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Showing 1 to 5 of 5 for “"catalyst pretreatment"”.
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Effects of catalyst pretreatment for carbon nanotube growth
The effects of pretreatment of iron catalyst for carbon nanotube (CNT) growth was studied. CNTs were grown on Fe/A1203 (1/10 nm) thin-film catalyst deposited on silicon substrates via exposure to C2H4 in a thermal chemical vapor deposition (CVD) furnace. During CVD, the sample was exposed to a …
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Carbidization and size effects of unsupported nanosized iron in the low temperature Fischer-Tropsch process
… been major advances in the development of the catalysts used. Previous work at the Centre for Catalysis Research, at the University of Cape Town, has shown great potential and provided a much deeper under- standing of the workings of the Fischer-Tropsch catalyst. The research has found that the …
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Hydrogen spillover in the Fischer-Tropsch synthesis: the role of platinum and gold as promoters in cobalt-based catalysts
… hydrocarbons. Commercial cobalt-based catalysts incorporate oxidic supports that are known to negatively affect the reducibility and hinder formation of the active phase. Consequently, reduction promoters such as Pt are introduced to facilitate the reduction of cobalt during catalyst …
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Efficacy of Catalytic Ozonation Advanced Oxidation Processes Compared to Traditional Ozone-Based Advanced Oxidation Processes for Degradation of Recalcitrant Compounds
… include ozonation of metal and carbon-based catalysts, known as catalytic ozonation. Traditional ozone-based AOPs currently in use include UV combined with ozone (UV/O<sub>3</sub>) and hydrogen peroxide combined with ozone (H<sub>2</sub>O<sub>2</sub>/O<sub>3</sub>).</p> <p>Seventeen studies …
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Study of Adsorbate Interactions of Alumina Surfaces Using Nuclear Magnetic Resonance Methods
… demand for environmentally benign solid acid catalysts to replace toxic and corrosive liquid solvents for a wide range of applications including renewable energy production, fine chemicals and petrochemicals. Given the complexity and amorphous nature of gamma-Al2O3, the role of water continues …