Essays about: "Kraft Pulping"

Showing result 11 - 15 of 15 essays containing the words Kraft Pulping.

  1. 11. Impact of hardwood black liquor addition on the chemical and physical properties of kraftliner - a lab study

    University essay from Luleå tekniska universitet/Industriell miljö- och processteknik

    Author : Fredrika Sundvall; [2017]
    Keywords : Hardwood black liquor; Xylan; Kraft pulping; Black liquor.;

    Abstract : Kraft pulping, also known as sulphate pulping is a complex process where the wood components are liberated from each other facilitated by chemical reactions. During the pulping process some dissolved and degraded compounds end up together with the spent cooking chemicals in the black liquor. READ MORE

  3. 12. De-polymerization and Purification of Kraft Lignin Utilizing the Liquid-Lignin Phase

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Martin Sundin; [2017]
    Keywords : ALPHA; SLRP; Liquid-Lignin; Lignin; Technology and Engineering;

    Abstract : 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. READ MORE

  4. 13. A study on the thermal stability of sodium dithionite using ATR-FTIR spectroscopy

    University essay from KTH/Fiber- och polymerteknologi

    Author : Vijaya Lakshmi Vegunta; [2016]
    Keywords : Alkalinity; Anaerobic; Decomposition; Heating Temperature; ATR-FTIR spectroscopy; Stability; Sodium dithionite; Sodium hydroxide; Nitrogen gas;

    Abstract : Sodium dithionite (Na2S2O4) is a powerful reducing agent. It has therefore been suggested to be used as an additive in kraft pulping to improve the yield. However, sodium dithionite easily decomposes and it is thus important to determine the effect of different conditions. READ MORE

  5. 14. Effect of raw material and Kraft Pulping Conditions on Characteristics of Dissolved Lignin

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Antonia Svärd; [2014]
    Keywords : Kraft pulping; softwood; eucalyptus; lignin; characterization;

    Abstract : Lignin is one of the main components in wood and during the chemical pulping processes it is degraded and dissolved into the cooking liquor. The current challenge is to meet the need for energy and raw materials, and reform to a more environmentally sustainable society, so there is a great interest in using kraft lignin as a raw material for energy, materials and as source of chemicals. READ MORE

  6. 15. The metal binding properties of kraft lignin

    University essay from Akademin för hållbar samhälls- och teknikutveckling; Institutionen för biologi och kemiteknik

    Author : Johanna Waltersson; [2009]
    Keywords : Lignin;

    Abstract : There is a strong driving force to increase the competitiveness of the pulping industry by finding new business opportunities. In this context full utilisation of the wood raw material used in conventional pulping mills is of vital importance. One focus area is to increase the utilisation areas of lignin. READ MORE