogeneous catalytic copolymerization reactions of carbon dioxide and propylene oxide over polyalcohols under subcritical conditions
(Åbo Akademi University and Universidad de Valladolid, Spain, 15.03.2017)Carbon dioxide (CO2) is one of the main gases which cause the greenhouse effect. As a way to attenuate this damage, CO2 could be used as a building block for copolymerization reactions; precisely as C1 feedstock (monomer ... -
High-throughput Processing of Nanocelluloses into Barrier Coatings : A Focus on Nanocellulose Rheology and Multilayer Barrier Properties
(Åbo Akademi - Åbo Akademi University, 22.03.2024)Packaging is an integral part of our modern lives, especially in our interconnected world where nearly all products require some form of packaging. The global packaging market is currently valued at 1 trillion USD, with a ... -
Hybridization of pulp fibres with LDH for applications in composites and lightweight fibrous foam
(Åbo Akademi - Åbo Akademi University, 11.08.2017)The research around the pulp and paper (P&P) sector has changed dramatically during the past 15 years. P&P industry is particularly keen to find new solutions for the raw-materials they provide as well as explore novel ... -
Hydrodeoxygenation of Lignin-Derived Model Compound for Sustainable Aviation Fuel Production Using Bifunctional Catalysts
Acta technologiae chemicae Aboensia : 2023 A/5 (Åbo Akademi - Åbo Akademi University, 26.01.2024)The development for sustainable and renewable fuels is driven by the current reliance on fossil fuels and a need to reduce contaminant gas emissions and adhere to climate-related regulations. The main challenge for the ... -
Hydrogen Peroxide as Green Oxidant : Mechanistic Insight in the Direct Synthesis and Application
(Åbo Akademi - Åbo Akademi University, 14.07.2023)In recent years the need to lower the environmental impact of chemical processes and the reduction of the reliance of non-renewable raw materials have been in the focus of academic and industrial research to battle and ... -
Hydrogenation of L-arabinose, D-galactose, D-maltose and L-rhamnose
(Åbo Akademi - Åbo Akademi University, 04.05.2012) -
Hydrotropic process for green biorefinery applications
(Åbo Akademi - Åbo Akademi University, 19.01.2018)Biorefinery is a concept of sustainable biomass processing into several useful products, such as fuels, materials, power and chemicals. The necessity of more extensive biomass utilization is governed nowadays by the ...