Sökning: "Black liquor"

Visar resultat 21 - 25 av 39 uppsatser innehållade orden Black liquor.

1. 21. De-polymerization and Purification of Kraft Lignin Utilizing the Liquid-Lignin Phase

   Master-uppsats, Lunds universitet/Kemiteknik (CI)

   Författare :Martin Sundin; [2017]
   Nyckelord :ALPHA; SLRP; Liquid-Lignin; Lignin; Technology and Engineering;

   Sammanfattning : The effects of global warming are apparent and the work towards a sustainable future is underway. In order to reduce the environmental impact caused by the transportation sector, a transition from fossil fuels to those based on renewable resources are important. Using agricultural land to produce raw materials, e.g. LÄS MER

3. 22. Hydrogen Assisted Lignin Depolymerization with Pulp Mill Catalysts

   Master-uppsats, Lunds universitet/Kemiteknik (CI)

   Författare :Linnéa Kollberg; [2017]
   Nyckelord :Lignin; depolymerization; pulp mill catalysts; hydrogenolysis; base catalyzed depolymerization; Chemistry;

   Sammanfattning : As part of the development of a process for production of a lignin-rich oil that can serve as a renewable feedstock to existing petroleum refineries, hydrogen assisted depolymerization of lignin in filtered black liquor has been investigated. This process offers the possibility to reduce fossil emissions from transportation by utilization of the largest renewable carbon resource in Sweden, namely the forest. LÄS MER

4. 23. The Influence of Xylan on Precipitation and Filtration Properties of Lignin : A Study in the Context of the LignoBoost Process

   Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

   Författare :Helen Schneider; Lynn Schneider; [2016]
   Nyckelord :Xylan; Lignin; Precipitation; FBRM; LignoBoost process;

   Sammanfattning : The LignoBoost process is a valuable supplement to the Kraft process. It can increase the pulp production rate of a Kraft mill and it enables lignin separation from black liquor with a high degree of purity. However, residual xylan in black liquor has been observed to increase filtration resistance of lignin during the LignoBoost process. LÄS MER

5. 24. Catalytic Hydrothermal Liquefaction of Waste Sludge : A Pre-study with Model Compounds

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Petter Lundqvist; [2016]
   Nyckelord :Hydrothermal; liquefaction; waste sludge; black liquor;

   Sammanfattning : The use and research of renewable fuels has become more important due to the connection between climate changes and the use of fossil fuels. With risks of decline in petroleum production derived from fossil fuels due to limitation of resources in the future, the renewable fuels are even more important in the transport sector. LÄS MER

7. 25. Evaluation of the potential for co-gasification of black liquor and biofuel by-products : An experimental study of mixing and char reactivity

   Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

   Författare :Gustav Häggström; [2015]
   Nyckelord :gasification; co-gasification; black liquor; crude glycerol; fermentation residue; förgasning; samförgasning; svartlut; råglycerol; fermentationsrest;

   Sammanfattning : The increased use of fossil fuels during the last centuries has caused elevated levels of carbon dioxide in the atmosphere. There is significant evidence that this is the cause of global warming. To mitigate the global warming, measures has to be taken to use renewable fuels and make processes more efficient. LÄS MER