Transition Metal-Modified Zirconium Phosphate Electrocatalysts for
... and potentially serving as an alternative energy vector given its high gravimetric energy density and modularity of use [1]. Conventional hydrogen is produced through steam methane reforming, but hydrogen produced by water electrolysis has the potential to be CO2 -emission free if the energy require ...
... and potentially serving as an alternative energy vector given its high gravimetric energy density and modularity of use [1]. Conventional hydrogen is produced through steam methane reforming, but hydrogen produced by water electrolysis has the potential to be CO2 -emission free if the energy require ...
Catalytic oxidation of ammonia to nitrogen
... acidification of the environment in The Netherlands. About 94% of the ammonia emitted originates from agricultural sources in The Netherlands [3]. The damage caused by acidification in The Netherlands is serious: about half of the forests and much of the heather are affected; most of the fens have t ...
... acidification of the environment in The Netherlands. About 94% of the ammonia emitted originates from agricultural sources in The Netherlands [3]. The damage caused by acidification in The Netherlands is serious: about half of the forests and much of the heather are affected; most of the fens have t ...
Low Temperature Precursors for SnOx Thin Films
... I would firstly like to thank my supervisor Professor Michael Hill for all the help, encouragement and useful discussions about the work presented within this thesis. I was fortunate to also have the wisdom and guidance of two other academic supervisors with Professor Kieran Molloy providing his wea ...
... I would firstly like to thank my supervisor Professor Michael Hill for all the help, encouragement and useful discussions about the work presented within this thesis. I was fortunate to also have the wisdom and guidance of two other academic supervisors with Professor Kieran Molloy providing his wea ...
engineering chemistry
... An atom is the smallest form of a chemical particle that retains the properties of the particle. The word 'atom' comes from the Greek word 'atomos', meaning 'unable to be cut'. The original meaning of atom was the smallest, indivisible form of a chemical particle. Now we know how to divide atoms int ...
... An atom is the smallest form of a chemical particle that retains the properties of the particle. The word 'atom' comes from the Greek word 'atomos', meaning 'unable to be cut'. The original meaning of atom was the smallest, indivisible form of a chemical particle. Now we know how to divide atoms int ...
Chem Soc Rev
... processes that satisfy the principles of green chemistry.8,9 In particular, it is highly desirable to develop new catalytic oxidation processes to replace the current energetically inefficient and/or environmentally unfriendly multi-step reactions. The catalytic oxidation of alcohols to aldehydes or k ...
... processes that satisfy the principles of green chemistry.8,9 In particular, it is highly desirable to develop new catalytic oxidation processes to replace the current energetically inefficient and/or environmentally unfriendly multi-step reactions. The catalytic oxidation of alcohols to aldehydes or k ...
Improved Synthesis of Seven-Coordinate Molybdenum( I I) and
... [W(CN-t-C4H&I]I. A solution of 0.234 g (0.92 "01) of iodine dissolved in 10 mL of methanol was added dropwise with stirring to a solution containing 0.484 g (0.94 mmol) of W(CN-tc4&)&0)3 dissolved in 25 mL of methanol. After the addition was complete, 0.26 g (3.1 "01) of tert-butyl isocyanidewas add ...
... [W(CN-t-C4H&I]I. A solution of 0.234 g (0.92 "01) of iodine dissolved in 10 mL of methanol was added dropwise with stirring to a solution containing 0.484 g (0.94 mmol) of W(CN-tc4&)&0)3 dissolved in 25 mL of methanol. After the addition was complete, 0.26 g (3.1 "01) of tert-butyl isocyanidewas add ...
The role of aqueous-phase oxidation in the A
... the laboratory. Laboratory chamber experiments of SOA formed from various classes of precursors tend to produce aerosol that is relatively unoxidized (average carbon oxidation state (OSc)~ -1.1 to 0.1, Heald et al., 2010; Kroll et al., 2011). Several efforts to age OA in laboratory chambers have als ...
