Abstract:
hidrotalcita que confere resistência térmica aperfeiçoada a resinas e método de preparação das mesmas esta invenção se refere a uma hidrotalcita parcialmente desidratada obtida por tratamento térmico de uma hidrotalcita sob uma condição específica, de modo que o seu peso é reduzido por 1,5 a 5%, o que é capaz de conferir resistência térmica aperfeiçoada a uma resina sintética.
Abstract:
The present invention relates to a method for protecting a hydrogen separation membrane from particulate contaminants in the process of producing or purifying hydrogen by using the separation membrane. The protection layer, wherein a cermet is formed by coating a ceramic and a metal able to cause surface movement of hydrogen molecules and hydrogen atoms to the surface of the separation membrane, plays the role of blocking contact between the separation membrane and particles (contaminant or catalyst) contained in the gas. In this way, it is possible to improve the durability of the hydrogen separation membrane and to minimize effects on the hydrogen permeability of the separation membrane.
Abstract:
The present invention relates to a micro-channel reactor for producing synthetic natural gas, and more particularly, to a micro-channel reactor for producing synthetic natural gas containing methane gas from synthetic gas, including a porous nickel plate catalyst part.
Abstract:
A front substrate for a plasma display panel (PDP) and an associated fabrication method are provided. An upper dielectric layer of the front substrate includes a colorant, which causes the dielectric layer to also act as a color filter. The resulting front substrate enhances at least one of color temperature, color purity, and/or contrast without increasing complexity or cost.
Abstract:
An exhaust gas recirculation system. A water jacket in a cylinder block is configured for coolant to flow therein. A cylinder head is attached to the cylinder block. A cylinder is disposed in the cylinder block and the cylinder head. An intake manifold runner is connected to an intake hole of the cylinder. An exhaust manifold runner is connected to an exhaust hole of the cylinder. A first recirculation gas pathway is disposed in the cylinder block, and receives recirculated exhaust gas from the exhaust manifold runner. A second recirculation gas pathway is disposed in the cylinder head, and has a first end connected to the first recirculation gas pathway and a second end connected to the intake manifold runner. A recirculation valve, mounted at the second recirculation gas pathway, controls supply of the recirculated exhaust gas to the intake manifold runner. An engine control unit controls the recirculation valve.
Abstract:
The present invention relates to an etching solution for evaluating crystal defects of silicon wafers, and more particularly to an etching solution comprising KMnO4 and HF. The etching solution for crystal defect evaluation of a silicon wafer in accordance with the present invention can accurately and quickly evaluate the crystal defects in silicon wafers having specific resistance values of 0.01 Ω·cm or smaller, which previously could only be evaluated by physical methods. Also, the etching solution of the present invention can quickly evaluate a D-defects in silicon wafers having specific resistance values exceeding 0.01 Ω·cm.
Abstract:
A front substrate for a plasma display panel (PDP) and an associated fabrication method are provided. An upper dielectric layer of the front substrate includes a colorant, which causes the dielectric layer to also act as a color filter. The resulting front substrate enhances at least one of color temperature, color purity, and/or contrast without increasing complexity or cost.
Abstract:
A dielectric composition and a fabrication method for a dielectric layer in a plasma display panel, by which contrast of the plasma display panel can be improved through simple fabrication processes. The dielectric composition for the dielectric layer in the plasma display panel comprises: a glass of P2O5—B2O3—ZnO group; and a filler consisting of Nd2O3.
Abstract:
The present invention relates to a hydrogen production module by an integrated reaction/separation process, and a hydrogen production reactor using the same, and more specifically, provides a hydrogen production apparatus which laminates a plurality of layered unit cells, is mounted in a pressure-resistant chamber, and can be operated at a high pressure, wherein the unit cell comprises a first modified catalyst, and a second modified catalyst opposite to a hydrogen separator. The hydrogen production module can produce hydrogen using a hydrocarbon, carbon monoxide and an alcohol as sources. Particularly, all the modified catalysts are formed into a porous metal plate form, thereby maximizing the heat transfer effect necessary for reaction. While a reaction and separation of hydrogen simultaneously occur, separated reactants permeate the first modified catalyst so as to come in contact with the same, and then pass through the gap between the hydrogen separator and the second modified catalyst opposite to each other. Therefore, it is possible to obtain a high efficiency over the equilibrium conversion rate of reaction temperature, and high purity hydrogen can be obtained.