Essays about: "Acid washing"

Showing result 1 - 5 of 20 essays containing the words Acid washing.

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

   University essay from Lunds universitet/Centrum för analys och syntes

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

   Abstract : 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. READ MORE

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

   University essay from KTH/Materialvetenskap

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

   Abstract : 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. READ MORE

4. 3. Purification of Engineered Graphite for Advanced Application

   University essay from KTH/Materialvetenskap

   Author : Lingfeng Zhao; [2022]
   Keywords : Graphite; Purification; Acid washing; Biomass; Biochar;

   Abstract : 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. READ MORE

5. 4. Evaluation of using bioplastics for lab consumables

   University essay from Uppsala universitet/Institutionen för materialvetenskap

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

   Abstract : 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. READ MORE

6. 5. Wet Spinning of Lignin and Cellulose Precursor Fibers Using Cold Sodium Hydroxide Dissolution

   University essay from KTH/Fiber- och polymerteknologi

   Author : Nazariy Voytyuk; [2022]
   Keywords : Alkaline Dissolution; Cold Alkali Process; Lignin; Precursor Fibers; Wet spinning; Alkalisk upplösning; Kall alkaliprocess; Lignin; Prekursorfibrer; Våtspinning;

   Abstract : Användningen av cellulosa och lignin för prekursorfibrer (PF) för kolfibrer (CF) är ett mycket intressant forskningsområde på grund av den stora miljöpåverkan som dagens PF-fossilbaserade råvara PAN har. Denna avhandling fokuserar på att utveckla PF med ett kallt NaOH-upplösningssystem med cellulosakoncentrationer från 4,5 till 5,5 viktprocent med varierande massaviskositet och tillsats av lignin från 0-40 viktprocent jämfört med cellulosa. READ MORE