Essays about: "Kappatal"

Found 5 essays containing the word Kappatal.

1. 1. Quantitative and qualitative analysis of dyes in pulp from recycled textiles

   University essay from KTH/Fiber- och polymerteknologi

   Author : Anna Bevin; [2023]
   Keywords : Textile fibers; Dyes; Kappa number; FTIR; UV-VIS; Textilfibrer; Färgämnen; Kappatal; FTIR; UV-VIS;

   Abstract : To decrease the environmental footprint, the textile industry needs to become more circular. One company that is trying to close the textile lifecycle loop is the Swedish company Renewcell. In the Renewcell process, discarded clothes and other textile waste are turned into a dissolving pulp that can be used for production of new textiles. READ MORE

3. 2. Development of pulp fiber charge in oxygen delignification of softwood

   University essay from KTH/Fiber- och polymerteknologi

   Author : Jiahao Mai; [2021]
   Keywords : fiber; fiber charge; fine content; oxygen delignification; softwood; fiber; fiberladdning; finmaterial; syrgasdelignifiering; barrved;

   Abstract : Esteves et.al. 2020 visade att syrgasdelignifiering ökar den totala fiberladdningen men leder inte alltid till ökad pappersstyrka. Denna studie syftar till att undersöka hur fiberladdning påverkar massans egenskaper. READ MORE

4. 3. The Effect of Calcium on Delignification in Kraft Cooking of Eucalyptus

   University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Author : Eashwara Raju Senthilkumar; [2019]
   Keywords : Delignification; Carbohydrates; Lignin; Yield; Calcium; Delignifiering; Kolhydrater; Lignin; Utbyte; Kalcium;

   Abstract : Delignifiering under sulfat koket innefattar både kemisk nedbrytning och fysisk upplösning av lignin, för vilket närvaron av oorganiska salter, oorganiska anjoner samt oorganiska katjoner (sammantaget benämnda som "Non-process elements", NPEs på engelska) kan ha inverkan på delignifieringens hastighet. Tidigare studier har funnit att ved med högt kalciuminnehåll är svårdelignifierad och att kalcium har potentiell inverkan på ligninlöslighet och kappatal. READ MORE

5. 4. Steaming of Wood Chips - Experimental determination of heating times and effect of different parameters

   University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Author : Henrik Broberg; [2019]
   Keywords : ;

   Abstract : The presteaming of wood chips is an important step in the chemical pulping industry. It removes the air from within wood chips, allowing the cooking liquor to better impregnate wood chips, which leads to a more uniform cooking process, and lowers the amount of rejects. READ MORE

6. 5. The Effect of Different Xylan Contents on the Strength Properties of Softwood Kraft pulp

   University essay from Karlstads universitet/Fakulteten för teknik- och naturvetenskap

   Author : Maria Svedinger Andersson; [2013]
   Keywords : Xylan; Glucomannan; strength; pulp; cooking; xylan content; hemucellulose; mild cook;

   Abstract : The aim of this Master thesis was to investigate if the xylan content had any influence on the physical properties of softwood kraft pulps. To achieve pulps with different xylan content different kraft cooking conditions were used; two different temperatures and two different effective alkali levels. READ MORE