Browsing NTNU Open by Author "Knudsen, Kenneth Dahl"

Now showing items 1-14 of 14

    • A nano-silicate material with exceptional capacity for CO2 capture and storage at room temperature 

      Cavalcanti, Leide Passos; Kalantzopoulos, Georgios N.; Eckert, J.; Knudsen, Kenneth Dahl; Fossum, Jon Otto (Journal article; Peer reviewed, 2018)
      In order to mitigate climate change driven by the observed high levels of carbon dioxide (CO2) in the atmosphere, many micro and nano-porous materials are being investigated for CO2 selectivity, capture and storage (CCS) ...

    • CO2 Adsorption Enhanced by Tuning the Layer Charge in a Clay Mineral 

      Hunvik, Kristoffer William Bø; Loch, Patrick; Wallacher, Dirk; Kirch, Alexsandro; Cavalcanti, Leide Passos; Rieß, Martin; Daab, Matthias; Josvanger, Vegard; Grätz, Sven; Yokaichiya, Fabiano; Knudsen, Kenneth Dahl; Miranda, Caetano Rodrigues; Breu, Josef; Fossum, Jon Otto (Peer reviewed; Journal article, 2021)
      Due to the compact two-dimensional interlayer pore space and the high density of interlayer molecular adsorption sites, clay minerals are competitive adsorption materials for carbon dioxide capture. We demonstrate that ...

    • Dipolar ordering of clay particles in various carrier fluids 

      Rozynek, Zbigniew; Mauroy, Henrik; Castberg, Rene; Knudsen, Kenneth Dahl; Fossum, Jon Otto (Journal article; Peer reviewed, 2012)
      We investigate here examples of complexity in composite materials. The objective of the paper is to show that clay particles can be aligned in different hosting media, such as: silicone oil, paraffin-wax, polystyrene and ...

    • High concentration aqueous magnetic fluids: structure, colloidal stability, magnetic and flow properties 

      Vasilescu, Corina; Latikka, M.; Knudsen, Kenneth Dahl; Garamus, Vasil M.; Socoliuc, V.; Turcu, Rodica; Tombácz, Etelka; Susan-Resiga, Daniela; Ras, R.H.A.; Vékás, L. (Journal article; Peer reviewed, 2018)
      This paper is an in-depth analysis devoted to two basic types of water based magnetic fluids (MFs), containing magnetite nanoparticles with electrostatic and with electro-steric stabilization, both obtained by chemical ...

    • The Impact of Thermal History on Water Adsorption in a Synthetic Nanolayered Silicate with Intercalated Li+ or Na+ 

      Michels Brito Miranda, Leander Edward; Fonesca, C. L. S. da; Méheust, Y.; Altoé, M. A. S.; Santos, E. C. dos; Grassi, G.; Droppa Jr., R.; Knudsen, Kenneth Dahl; Cavalcanti, Leide Passos; Hunvik, Kristoffer William Bø; Fossum, Jon Otto; Silva, G.J. da; Bordallo, H. N. (Peer reviewed; Journal article, 2020)
      For applications benefitting from the swelling properties of nanolayered silicates (clay minerals), it is of paramount importance to understand the hysteresis in the clay–water interaction. In this context, the present ...

    • Influence of CO2 on Nanoconfined Water in a Clay Mineral 

      Hunvik, Kristoffer William Bø; Lima, Rodrigo José Da Silva; Kirch, Alexsandro; Loch, Patrick; Monceyron Røren, Paul; Hoffmann Petersen, Martin; Rudić, Svemir; García Sakai, Victoria; Knudsen, Kenneth Dahl; Rodrigues Miranda, Caetano; Breu, Josef; Fossum, Jon Otto; Bordallo, Heloisa N. (Peer reviewed; Journal article, 2022)
      Developing new technologies for carbon sequestration and long-term carbon storage is important. Clay minerals are interesting in this context as they are low-cost, naturally abundant, can adsorb considerable amounts of ...

    • Interactions between Asphaltenes and a Model Demulsifier in Bulk and at an Interface Studied by Small-Angle Neutron Scattering (SANS) and Neutron Reflectometry 

      Knudsen, Kenneth Dahl; Simon, Sebastien Charles; Geue, Thomas; Joshaniel F. K., Cooper; Sjøblom, Johan (Peer reviewed; Journal article, 2020)
      This article describes neutron reflectometry to probe the structure of the asphaltene layer adsorbed onto a hydrophilic silicon surface and the interactions between asphaltenes and a model demulsifier (pluronic). To start ...

