Global ETD Search
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Showing 1 to 20 of 86 for “"product distribution"”.
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Zeolite deactivation during hydrocarbon reactions: characterisation of coke precursors and acidity, product distribution
… 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 and/or pore blockage. The formation of coke on hydrocarbon processing catalysts is of considerable technological and economic …
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Modeling Fischer Tropsch synthesis in two-phase, continuous, well-mixed slurry reactors
… Fischer Tropsch model, predict the hydrocarbon product distribution, determine what effect Vapour-Liquid Equilibrium (VLE) has on the product distribution, selectivity and kinetics, and determine whether the deviations from the 'ideal' Anderson-Schulz Flory (ASF) distribution can be attributed …
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UNCOVERING THE MOLECULAR BASIS FOR FATTY ACID SYNTHASE PRODUCT SPECIFICITY: STRUCTURAL AND KINETIC EVALUATION OF THIOESTERASE I AND THIOESTERASE II
… a lesser extent stearate (C18), and this strict product distribution is dictated by the acyl chain-length selectivity of the endogenous thioesterase (TE1) domain. With the exception of lactating breast, liver and adipose tissues, FASN expression is essentially absent in normal cells since these …
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Density Functional Theory Calculations Complement Mass Spectrometry Experiments in the Investigation of Biomass Fast Pyrolysis and Ion-Molecule Reaction Mechanisms
… reaction networks fail to explain the product distribution even for a simple model compound, the cellulose dimer, cellobiose. A novel approach of using mass spectrometry to instantly characterize fast pyrolysis vapors allows for identification of initial products to help delineate the …
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Cyanoethylation of 2-Naphthol. Influence of Solvent and Catalyst on the Course of Reaction
… a relationship between reaction conditions and product distribution could be established.
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Development of a Kinetic Model for Low Temperature Fischer-Tropsch Synthesis
… of CO and H2, is converted to hydrocarbon products ranging from methane to wax when low temperature conditions are used. Subsequent product upgrading steps allow high quality liquid fuels to be obtained which are clean burning. This will help to mitigate the impact of human activity on the …
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Reaction of an Ambident Anion. Effect of Solvent and Catalyst on the Cyanoethylation of 2-Naphthol
… between solvent and catalyst character and product distribution.
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Cobalamin-Enhanced Anaerobic Biotransformation of Carbon Tetrachloride
… was to evaluate the potential of improving the product distribution and rate of biotransformation at high CT concentrations by supplementing cultures with cobalamins. Three different cultures; an acetogenic pure culture-Acetobacterium woodii (ATCC-29683), a dichloromethane degrading enrichment …
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Theoretical models for the electrochemical reduction of CO2 on copper catalysts under working conditions
… scale up of this technology, involving the production of heavily used chemicals such as ethylene. Copper is a unique material for catalyzing these C2+ products, however significant advances need a deep theoretical understanding of the complexity of this material under CO2 reduction …
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I. Depolymerization-macrocyclization of (o-phenylene-ethynylene)-alt-(arylene-ethynylene) copolymers II. Improving existing water filtration membranes via covalent modification
… about how monomer structure affects product distribution. In our efforts to close this gap, we studied how monomers with two different geometries would mix under metathesis conditions to form distributions of macrocycles using a depolymerization-macrocyclization method. Instead, we …
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Stereochemistry, isotope effects, and inhibition of terpene biosynthesis: I. Stereospecificity and mechanism of monoterpene cyclases. II. Inhibition by heteroatom analogs of carbocation intermediates
… Deuterium isotope effects on the monoterpene product distribution from incubations of (1-$\sp3$H;8,9-$\sp2$H$\sb6$) GPP with the pinene cyclases are too small to explain by isotopically sensitive branching between limonene and the bicyclic monoterpenes.