... the laboratory. Laboratory chamber experiments of SOA formed from various classes of precursors tend to produce aerosol that is relatively unoxidized (average carbon oxidation state (OSc)~ -1.1 to 0.1, Heald et al., 2010; Kroll et al., 2011). Several efforts to age OA in laboratory chambers have als ...
Oxygen Carriers Materials for Chemical
... It has been known for more than a hundred years that CO2 is a greenhouse gas and release of CO2 from human activities may affect the climate on earth [1]. Power generation from fossil fuels is the largest source of global CO2 emission. Several other sources such as oil refineries, petrochemical, ste ...
... It has been known for more than a hundred years that CO2 is a greenhouse gas and release of CO2 from human activities may affect the climate on earth [1]. Power generation from fossil fuels is the largest source of global CO2 emission. Several other sources such as oil refineries, petrochemical, ste ...
Photo-oxidation of pinonaldehyde at low NOx
... obtain the total COA (t) from the suspended mass concentration, we correct for wall losses, assuming that organic particles lost to the wall are in equilibrium with the suspended particles and vapor-phase species, and also that the organicto-seed mass ratio remains the same for suspended and deposit ...
... obtain the total COA (t) from the suspended mass concentration, we correct for wall losses, assuming that organic particles lost to the wall are in equilibrium with the suspended particles and vapor-phase species, and also that the organicto-seed mass ratio remains the same for suspended and deposit ...
Chemistry Club Demos - 10-8-15
... Add 30 g of B(OH)3 to the mixture and stir until all solids have dissolved. 3.) Add a few boiling chips to the flask and place it in the clamp on the hotplate. Put the rubber stopper with the ‘S’- shaped tube in the neck of the flask, and heat the mixture to a vigorous boil. This may take 5-10 ...
... Add 30 g of B(OH)3 to the mixture and stir until all solids have dissolved. 3.) Add a few boiling chips to the flask and place it in the clamp on the hotplate. Put the rubber stopper with the ‘S’- shaped tube in the neck of the flask, and heat the mixture to a vigorous boil. This may take 5-10 ...
PDF File
... whether one or several distinct metal ions mediate these interactions, Shan et al. developed “thermodynamic fingerprint analysis” (TFA),1 a quantitative approach that determines whether the same or different metal ions give rescue at different positions (11). TFA and related analyses (11, 12) provid ...
... whether one or several distinct metal ions mediate these interactions, Shan et al. developed “thermodynamic fingerprint analysis” (TFA),1 a quantitative approach that determines whether the same or different metal ions give rescue at different positions (11). TFA and related analyses (11, 12) provid ...
The shock tube as wave reactor for kinetic studies and material
... providing nearly instantaneous and uniform heating of reactants, it allows rapid quenching of products leading to particle condensation and growth. The effect of varying initial temperature, pressure, and mixture composition on the size and yield of the particles produced, can be conveniently studie ...
... providing nearly instantaneous and uniform heating of reactants, it allows rapid quenching of products leading to particle condensation and growth. The effect of varying initial temperature, pressure, and mixture composition on the size and yield of the particles produced, can be conveniently studie ...
Solubility of platinum in aqueous solutions at 25°C and pHs 4 to 10
... placers, weathering profiles, etc.). Because the charged species PtOH+ is largely predominant, the mobility and transfer of platinum can also be affected by adsorption-desorption mechanisms onto oxides and hydroxides. ...
... placers, weathering profiles, etc.). Because the charged species PtOH+ is largely predominant, the mobility and transfer of platinum can also be affected by adsorption-desorption mechanisms onto oxides and hydroxides. ...
Date: 16 / 01 / 2014 - Qatar University QSpace
... series of experiments were carried out to study the variation of preparation parameters such as support type, temperature, ‘ion-exchange’ time and the concentration of the (precursor) salt. ...
... series of experiments were carried out to study the variation of preparation parameters such as support type, temperature, ‘ion-exchange’ time and the concentration of the (precursor) salt. ...
