Sökning: "Acid washing"

Visar resultat 1 - 5 av 23 uppsatser innehållade orden Acid washing.

  1. 1. Reprocessing and Characterization of Polybenzimidazole for High-Temperature Polymer Electrolyte Membrane Fuel Cells

    Master-uppsats, Lunds universitet/Centrum för analys och syntes

    Författare :Douglas Björkengren; [2023]
    Nyckelord :polymer electrolyte membrane fuel cells; PEMFC; HTPEMFC; polymer technology; polymer characterization; reprocessing; recycling; polybenzimidazole; PBI; Technology and Engineering;

    Sammanfattning : A reprocessing method of poly(2,2’-(m-phenylene)-5,5’-bibenzimidazole) (PBI) membranes recovered from the production line of High-Temperature Polymer Electrolyte Membrane Fuel Cells (HT-PEMFC) at Blue World Technologies (BWT) has been developed in order to reduce material loss in the production. Redissolution of scrap PBI membranes in poly(phosphoric acid) (PPA) and phosphoric acid (PA) was successful and the subsequent washing procedure produced PBI that could be redissolved in N,N-dimethyl acetamide (DMAc) and suitable for solution casting of new membranes. LÄS MER

  3. 2. Developing an Environmentally Friendly Approach for Ash Removal in Hard Carbon Anodes

    Master-uppsats, KTH/Materialvetenskap

    Författare :Diwen Wang; [2023]
    Nyckelord :Hard carbon; Acid wash; Biochar; Sodium-ion battery; Hårt kol; Syratvätt; Biokol; Natriumjonbatteri;

    Sammanfattning : Hard carbon is regarded as one of the most promising anode materials for sodium-ion battery. However, the ash content of the hard carbon anode inherited from the precursor have several negative impacts on the electrochemical performance of hard carbon. LÄS MER

  4. 3. Purification of Engineered Graphite for Advanced Application

    Master-uppsats, KTH/Materialvetenskap

    Författare :Lingfeng Zhao; [2022]
    Nyckelord :Graphite; Purification; Acid washing; Biomass; Biochar;

    Sammanfattning : Graphite has important applications in several key industries, which has been listed as a “criticalraw material” considered to be supply-risk by European since 2020. Purification of engineered graphite is one of the essential processes for the manufacturing of high-quality graphite. LÄS MER

  5. 4. Energieffektivisering av membranluftrengöring vid högflödesperioder : Studie på en storskalig MBR-pilot på Syvab Himmerfjärdsverket i samarbete med SUEZ Water Technologies and Solutions

    Master-uppsats, Karlstads universitet

    Författare :Patrik Bou-Rached; [2022]
    Nyckelord :MBR; membrane air scouring; trans membrane pressure; luftflöde; membranluftrengöring; transmembrantryck;

    Sammanfattning : Membrane BioReactor (MBR) is a wastewater treatment method which combine both biological and physical cleaning. In the membrane tank there is membrane fibres which physically separate wastewater from containing organic material. This causes the membrane fibres to easily build fouling. LÄS MER

  7. 5. Evaluation of using bioplastics for lab consumables

    Kandidat-uppsats, Uppsala universitet/Institutionen för materialvetenskap

    Författare :Lovisa Mäepea Nilsson; Emelie Gunnarsson; Sara Mardini; Fartun Nuur Yusuf; Jesper Nyström; [2022]
    Nyckelord :bioplastics; Biotage; sustainability; green washing; biopolymers; PLA; bio-based; environment; PHA; PP; PE; chemical properties; bioplaster; hållbarhet; bio-polymerer; bio-baserad; miljövänlig;

    Sammanfattning : The use of plastic has increased markedly in recent years which has led to more fossil fuels being used and more plastic in nature. This is a literature study that researches on how bio- based plastics can be used instead of plastics made from fossil fuels. LÄS MER