Sökning: "recycling"

Visar resultat 6 - 10 av 563 avhandlingar innehållade ordet recycling.

1. 6. Granulation and recycling of polymers

   Författare :Toni Reftman; Industriell Produktion; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; materialteknik; Materiallära; Material technology; akustik; vibrationer; vakuumteknik; granulation; granulators; recycling; size reduction; cutting resistance; hydraulics; Mechanical engineering; vacuum technology; vibration and acoustic engineering; hydraulik; Maskinteknik; Polymer technology; biopolymers; Polymerteknik;

   Sammanfattning : The use of polymers and composite materials based on polymer matrix systems increases. With this raise the demands on recycling of both post-consumer and in house based material increase. The demands on the recycling process also increase. The reason is that the process more often has to be a part of the conventional production line. LÄS MER

3. 7. Designing out waste - Exploring barriers for material recirculation

   Författare :Isabel Ordonez Pizarro; Chalmers tekniska högskola; []
   Nyckelord :HUMANIORA; HUMANITIES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; waste sorting; sustainable development; Water; Waste; Urban; waste management; Resources; resource recovery; ​Recycling; designing with waste; recycling;

   Sammanfattning : This doctoral thesis has investigated what hinders material recirculation in society, to later suggest possible ways to support material recirculation in the future. Since material recirculation is proposed as a way to use waste materials for new production, it was deemed relevant to investigate two separate case studies that enabled recirculation from production systems and waste management. LÄS MER

4. 8. Carbon materials: towards a circular economy through thermochemical recycling of mixed waste

   Författare :Isabel Cañete Vela; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; plastic waste; circular economy; thermochemical recycling; mixed waste; recycling; Carbon materials; steam cracking;

   Sammanfattning : Carbon-containing materials, such as paper, wood, plastic, and textiles, are essential for our daily lives, being used in everything from clothing to infrastructure. However, their use typically follows a linear pattern, in that we extract carbon resources, create products, and eventually dispose of them, thereby contributing to greenhouse gas (GHG) emissions throughout the supply chain. LÄS MER

5. 9. Sustainable recycling of Li-ion batteries

   Författare :Jędrzej Piątek; Adam Slabon; Tetyana Budnyak; Reza Younesi; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; batteries; recycling; metal recovery; adsorption; electrochemistry; oorganisk kemi; Inorganic Chemistry;

   Sammanfattning : Lithium-ion batteries (LIBs) play a key role in today’s energy storage sector, finding applications in everyday use electronic devices, like smartphones, laptops or electric vehicles. Despite very good properties, such as high electric capacity and high number of charge-discharge cycles, eventually each battery in the world will be disposed and stored in a landfill, waiting for the opportunity to be recycled. LÄS MER

7. 10. Development and Studies of the Processes Involved in Minor Enantiomer Recycling

   Författare :Anna Laurell Nash; Christina Moberg; Karl Anker Jørgensen; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; asymmetric catalysis; biocatalysis; cyanohydrins; dual activation; Lewis acid; Lewis base; minor enantiomer recycling; recycling; titanium; Kemi; Chemistry;

   Sammanfattning : This thesis describes the development and rationalization of processes involved in a new methodology developed in our group, minor enantiomer recycling.The first part of the thesis addresses mechanistic studies of one of the reactions involved in minor enantiomer recycling, dual Lewis acid-Lewis base catalyzed acetylcyanation of aldehydes. LÄS MER