Li−Fe−P−O2 Phase Diagram from First Principles Calculations
... effective oxygen partial pressure may be affected by the presence of reducing or oxidizing agents. For example, to improve electrical conductivity, carbon-containing precursors are often used in the synthesis of LiFePO4. Carbon is a reducing agent, and carbothermal reduction (CTR) is used extensivel ...
... effective oxygen partial pressure may be affected by the presence of reducing or oxidizing agents. For example, to improve electrical conductivity, carbon-containing precursors are often used in the synthesis of LiFePO4. Carbon is a reducing agent, and carbothermal reduction (CTR) is used extensivel ...
Synthesis of Inorganic Nanostructures in Reverse Micelles
... Reverse Micelles For a feasible nanoparticle synthesis in reverse micelles, water–surfactant–oil formulations that give stable microemulsions must be identified. Phase diagrams already available in the literature for the ternary mixtures of surfactant–oil–water or the quaternary mixtures of water–sur ...
... Reverse Micelles For a feasible nanoparticle synthesis in reverse micelles, water–surfactant–oil formulations that give stable microemulsions must be identified. Phase diagrams already available in the literature for the ternary mixtures of surfactant–oil–water or the quaternary mixtures of water–sur ...
Chapter 4 Metal nanoparticles stabilized by chiral ligands with carbohydrate backbone
... The metal particles are unstable with respect to the agglomeration to the bulk. The agglomeration is an undesired process because it leads to the loss of the properties associated with the colloidal state of the metal particles. The stability of these particles results from the equilibrium of the va ...
... The metal particles are unstable with respect to the agglomeration to the bulk. The agglomeration is an undesired process because it leads to the loss of the properties associated with the colloidal state of the metal particles. The stability of these particles results from the equilibrium of the va ...
Ni recovery using KOH, NaOH, and NH4OH in the presence of
... Figures 5, 6, 8, and 10 show Eh-pH diagrams obtained using Medusa software. As shown in Figures 5 and 6, there is a high possibility of forming insoluble species of nickel and iron in NaOH and KOH media (Table II, reactions (1) to (4) and (9) to (15)). The probable soluble species of nickel formed i ...
... Figures 5, 6, 8, and 10 show Eh-pH diagrams obtained using Medusa software. As shown in Figures 5 and 6, there is a high possibility of forming insoluble species of nickel and iron in NaOH and KOH media (Table II, reactions (1) to (4) and (9) to (15)). The probable soluble species of nickel formed i ...
Curriculum Vitae - Université Paris-Sud
... Nucleation by reactions (19, 20) is in competition with growth by (23, 24) and is favored by fast A- generation, thus at high dose rate. Multivalent anionic A y- and cationic Mx+ precursors react also by successive ion fixation on the growing cluster according to the stoichiometry and yield eventual ...
... Nucleation by reactions (19, 20) is in competition with growth by (23, 24) and is favored by fast A- generation, thus at high dose rate. Multivalent anionic A y- and cationic Mx+ precursors react also by successive ion fixation on the growing cluster according to the stoichiometry and yield eventual ...
Catalytic decomposition of N2O over Rh/Zn–Al2O3 catalysts
... ozone layer depletion has raised much concern. The concentration of N2O in the atmosphere has been increasing at an annual rate of 0.2–0.3% since the industrial revolution.1 Anthropogenic N2O emission comes from several chemical processes (e.g., nitric acid and adipic acid production) and fossil fue ...
... ozone layer depletion has raised much concern. The concentration of N2O in the atmosphere has been increasing at an annual rate of 0.2–0.3% since the industrial revolution.1 Anthropogenic N2O emission comes from several chemical processes (e.g., nitric acid and adipic acid production) and fossil fue ...
Magnesium based ternary metal hydrides containing alkali and
... Cs) and the 9-fold configuration in binary PbCl2 -type hydrides AeH2 (Ae = Ca, Sr, Ba, Eu, Yb). The influence of cation size on CNs and H atom configurations is particularly apparent in barium and strontium based analogues. As shown in Fig. 2 the bigger Ba atoms in orthorhombic Ba6 Mg7 H26 occupy tw ...
