Browsing NTNU Open by Author "Hemmen, Henrik"

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    • Experimental Studies of Smectite Clays: Colloids and Nanoporous Materials 

      Hemmen, Henrik (Doktoravhandlinger ved NTNU, 1503-8181; 2012:215, Doctoral thesis, 2012)
      This thesis presents experimental work on two synthetic clay minerals: fluorohectorite and Laponite RD. Both are hectorite clays belonging to the widely studied smectite group of clays. The results presented can broadly ...

    • 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, ...

    • Swelling transition of a clay induced by heating 

      Hansen, Elisabeth Lindbo; Hemmen, Henrik; Fonseca, Davi de Miranda; Coutant, C.; Knudsen, Kenneth; Plivelic, T; Bonn, D; Fossum, Jon Otto (Journal article; Peer reviewed, 2012)
      Clays are of paramount importance for soil stability, but also in applications ranging from oil recovery to composites and hydrogels. Generically, clays are divided into two subclasses: macroscopically swelling, ‘active’ ...

    • The Frederiks transition in an aqueous clay dispersion 

      Hemmen, Henrik; Hansen, Elisabeth Lindbo; Ringdal, Nils Ivar; Fossum, Jon Otto (Journal article; Peer reviewed, 2012)
      We show that under certain circumstances, aqueous dispersions of Na-fluorohectorite synthetic clay display transient spatially periodic structures when subjected to magnetic fields. These nematic structures result from the ...

    • X-ray Studies of Carbon Dioxide Intercalation in Na-Fluorohectorite Clay at Near-Ambient Conditions 

      Hemmen, Henrik; Rolseth, Erlend G.; Fonseca, Davi de Miranda; Hansen, Elisabeth Lindbo; Fossum, Jon Otto; Plivelic, T (Journal article, 2012)
      We show experimentally that gaseous CO2 intercalates into the interlayer space of the synthetic smectite clay Na-fluorohectorite at conditions not too far from ambient. The mean interlayer repetition distance of the clay ...