Browsing NTNU Open by Author "Ugwu, Ambrose"

Now showing items 1-6 of 6

    • An advancement in CO2 utilization through novel gas switching dry reforming 

      Ugwu, Ambrose; Zaabout, Abdelghafour; Amini, Shahriar (Journal article; Peer reviewed, 2019)
      This study is the first experimental demonstration of CO2 capture and utilization for dry methane reforming using a novel chemical looping concept, “Gas Switching Dry Reforming” (GSDR) to produce syngas. The new reactor ...

    • Combined Syngas and Hydrogen Production using Gas Switching Technology 

      Ugwu, Ambrose; Zaabout, Abdelghafour; Donat, Felix; van Diest, Geert; Albertsen, Knuth; Müller, Christoph; Amini, Shahriar (Peer reviewed; Journal article, 2021)
      This paper focuses on the experimental demonstration of a three-stage GST (gas switching technology) process (fuel, steam/CO2, and air stages) for syngas production from methane in the fuel stage and H2/CO production in ...

    • Gas Switching Reforming (GSR) for syngas production with integrated CO2 capture using iron-based oxygen carriers 

      Zaabout, Abdelghafour; Dahl, Paul Inge; Ugwu, Ambrose; Tolchard, Julian R; Cloete, Schalk Willem Petrus; Amini, Shahriar (Journal article; Peer reviewed, 2019)
      The process behavior of a Gas Switching Reforming (GSR) reactor was studied using three different iron-based oxygen carrier materials: Iron-oxide on Alumina, Iron-Nickel oxide on Alumina and Iron-Ceria on Alumina. It was ...

    • Gas Switching Reforming for syngas production with iron-based oxygen carrier-the performance under pressurized conditions 

      Ugwu, Ambrose; Zaabout, Abdelghafour; Tolchard, Julian R; Dahl, Paul Inge; Amini, Shahriar (Journal article; Peer reviewed, 2019)
      A four-stage Gas Switching Reforming for syngas production with integrated CO2 capture using an iron-based oxygen carrier was investigated in this study. The oxygen carrier was first reduced using dry methane, where high ...

    • Hydrogen production by water splitting using gas switching technology 

      Ugwu, Ambrose; Donat, Felix; Zaabout, Abdelghafour; Müller, Christoph; Albertsen, Knuth; Cloete, Schalk Willem Petrus; van Diest, Geert; Amini, Shahriar (Peer reviewed; Journal article, 2020)
      This study demonstrates a novel“Gas Switching Water Splitting (GSWS)”technology for production of pure H2with integrated CO2capture. The reactor concept is based on the chemical looping technology where an oxygencarrier ...

    • Investigation of bubbling behavior in deep fluidized beds at different gas velocities using electrical capacitance tomography 

      Agu, Cornelius Emeka; Ugwu, Ambrose; Pfeifer, Christoph; Eikeland, Marianne Sørflaten; Tokheim, Lars-Andre; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2019)
      Deep bubbling fluidized beds have some advantages that make them attractive for industrial applications. Using different powders, this paper investigates the bubbling behavior in deep beds. The results show that bubbles ...