Browsing UiS Brage by Author "Chamssine, Fawzi"
Now showing items 1-6 of 6
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Catalytic hydrogenation of CO2 to methanol over In-promoted Cu/ZnO/Al2O3 derived from hydrotalcite-like precursors
Chamssine, Fawzi (Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06-15)Carbon dioxide emissions present a threat on a global level, driving governments and the scientific society to search for sustainable solutions to ease the effects of climate change. Carbon utilization offers a potentially ... -
CO2 hydrogenation to methanol over partially embedded Cu within Zn-Al oxide and the effect of indium
Stangeland, Kristian; Chamssine, Fawzi; Fu, Wenzhao; Huang, Zikun; Duan, Xuezhi (Peer reviewed; Journal article, 2021-08)Developing effective catalysts for CO2 hydrogenation to methanol is an important step to improve the efficiency of a promising process for green synthesis of fuels and chemicals. Optimizing the Cu dispersion is often the ... -
Effect of Zn2+ and K+ as Retarding Agents on Rock-Based Geopolymers for Downhole Cementing Operations
Chamssine, Fawzi; Khalifeh, Mahmoud; Saasen, Arild (Peer reviewed; Journal article, 2022)Geopolymer material has a potential to function alongside Portland Cement as an efficient cementitious material for well cementing and plug and abandonment applications. Geopolymer material requires retarding agents to be ... -
Instituting Retarders for Geopolymers Developed for Downhole Applications
Chamssine, Fawzi (PhD Theses;699, Doctoral thesis, 2023)Geopolymers are a cementitious material that has been under study for many years. The material is noticed as a potential full replacement for traditional cementitious material both in construction and petroleum industry. ... -
Retarding mechanism of Zn2+ species in geopolymer material using Raman spectroscopy and DFT calculations
Chamssine, Fawzi; H.S. Gasparotto, Luiz; Angelo Fonsecade Souza, Miguel; Khalifeh, Mahmoud; Cezar de Oliveira Freitas, Julio (Peer reviewed; Journal article, 2022)Geopolymers are the most promising alternative to Ordinary Portland Cement for oil-well cementing and well abandonment. To that end, the slurry needs a required pumping time ensured by the addition of retarders. Although ... -
Temperature-Dependent Classification of Geopolymers Derived from Granite Designed for Well Cementing Applications
Khalifeh, Mahmoud; Chamssine, Fawzi; Agista, Madhan Nur (Peer reviewed; Journal article, 2023)Alternative materials such as geopolymers appear to have potential advantages compared to Portland cement. However, the application of geopolymers for all sections of the well is still a major challenge due to the difference ...