    • Intercalation and Retention of Carbon Dioxide in a Smectite Clay promoted by Interlayer Cations 

      Michels, Leander; Fossum, Jon Otto; Rozynek, Zbigniew Jerzy; Hemmen, Henrik; Rustenberg, Karin Hveding; Sobas, Pawel Andrzej; Kalantzopoulos, Georgios N.; Knudsen, Kenneth Dahl; Janec, Marian; Plivelic, Tomás S.; da Silva, Geraldo Jose (Journal article; Peer reviewed, 2015)
      A good material for CO2 capture should possess some specific properties: (i) a large effective surface area with good adsorption capacity, (ii) selectivity for CO2, (iii) regeneration capacity with minimum energy input, ...

    • Intercalation of CO2 Selected by Type of Interlayer Cation in Dried Synthetic Hectorite 

      Hunvik, Kristoffer William Bø; Seljelid, Konstanse Kvalem; Wallacher, Dirk; Kirch, Alexsandro; Cavalcanti, Leide Passos; Loch, Patrick; Røren, Paul Monceyron; Michels-Brito, Paulo Henrique; Droppa-Jr, Roosevelt; Knudsen, Kenneth Dahl; Miranda, Caetano Rodrigues; Breu, Josef; Fossum, Jon Otto (Peer reviewed; Journal article, 2023)
      Clay minerals are abundant in caprock formations for anthropogenic storage sites for CO2, and they are potential capture materials for CO2 postcombustion sequestration. We investigate the response to CO2 exposure of dried ...

    • Photonic composite materials from cellulose nanorods and clay nanolayers 

      Trindade, Ana Catarina; Carreto, Miguel; Helgesen, Geir; Knudsen, Kenneth Dahl; Puchtler, Florian; Breu, Josef; Fernandes, Susete; Godinho, Maria Helena; Fossum, Jon Otto (Peer reviewed; Journal article, 2020)
      Cellulose nano crystals (CNCs) are promising materials for energy efficient buildings related to the control of reflectivity and heat absorption/reflection of light. In this sense it is important to improve CNCs films fire ...

    • Physicochemical mechanisms for gas adsorption on clay mineral interfaces and surfaces 

      Hunvik, Kristoffer William Bø (Doctoral theses at NTNU;2020:316, Doctoral thesis, 2020)
      Increasing anthropogenic carbon emissions have a detrimental impact on our planet's ecosystems. If we want to keep our planet habitable for future generations, serious action is needed. We need to both reduce and mitigate ...

    • Sample cell for studying liquid interfaces with an in situ electric field using X-ray reflectivity and application to clay particles at oil-oil interfaces 

      Larsen, Simon R.; Hansteen, Marie; Pacáková, Barbara; Theodor, Keld; Arnold, Thomas; Rennie, Adrian R.; Helgesen, Geir; Knudsen, Kenneth Dahl; Bordallo, Heloisa N.; Fossum, Jon Otto (Journal article; Peer reviewed, 2018)
      Commissioning results of a liquid sample cell for X-ray reflectivity studies with an in situ applied electrical field are presented. The cell consists of a Plexiglas container with lateral Kapton windows for air–liquid and ...

    • Self-Assembly from Functionalized Clay Nanolayers: Nematics and Hybrid Structures 

      Brito, Paulo Henrique Michels (Doctoral theses at NTNU;2021:321, Doctoral thesis, 2021)
      The focus of this Ph.D. thesis is to study functionalization and associated self-assembly of clay mineral in suspensions. Clay minerals are two-dimensional materials. They are among the most abundant, highly sustainable, ...

    • Silicon Nanoparticle Ensembles for Lithium-Ion Batteries Elucidated by Small-Angle Neutron Scattering 

      Lai, Samson Yuxiu; Knudsen, Kenneth Dahl; Sejersted, Benjamin Tjeltveit; Ulvestad, Asbjørn; Mæhlen, Jan Petter; Koposov, Alexey (Journal article; Peer reviewed, 2019)
      Silicon in the form of nanoparticles has attracted significant interest in the field of lithium-ion batteries due to the enormous capability of lithium intake. In the present work we demonstrate the characterization of ...