Abstract:
Disclosed herein, are activated carbon honeycomb catalyst beds used in a system for removing mercury from flue gas of a coal combustion system. The a ctivated carbon honeycomb can for example remove greater that 90% mercury fr om flue gas with a simple design and without adding material to the flue gas . Also disclosed herein are methods for using the disclosed honeycomb cataly st beds and systems..
Abstract:
A method for fabricating thermoelectric device is provided according to the present invention. The method comprises following steps: (a-1) placing a first electrode that has an upper surface in a die; (b-1) placing a first interlayer on the first electrode; (c-1) inserting a separating plate onto the surface vertically to divide inner space of the die into at least two parts, and filling first thermoelectric materials on the first interlayer of some parts of the at least two parts and filling second thermoelectric materials on the first interlayer of other parts; (d-1) sintering the die; and (e-1) removing the separating plate after sintering to obtain a p shape thermoelectric device. By use of the method for fabricating thermoelectric device according to the present invention, process of forming bulked thermoelectric materials and process of combining with hot end electrodes on the devices are completed simultaneously to avoid adverse impact due to heat and pressure that effect on related elements for a second time.
Abstract:
The present invention provides honeycomb ceramic articles and methods of manufacturing such articles having few or no defects in the outer skin. Methods for minimizing and/or eliminating cracks in thin-wall and ultra-thin-wall cordierite honeycomb articles are disclosed. Advantageously, the present invention prevents skin cracks from forming during the production of thin-wall and ultra-thin- wall cordierite honeycomb articles by optimizing skin properties such as porosity, thickness and pore size distribution.
Abstract:
Disclosed is a honeycomb ceramic article that exhibits a primary crystalline phase of cordierite having a coefficient of thermal expansion (CTE), wherein CTE -7 /°C over the temperature range of about 25°C to about 800°C; a total porosity, P, of at least 28%, a transverse I-ratio, I T , of less than 0.92; and a pore size distribution wherein at least 60% of the total pore volume is comprised of pores having diameters between 0.5 µm and 5.0 µm. Also provided is a ceramic honeycomb article comprising a phase of cordierite and exhibiting a mean CTE -7 /°C (from 25 to 800°C) in at least one direction, and 28% = P = 33%. Methods of manufacturing ceramic articles comprising the aforementioned cordierite compositions are also disclosed.
Abstract translation:公开了一种蜂窝陶瓷制品,其呈现具有热膨胀系数(CTE)的堇青石主结晶相,其中在约25°的温度范围内CTE <1.5×10 -7 /℃/℃ C至约800℃; 总孔隙率P为至少28%,横向I比率I T SUB小于0.92; 和孔径分布,其中总孔体积的至少60%由直径在0.5μm和5.0μm之间的孔组成。 还提供了一种陶瓷蜂窝体制品,其包含堇青石相并且在至少一个方向上具有平均CTE <1.0×10 -7 /℃(25℃至800℃),并且28% = P = 33%。 还公开了制造包含上述堇青石组合物的陶瓷制品的方法。
Abstract:
Extruded metal honeycombs are produced by the direct extrusion of a softened bulk metal feedstock through a honeycomb extrusion die comprising a feedhole array for delivering softened metal through a supporting die baseplate to a honeycomb die discharge section, the discharge section comprising an array of intersecting discharge slots that form the walls of an extruded metal honeycomb structure. This process can be optimized by employing a proper pressure gradient for a particular extrudate flow rate, extrudate composition, and wall-drag condition arising from the particular composition of fhe feedhole wall, as illustrated graphically in Figure 4.
Abstract:
A method for reducing NOx in lean exhaust gases (8) to N2 includes injecting a fuel (20) into the exhaust gases (8) and passing the exhaust gases and fuel mixture through a catalyst (14) to reduce the NOx to N2. The catalyst (14) may be (a) a perovskite compound, (b) at least one metal oxide impregnated with at least one precious metal, (c) a zeolite impregnated with at least one precious metal, or (d) a combination of a zeolite and at least one metal oxide impregnated with at least one precious metal.