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Healthcare Access and Equity
… of a large-scale subsidized menstrual hygiene product distribution scheme on women's health outcomes and educational attainment. The final essay assesses the effects of a nutrition intervention program targeting adolescent girls on both educational performance and health indicators. Together, …
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CONVERSION OF METHANOL AND LIGHT OLEFINS TO GASOLINE OVER A SHAPE SELECTIVE CATALYST ZSM-5
… were studied over Ni-ZSM-5 zoelite catalyst. The product distribution over a broad range of space velocities indicates the reaction sequence: dimethyl paraffins methanol (,ether) C(,2)-C(,5) olefins (,aromatics) Monomethyl aliphatics predominate over both straight-chain and dimethyl hydrocarbons. …
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Synthesis and catalytic structure activity relations of hydrophobic zeolites with isolated framework metals that act as water tolerant Lewis acids
… to efficiently convert raw materials to useful products. Zeolite catalysis enables high product selectivity and is widely used due to the high activity, thermal stability, and well-defined crystalline pore structure of zeolites. Moreover, incorporation of metals into the framework of hydrophobic …
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ΠΑΡΑΓΩΓΗ ΑΙΘΥΛΕΝΙΟΥ ΜΕ ΚΑΤΑΛΥΤΙΚΗ ΑΤΜΟΠΥΡΟΛΥΣΗ Κ-ΕΞΑΝΙΟΥ
IN THIS THESIS IT WAS STUDIED THE PRODUCTION OF ETHYLENE IN THE PRESENCE OF CATALYSTS VIA STEAM CRACKING OF N-HEXANE. VARIOUS TYPES OF CATALYSTS WERE PREPAREDAND TESTED IN AN EXPERIMENTAL PYROLYSIS UNIT. THE CATALYST SAMPLE WITH THE COMPOSITION 12CAO7AL2O3 SHOWED THE HIGHEST SELECTIVITY IN RELATION …
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Open source building alliance ecology : the Internet framework for consumer driven participative design
… powerful tools for the development of innovative products in various industries (Von Hippel, 2006). Success stories in computer and clothing manufacturing signify that the adoption of Open Source practices may improve service standards and productivity (Clayton, 2001; Thomle & Von Hippel, 2002). …
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Studies of sodium azide with tetraphenylcyclopentadienones and various analogs
… would have any appreciable effect on the product distribution of the corresponding l,5,7,8–tetraphenyl-2,3,4–triazabicyclo[3.3.0]octa-2,7-dien-6-ones and the 3,4,5,6–tetraphenyl–2(lH)â pyridinones that were formed by an acid catalyzed rearrangement. It was found that the chloro substituent …
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Alkilintų 5-cian-2-metilsulfanil-4(3H)-pirimidinonų sintezės ir ciklizacijos reakcijų tyrimas /
… -cyano-2-methylsulfanyl-4(3H)-pyrimidinone (major product), small amounts of ethyl 4-amino-2-methylsulfanylpyrimidine-5-carboxylate and uncyclisized products – ethyl 2-cyano-3-ureido-2-propenoates. Alkylation of 5-cyano-2-methylsulfanyl-4(3H)-pyrimidinone with 4-substituted ω- bromoacetophenones in …
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Mechanistic Studies of Vitamin B(12)-Catalyzed Dechlorination and Carbon-Carbon Bond-Forming Reactions
… carbons of each coupling partner. Dimerization products were obtained in good to excellent yields for mono- and 1,1-disubstituted alkenes, and dienes containing one aryl alkene underwent intramolecular cyclization in good yields. 1,2-Disubstituted and trisubstituted alkenes were unreactive. …
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From Dye Sensitized Solar Cells to Organic Field Effect Transistors: A Computational Investigation into the Structural and Electronic Properties of Novel Phthalocyanines
… gain insight into the experimentally observed Pc product distribution. By examining the electronic structure and formation energies of the various Pc precursors, we explain the product distribution as well as propose the formation of additional Pcs, which were not currently believed to form.</p> …
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