... Cs) and the 9-fold configuration in binary PbCl2 -type hydrides AeH2 (Ae = Ca, Sr, Ba, Eu, Yb). The influence of cation size on CNs and H atom configurations is particularly apparent in barium and strontium based analogues. As shown in Fig. 2 the bigger Ba atoms in orthorhombic Ba6 Mg7 H26 occupy tw ...
الشريحة 1
... The process is therefore endothermic (H1 > 0). Separation of solvent molecules to accommodate the solute also always requires energy (H2 > 0). The third component, which arises from the attractive interactions between solute and solvent, is always exothermic (H3 < 0). Depending on the relative ma ...
... The process is therefore endothermic (H1 > 0). Separation of solvent molecules to accommodate the solute also always requires energy (H2 > 0). The third component, which arises from the attractive interactions between solute and solvent, is always exothermic (H3 < 0). Depending on the relative ma ...
Combustion characteristics
... flame sits at a precise distance up the wick). If adiabaticity of the initial ignition region is prevented by nearby heat sinks, as a cold solid wall, this kind of 'thermal' combustion cannot propagate (safety lamps and quenching grids are based on this fact); e.g. for premixed methane/air stoichiom ...
... flame sits at a precise distance up the wick). If adiabaticity of the initial ignition region is prevented by nearby heat sinks, as a cold solid wall, this kind of 'thermal' combustion cannot propagate (safety lamps and quenching grids are based on this fact); e.g. for premixed methane/air stoichiom ...
الشريحة 1
... - Warm lakes and streams have less O2 dissolved in them than cool lakes (thermal pollution), fish may suffocate and die under these conditions. ...
... - Warm lakes and streams have less O2 dissolved in them than cool lakes (thermal pollution), fish may suffocate and die under these conditions. ...
Mock Examination (2016/2017) CHEMISTRY PAPER 1 SECTION B
... Use one experiment to account for the following statements with reference to the TWO characteristics of transition metals. “Zinc and copper are both located in area for transition metals in the Periodic Table. However, zinc is usually not regarded as a transition metals but copper is regarded as a t ...
... Use one experiment to account for the following statements with reference to the TWO characteristics of transition metals. “Zinc and copper are both located in area for transition metals in the Periodic Table. However, zinc is usually not regarded as a transition metals but copper is regarded as a t ...
Liquid-feed flame spray pyrolysis
Liquid–feed flame spray pyrolysis (LF-FSP) is one of the most recent iterations in flame spray pyrolysis (FSP) powder production technology. FSP produces metal oxide powders from highly volatile gaseous metal chlorides that are decomposed/oxidized in hydrogen-oxygen flames to form nano-oxide powders. However, products made from FSP's vapor-phase process are limited to Al-, Ti-, Zr-, and Si-based oxides from their metal chlorides. Thus, interest in producing more complex materials required a new methodology, LF-FSP.LF-FSP, as invented at the University of Michigan, uses metalloorganic precursors such as metal carboxylates or alkoxides, not metal chlorides. Briefly, alcohol (typically ethanol) solutions containing 1–10 wt % loading of the target ceramic components as precursors are aerosolized with O2 into a quartz chamber and ignited with methane pilot torches. Initial combustion temperatures run 1500–2000 °C, depending on the processing conditions, generating nanopowder ""soot"". Temperatures drop to 300–500 °C over 1.5 m, equivalent to a 1000 °C quench in 100 ms leading to kinetic products and nanopowders that are unaggregated. Production rates can be 200 g/h when using wire-in-tube electrostatic precipitators operating at 10 kV. Typical powders have 15–100 nm average particle sizes (APS) with specific surface areas of 30–100 m2/g. LF-FSP technology can be used to produce mixed and single metal oxides easily from low cost starting materials in a single step without forming harmful byproducts like HCl, which forms when metal chlorides are used as precursors.