Search for dissertations about: "Polysulphide"

Found 3 swedish dissertations containing the word Polysulphide.

2. 1. The effects of fines content and hydrogen sulphide gas pre-treatment on kraft pulping and the strength of polysulphide pulps

   Author : Elisabet Brännvall; KTH; []
   Keywords : Bleachhability; Delignification; Fines; Hydrogen sulphide pre-treatment; Kraft pulping; Mechanical properties; Polysulphide; Softwood; Yield; NATURAL SCIENCES; NATURVETENSKAP;

   Abstract : .... READ MORE

4. 2. Antimony recovery from complex copper concentrates through hydro- and electrometallurgical processes

   Author : Samuel Ayowole Awe; Olof Forsén; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

   Abstract : Today, one of the major difficulties confronted during copper metallurgy is the elimination of antimony and arsenic impurities from the process. This is because the pure copper ore reserves are becoming exhausted and the resources of unexploited ores often contain relatively high amounts of antimony and arsenic. READ MORE

5. 3. Environmental Assessment of Battery Systems: Critical Issues for Established and Emerging Technologies

   Author : Carl Johan Rydh; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; photovoltaic cells; battery; environmental indicators; substance flow analysis; energy analysis; metal recycling; energy efficiency; materials management; rechargeable; life cycle assessment; renewable energy;

   Abstract : Energy and material flows associated with portable and industrial rechargeable batteries have been quantified in a life-cycle perspective, as guidance for development of battery systems. The study included portable batteries based on nickel-cadmium, nickel-metal hydride and lithium-ion. READ MORE