摘要:
A system and method that redistributes light from a light source. The controller can redistribute light to make an irradiance profile of the light source more uniform or make the irradiance profile match a fluid flow profile. The irradiance profile may be controlled by modifying light leakage from a plurality of waveguides or changing the light-directing properties of reflectors and/or lenses.
摘要:
A method that redistributes light from a light source. The controller can redistribute light to make an irradiance profile of the light source more uniform or make the irradiance profile match a fluid flow profile. The irradiance profile may be controlled by modifying light leakage from a plurality of waveguides or changing the light-directing properties of reflectors and/or lenses.
摘要:
A layered photocatalytic/thermocatalytic coating oxidizes contaminants that adsorb onto the coating into water, carbon dioxide, and other substances. The layered coating includes a photocatalytic outer layer of titanium dioxide that oxides volatile organic compounds. The coating further includes an intermediate layer of Group VIII noble metal doped titanium dioxide that oxidizes low polarity organic molecules. An inner layer of gold on titanium dioxide oxidizes carbon monoxide to carbon dioxide. When photons of the ultraviolet light are absorbed by the coating, reactive hydroxyl radicals are formed. When a contaminant is adsorbed onto the coating, the hydroxyl radical oxidizes the contaminant to produce water, carbon dioxide, and other substances.
摘要:
A photocatalytic/thermocatalytic coating includes an inner layer of metal/titanium dioxide or metal oxide/titanium dioxide that is applied on a honeycomb and an outer layer of titanium dioxide or metal oxide doped titanium dioxide applied on the inner layer. The inner layer of can be gold/titanium dioxide, platinum/titanium dioxide, or manganese oxide/titanium dioxide. The outer layer of titanium dioxide or metal oxide doped titanium dioxide oxides volatile organic compounds to carbon dioxide, water, and other substances. As the outer layer is thin and porous, the contaminants in the air can diffuse through the outer layer and adsorb onto the inner layer. When photons of the ultraviolet light are absorbed by the coating, reactive hydroxyl radicals are formed that oxidize the contaminant to produce water, carbon dioxide, and other substances.
摘要:
A fuel delivery system for a gas turbine engine includes a catalytic device for treating fuel to increase the usable cooling capability of an endothermic fuel. The catalytic device operates to treat and decompose components within in the fuel to render the fuel non-coking beyond 250° F. The catalytic device includes material that initiates reactions, and decomposition of coke forming components within the fuel to non-coke forming components within the fuel.
摘要:
A homogeneous ceria-based mixed-metal oxide, useful as a catalyst support, a co-catalyst and/or a getter has a relatively large surface area per weight, typically exceeding 150 m2/g, a structure of nanocrystallites having diameters of less than 4 nm, and including pores larger than the nanocrystallites and having diameters in the range of 4 to about 9 nm. The ratio of pore volumes, VP, to skeletal structure volumes, VS, is typically less than about 2.5, and the surface area per unit volume of the oxide material is greater than 320 m2/cm3, for low internal mass transfer resistance and large effective surface area for reaction activity. The mixed metal oxide is ceria-based, includes Zr and or Hf, and is made by a novel co-precipitation process. A highly dispersed catalyst metal, typically a noble metal such as Pt, may be loaded on to the mixed metal oxide support from a catalyst metal-containing solution following a selected acid surface treatment of the oxide support. Appropriate ratioing of the Ce and other metal constituents of the oxide support contribute to it retaining in a cubic phase and enhancing catalytic performance. Rhenium is preferably further loaded on to the mixed-metal oxide support and passivated, to increase the activity of the catalyst. The metal-loaded mixed-metal oxide catalyst is applied particularly in water gas shift reactions as associated with fuel processing systems, as for fuel cells.
摘要:
A durable Pd-based alloy is used for a H2-selective membrane in a hydrogen generator, as in the fuel processor of a fuel cell plant. The Pd-based alloy includes Cu as a binary element, and further includes “X”, where “X” comprises at least one metal from group “M” that is BCC and acts to stabilize the β BCC phase for stability during operating temperatures. The metal from group “M” is selected from the group consisting of Fe, Cr, Nb, Ta, V, Mo, and W, with Nb and Ta being most preferred. “X” may further comprise at least one metal from a group “N” that is non-BCC, preferably FCC, that enhances other properties of the membrane, such as ductility. The metal from group “N” is selected from the group consisting of Ag, Au, Re, Ru, Rh, Y, Ce, Ni, Ir, Pt, Co, La and In. The at. % of Pd in the binary Pd—Cu alloy ranges from about 35 at. % to about 55 at. %, and the at. % of “X” in the higher order alloy, based on said binary alloy, is in the range of about 1 at. % to about 15 at. %. The metals are selected according to a novel process.
摘要:
The athermal sorbent bed regeneration system of the present invention includes a main fuel supply, at least one sorbent bed, a source of microwave energy, and a secondary fuel supply. The main fuel supply has a first concentration of an impurity and the secondary fuel supply has a second concentration of the impurity that is less than the first concentration of the impurity. The sorbent bed adsorbs the impurity. The microwave energy source regenerates the sorbent bed for reuse.
摘要:
A fuel delivery system for an energy conversion device includes a fuel deoxygenator and an oxygen scavenger module for removing dissolved oxygen and increasing the usable cooling capability of a fuel. Fuel emerging from the fuel-deoxygenating device flows into the oxygen-scavenging module where a second portion, smaller than the first portion of oxygen is removed from the fuel. The combination of the oxygen scavenger and the fuel deoxygenator provides an increase in removal of dissolved oxygen relative to the use of either device alone. The combination provides the desired increase in deoxygenation of fuel without the corresponding increase in device size.
摘要:
A durable catalyst support/catalyst is capable of extended water gas shift operation under-conditions of high temperature, pressure, and sulfur levels. The support is a homogeneous, nanocrystalline, mixed metal oxide of at least three metals, the first being cerium, the second being Zr, and/or Hf, and the third importantly being Ti, the three metals comprising at least 80% of the metal constituents of the mixed metal oxide and the Ti being present in a range of 5% to 45% by metals-only atomic percent of the mixed metal oxide. The mixed metal oxide has an average crystallite size less than 6 nm and forms a skeletal structure with pores whose diameters are in the range of 4-9 nm and normally greater than the average crystallite size. The surface area of the skeletal structure per volume of the material of the structure is greater than about 240 m2/cm3. The method of making and use are also described.
摘要翻译:耐用的催化剂载体/催化剂能够在高温,高压和硫含量的条件下进行扩展的水煤气变换操作。 载体是至少三种金属的均匀的,纳米晶体的混合金属氧化物,第一种是铈,第二种是Zr,和/或Hf,第三种是重要的Ti,三种金属包含至少80%的金属 混合金属氧化物的成分和Ti的含量以混合金属氧化物的原子百分比计为5%〜45%的范围。 混合金属氧化物的平均微晶尺寸小于6nm,并且形成具有直径在4-9nm范围内且通常大于平均微晶尺寸的孔的骨架结构。 骨架结构的每体积结构的材料的表面积大于约240μm2 / cm 3。 还描述了制造和使用的方法。