Sökning: "Adsorbents"

Visar resultat 1 - 5 av 75 avhandlingar innehållade ordet Adsorbents.

1. 1. Molecular filtration : the study of adsorbents

   Författare :Ebenezer Twumasi; Christer Sjöström; Paolo Tronville; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adsorbents; activated carbon; alumina; MgCa-silica; carbon-silica composite; characterization; porous parameters; molecular filtration; Other civil engineering and architecture; Övrig samhällsbyggnadsteknik och arkitektur;

   Sammanfattning : Adsorbent materials for gas purification have been studied and developed for application in many areas. It is known that a single adsorbent may not adequately control multiple contaminants. Therefore, the development of adsorbent materials has accelerated over the past two decades, and is today an area attracting a lot of attention. LÄS MER

3. 2. Structured zeolite adsorbents

   Författare :Alessandra Mosca; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Technology; Kemisk teknologi;

   Sammanfattning : Zeolites are microporous crystalline aluminosilicates with unique properties, and therefore used in adsorption processes, for membrane separation, in catalysis, and in sensor technologies. Pressure swing adsorption (PSA) is a commonly used technology for purifying gases and is based on the ability of materials like zeolites, to selectively adsorb and desorb particular gas molecules as the gas pressure is increased and reduced, respectively. LÄS MER

4. 3. Zeolite adsorbents and catalysts for the recovery and production of biochemicals

   Författare :Abrar Faisal; Mattias Grahn; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zeolites; Adsorbents; Catalyst; Butanol; Arginine; ZSM-5; Chemical Technology; Kemisk teknologi;

   Sammanfattning : Fossil based energy resources are dominating the world’s primary energy consumption for the last century. However, with decreasing crude oil reservoirs and the role they play in global warming by emitting greenhouse gases, the focus has been turned towards improved utilization of renewable resources and the need for new, sustainable fuels and chemicals is more urgent than ever. LÄS MER

5. 4. Volatile metabolites from microorganisms in indoor environments : sampling, analysis and identification

   Författare :Anna-Lena Sunesson; Alvin Fox; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Adsorbents; Analysis; Cultivation; Determination; Gas chromatography; Identification; Indicator substances; Indoor air; Mass spectrometry; Metabolites; Microbial volatile organic compounds; Optimization; Sampling; Sick buildings; Thermal desorption; Aspergillus versicolor; Cladosporium cladosporioides; Paecilomyces variotii; Pénicillium commune; Phialophora fastigiata; Streptomyces albidoflavus;

   Sammanfattning : Microorganisms are able to produce a wide variety of volatile organic compounds. This thesis deals with sampling, analysis and identification of such compounds, produced by microorganisms commonly found in buildings. LÄS MER

7. 5. Preparation and Evaluation of New Nanoporous Silica Materials for Molecular Filtration and for Core Materials in Vacuum Insulation Panels

   Författare :Ebenezer Twumasi Afriyie; Folke Björk; Christer Sjöström; Kjartan Gudmundsson; Per Jostein Hovde; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Adsorbents; activated carbon; MgCa-silica; carbon-silica composite; characterization; porous parameters; molecular filtration; thermal conductivity; thermal insulation;

   Sammanfattning : Nanoporous materials for gas purification and thermal insulation have been studied and developed for application in many areas. It is known that a single adsorbent may not adequately control multiple contaminants. Further the utilization of nanoporous material as thermal insulator in building applications is limited due to high cost. LÄS MER