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Showing 1 to 20 of 35 for “"Catalytic conversion"”.
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Catalytic conversion of Ethylbenzene over acid zeolites
In this study, the performance of this test reaction was employed to compare the acidity of various zeolites, viz. lanthanum/sodium-exchanged zeolite Y (LaNaY-72), hygrogen/sodium-exchanged zeolote Y (LZY-52, LZY-62, LZY-82), hydrogen-exchanged zeolite Beta (H-BEA-15, H-BEA-25) and …
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Catalytic Conversion of Lignocellulosic Biomass to Carboxylic Acids and Derivatives
… structured hemicellulose and cellulose are catalytically converted to lactic acid or its esters which can be further upgraded to liquid hydrocarbon fuels or value added chemicals.Although a variety of lignocellulosic biomass can be used as feedstocks in designed conversion processes, the …
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Catalytic Conversion of Carbon-Containing Compounds into Valuable Chemicals and Fuels
<p>Conversion of carbon-containing compounds, especially C1 compounds such as carbon dioxide and methane, to valuable chemicals and fuels will hopefully address concerns over decreasing supplies of fossil fuels and mitigate the eects of greenhouse gas emissions on global climate change. Many …
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Heterogeneous catalytic conversion of biomass to added-value biofuels and chemicals
… of small aromatic feedstock molecules. The catalytic conversion of lignin from renewable biomass sources to added-value biofuels and chemicals is important in meeting the biorefinery concept. One of the main aims of this research was to investigate halide salts to enhance the stability and …
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Catalytic Conversion of Cellulose to Carboxylic Acids through Aqueous Phase Partial Oxidation
… and green chemicals. However, cellulosic biomass conversion is not without inherent challenges: a refractory crystalline structure, coupled with high water content and oxygen content, make the catalytic conversion extremely difficult. A novel, environmental friendly process, is proposed to utilize …
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Catalytic Conversion of Glycerol to Glycerol Carbonate Utilizing CO₂ and Dimethyl Carbonate
… by-product. This research focuses on the catalytic conversion of glycerol to value-added glycerol carbonate using CO2, an abundant, non-toxic greenhouse gas, and dimethyl carbonate (DMC), which yields more glycerol carbonate. The catalysts were prepared by co-precipitation method, and …
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Catalytic conversion of methane to partially oxidized products over copper-exchanged zeolites
The selective conversion of methane to liquid oxygenated compounds is a grand challenge in catalysis. Although natural gas can be processed industrially in large-scale facilities, new catalytic processes are required that economically directly convert methane to liquid products in small-scale units …
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Catalytic conversion of biomass-derived molecules into mono- and dicarboxylic acids and esters
… This thesis has addressed the challenges in chemocatalytic synthesis of mono- and dicarboxylic acids and esters, including gluconic acid, succinic acid, itaconic acid and their esters, from biomass-derived molecules. Gold (Au) catalysts have been rarely investigated for the oxidation of glucose in …
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The catalytic conversion of low chain length hydrocarbons to liquid fuels using ion exchange resin
… conditions, which result in the complete conversion of monomers. Recycling liquid product reduces the liquid production and increases the production of trimer at the expense of dimer. At moderate reaction temperatures ion exchange resins are regenerable but the activity of the catalyst is …
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Factors influencing the catalytic activity of Fe-ZSM-5 during the catalytic conversion of N₂O
… its oxidation state (Fe²⁺, Fe³⁺, or Fe⁴⁺). Catalytic function of isolated redox sites within zeolite cavities (or channels) may result in a material with specific redox properties (Kiwi-Minsker et al., 2003). The properties of transition metal exchanged zeolites have been studied from the …
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The thermodynamics, mechanism and kinetics of the catalytic conversion of propylene and water to diisopropyl ether over amberlyst 15
Diisopropyl ether (DIPE) was synthesised in a single step from a feed of propylene and water over Amberlyst 15 ion exchange resin catalyst. It was produced in a trickle bed reactor at pressures between 1 bar and 60 bar, at temperatures between 70°C and 160°C and at overall propylene to water ratios …
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Zeolite deactivation during hydrocarbon reactions: characterisation of coke precursors and acidity, product distribution
The catalytic conversion of hydrocarbons over zeolites has been applied in large scale petroleum-refining processes. However, there is always formation and retention of heavy by-products, called coke, which causes catalyst deactivation. This deactivation is due to the poisoning of the acid sites …
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Synthesis and Catalytic Applications of Ni-Based Single-Atom and Nanoparticle Catalysts Supported on UiO-66-NH2
… capacity. Using it as a catalyst support for CO₂ conversion represents a promising approach. Nickel was employed as the catalytic metal in this study, and two distinct strategies were attempted to introduce it into UiO-66-NH2: ionic and cluster forms. The resulting catalysts, including BET …
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Experimental and DFT study on selective oxidation of 5-Hydroxymethyl furfural over cadmium sulfide catalyst
Catalytic conversion of biomass or biomass derived intermediate to value added chemicals is a way to reduce dependency on conventional fossil fuels. Oxidation of 5-hydroximethyl furfural (HMF) is considered one of the most important biomass conversions, which resulted into value added …
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Exploration of mild and selective hydrozirconation reactions facilitated by zirconocene hydride catalysts generated in Situ.
… develop reaction conditions that facilitate the conversion of oxozirconocenes to ZrH catalysts using hydrosilanes and (ii) identitfy a mild strategy for the preparation of a ZrH catalyst using Cp2ZrCl2 as a precatalyst. After establishing a general platform for ZrH catalyst generation and its …
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Design of heterogeneous bifunctional catalyst for upgrading bioethanol through the Guerbet reaction
Catalytic conversion of ethanol through the Guerbet reaction to higher carbon number molecules allows efficient transformation of biomass to liquid fuels and commodity chemicals. A selective and stable heterogeneous catalyst is required to render this conversion possible in an economic way. The …
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An Integrated Process for Catalytical Conversion of Simple Sugars into Platform Chemicals, HMF and FDCA: Catalysis, Continuous Flow Reactor Design, Valorization of Waste By-Product
The catalytic conversion of monosaccharides, such as glucose and fructose, into bio-based platform chemicals plays a crucial role in advancing sustainable chemical production. 5-Hydroxymethylfurfural (HMF) and 2,5-furandicarboxylic acid (FDCA) are particularly valuable due to their potential as …
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Development of Catalytic Processes for the Transformation of Low Value Chemical Feedstocks to Value Added Chemicals
… describes fundamental studies and development of catalytic processes for the transformation of abundant, low value chemical resources into value added chemicals. Chapter 1 of this work gives a brief overview of the motivation, challenges, prior work for the catalytic conversion of methane to …
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Solar-driven catalytic processes for sustainable fuels and chemicals production
Solar-driven catalytic conversion of CO2 emissions and chemical wastes into value-added fuels and chemicals offers a promising solution to address the escalating energy demand and promote sustainable development. However, the advancement of solar fuels technology is severely impeded by the …
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