Essays about: "teflon"

Showing result 1 - 5 of 15 essays containing the word teflon.

  1. 1. Methods for measuring mercury in gas ebullition from fiber banks : A literature study

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Diana Jonsson; [2021]
    Keywords : Fiber bank; fiber rich-sediment; mercury; contaminants; gas ebullition; pulp-fiber; wood industry; paper industry; environmental toxicity; wood waste;

    Abstract : Mercury contamination is an environmental issue with high priority due to its high toxicity. In addition to the atmospheric deposition, several lakes and rivers in Sweden are contaminated as a result from wood and pulp-fiber industries which stretches back 200 years. READ MORE

  3. 2. Microwave Heat Treatment of Black Liquor for the Degradation of Hemicellulose

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Maja Rydgård; [2020]
    Keywords : lignin; biofuel; black liquor; heat treatment; microwave heating; chemical engineering; kemiteknik; Technology and Engineering; Chemistry;

    Abstract : The largest use of fossil petroleum is the production of fuels. Hence, finding sustainable alter-natives is an important step to reduce the emissions of greenhouse gases. One such alternative is to produce fuel from biomass, such as waste products from agriculture and the forest indus-try. READ MORE

  4. 3. A 3D sliding bearing finite element based on the Bouc-Wen model : Implementation in Abaqus

    University essay from KTH/Bro- och stålbyggnad

    Author : Rémi Lantoine; [2020]
    Keywords : Railway bridge; dynamics; resonance; sliding bridge bearings; finite element; Abaqus; friction; steel; Teflon; PTFE; Bouc-Wen model; friction coefficient; temperature; heating;

    Abstract : As rail transportation is significantly more virtuous than airplanes or cars in terms of greenhousegases emissions, its development is being encouraged in several European countries, includingSweden. In addition, the development of railway lines on which trains can travel at higher speeds ismade in Sweden with the integration of existing infrastructure. READ MORE

  5. 4. Groundwater Flow and Transport Modelling of PFASs in Åkersberga

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Worada Boonraksasat; [2019]
    Keywords : Groundwater modelling; contaminant transport; Visual MODFLOW; MODPATH; MT3DMS; PFASs; AFFFs;

    Abstract : Per- and polyfluoroalkyl substances (PFASs) are a group of man-made organic chemicals that have been commercially used since the 1950s in many consumer products, including impregnated textiles, impregnated paper, nonstick products (e.g., Teflon), cleaning agents, and in firefighting foams. READ MORE

  6. 5. Development of Kraft Lignin and Coating Technique to Prepare Coated Urea Fertilisers with Increased Nutrient Use Efficiency

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Xueyan Xu; [2017]
    Keywords : fertilizer coating; lignin; modified lignin; polylactide; slow release; ytbeläggning för gödningsmedel; lignin; modifierad lignin; polylaktid; kontrollerad frisättning;

    Abstract : Coating urea to prepare controlled release N-fertilizer has been considered as an effective way to increase its nutrient use efficiency, thus reduce its waste and the consequent harmful environmental impacts. Inorganic sulphur and synthetic polymers have been used in the industry as coating materials together with utilization of various types of expensive coating equipment which commonly requires also complicated technical setup and controls. READ MORE