Essays about: "Particle size distribution"

Showing result 1 - 5 of 75 essays containing the words Particle size distribution.

  1. 1. A detailed study of auroral fragments

    University essay from Uppsala universitet/Institutionen för fysik och astronomiUppsala universitet/Institutet för rymdfysik, Uppsalaavdelningen

    Author : Joshua Dreyer; [2019]
    Keywords : aurora; fragments; Svalbard; all-sky camera; MSP; ASK; EISCAT;

    Abstract : Aurora occurs in various shapes, one of which is the hitherto unreported phenomenon of auroral fragments. For three periods of occurrence of these fragments their properties were studied in detail during this master’s thesis, using mainly ground-based instrumentation located near Longyearbyen on Svalbard, Norway. READ MORE

  2. 2. Experimental Study to Reduce CO Emissions in Skellefteå Kraft's 16 MW Bubbling Fluidized Bed Boiler

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : William Johansson; [2019]
    Keywords : ;

    Abstract : Skellefteå Kraft has had high CO emissions problems in a bubbling fluidized bed (BFB) boiler in Malå.Statistical emissions data from 2013 to 2019 shows plant average emissions of 1230 ppm. Thisexceeds the recommended 440 ppm (6 % O2) that Naturvårdsverket proposes (Naturvårdsverket,2005). READ MORE

  3. 3. The fate of pebbles and planetesimals entering protoplanetary envelopes

    University essay from Lunds universitet/Astronomi

    Author : Emil Zadera; [2019]
    Keywords : Planet formation; planet; protoplanet; protoplanetary envelope; protoplanetary atmosphere; protoplanetary growth; planetary growth model; accretion rate; vapour blob; vapourblob; vapour planet; transport of water; water on planet; pebbles; planetesimals; pebble accretion; planetesimal accretion; meteors; ablation; fragmentation; sublimation; protoplanetary disk; MMSN; accretion window; accretion channel; accretion; destruction; disruption; terminal velocity; gas; gasflow; shearingbox; exoplanet; Physics and Astronomy;

    Abstract : Planetary embryos grow by the accretion of solid dust-material, ranging from cm- to m-sized pebbles up to km-sized planetesimals. However, the underlying size-distribution of the accreted material is poorly understood. READ MORE

  4. 4. Fabrication and Evaluation of Perovskite LaCrO3 Nanoparticles as Catalyst for Electrochemical Ammonia Synthesis

    University essay from Lunds universitet/Institutionen för Energivetenskaper

    Author : Mathilda Ohrelius; [2019]
    Keywords : nitrogen reduction reaction; electrochemical ammonia synthesis; catalyst; perovskite; LaCrO3; fuel cell; renewable energy; Science General;

    Abstract : As our way of living exploits the resources of the earth and our energy use keeps on increasing, we are now facing a climate crisis never seen before in modern time. To face these consequences and try to ease the harm we need to transform our extraction and use of energy. READ MORE

  5. 5. Effect of Unit Operations on Food Particles – Evaluated by image analysis and correlated with mechanical tests

    University essay from Lunds universitet/Förpackningslogistik

    Author : Jan Roland Molina; Nuti Hutasingh; [2019]
    Keywords : Particle breakage; Mechanical test; Image analysis; Unit Operation; Bio-yield test; Technology and Engineering; Agriculture and Food Sciences;

    Abstract : In order to successfully produce food products containing less damaged particles (approx. 1 cm3) it is important to investigate at which limit that the particle could be subjected to processing. This study attempted to predict particle breakage using mechanical test with image analysis as method validation. READ MORE