摘要:
To provide an SO3 reduction catalyst for purifying an exhaust gas capable of efficiently reducing the amount of SO3 that is present in a combustion exhaust gas and is a starting substance of S-containing substances such as acid ammonium sulfate causing deterioration of performance of the catalyst or corrosion of apparatuses disposed downstream of the catalyst, or capable of controlling the generation of SO3 in the catalyst itself; a preparation process of the catalyst; and an exhaust gas purifying method using the catalyst.In the catalyst for purifying a combustion exhaust gas containing nitrogen oxides, 50 wt. % or greater of the amount of Ru and/or Ir to be supported is adjusted to fall within a depth of 150 μm from the surface layer of a substrate; and the catalyst is prepared by immersing the substrate in a metal colloid solution of Ru and/or Ir to be supported or an aqueous solution containing at least one compound selected from compounds of Ru and/or Ir to be supported.
摘要:
An object of the present invention is to provide a method for producing a catalyst for treating exhaust gas, enabling a smaller amount of a noble metal to be supported and reducing the production cost thereof. There is provided a method for producing a catalyst for treating an exhaust gas containing carbon monoxide and volatile organic compounds, wherein the method comprises: preparing, as a pH buffer solution, an aqueous metal salt solution in which at least one metal salt is dissolved; reductively-treating the aqueous metal salt solution while keeping the pH constant to prepare a metal colloid solution; and immersing a carrier in the metal colloid solution to support the metal on the carrier. The supported amount of metal may be 0.7 g/L or less per one of the metals.
摘要:
A catalyst for purifying an exhaust gas containing carbon monoxide and volatile organic compounds, which has a coat layer of a carrier composed of a porous inorganic compound, wherein the coat layer is a single layer, the porous inorganic compound has a BET specific surface area of 50 m2/g or greater, and the coat layer has, within a 50 μm depth from the surface thereof, an active metal having a particle size of 15 nm or less and composed of at least one noble metal.
摘要:
A catalyst for purifying an exhaust gas containing carbon monoxide and volatile organic compounds, which has a coat layer of a carrier composed of a porous inorganic compound, wherein the coat layer is a single layer, the porous inorganic compound has a BET specific surface area of 50 m2/g or greater, and the coat layer has, within a 50 μm depth from the surface thereof, an active metal having a particle size of 15 nm or less and composed of at least one noble metal.
摘要:
The invention provides a discharge gas treatment catalyst which can effectively decreases NOx and SO3 contained in a discharge gas. The discharge gas treatment catalyst, for removing nitrogen oxide and sulfur trioxide from a discharge gas, includes a carrier which is formed of titania-tungsten oxide and which carries ruthenium, and a titania-tungsten oxide-based NOx removal catalyst serving as a substrate which is coated with the carrier. When a discharge gas to which ammonia has been added and which contains SO3 and NOx is brought into contact with the catalyst, decomposition of ammonia is suppressed by ruthenium, and reduction of SO3 and NOx contained in the discharge gas is promoted, whereby SO3 concentration and NOx concentration can be further decreased.
摘要:
The invention provides a discharge gas treatment catalyst which can effectively decreases NOx and SO3 contained in a discharge gas. The discharge gas treatment catalyst, for removing nitrogen oxide and sulfur trioxide from a discharge gas, includes a carrier which is formed of titania-tungsten oxide and which carries ruthenium, and a titania-tungsten oxide-based NOx removal catalyst serving as a substrate which is coated with the carrier. When a discharge gas to which ammonia has been added and which contains SO3 and NOx is brought into contact with the catalyst, decomposition of ammonia is suppressed by ruthenium, and reduction of SO3 and NOx contained in the discharge gas is promoted, whereby SO3 concentration and NOx concentration can be further decreased.
摘要翻译:本发明提供一种放电气体处理催化剂,其能够有效地降低放电气体中所含的NO x和SO 3。 用于从放电气体中除去氮氧化物和三氧化硫的放电气体处理催化剂包括由二氧化钛 - 氧化钨形成并载有钌的载体和二氧化钛 - 氧化钨基的NO x >去除催化剂用作涂覆有载体的基材。 当已经加入氨并且含有SO 3和NO x x的放电气体与催化剂接触时,通过钌抑制氨的分解和还原 包含在放电气体中的SO 3 3和NO x x N被促进,由此SO 3浓度和NO x浓度 可以进一步降低。
摘要:
In the NH3 injection rate control method for an NOx removal apparatus, operating area of the apparatus is divided into first area in which molar ratio of NH3 injection rate with respect to NOx flow rate at an inlet of the apparatus is smaller than molar ratio at minimum point where NOx concentration assumes minimum value and second area in which the molar ratio is equal to or larger than the minimum point molar ratio, and virtual NOx concentration with respect to the molar ratio is set according to virtual characteristic line which varies monotonically to stride across desired operating point without rising with increase of the molar ratio from the first area to the second area. Moreover, feedback control is implemented for adjusting the NH3 injection rate with respect to the NOx flow rate in direction that the virtual NOx concentration is brought close to the desired NOx concentration.
摘要:
A pair of hook-and-loop fasteners are attached onto a carton for securing a lid thereof. First fasteners are provided spaced apart along a first exfoliation sheet. Second fasteners adapted to mate and engage with the first fasteners are provided spaced apart along a second exfoliation sheet. The first sheet is deflected over a first knife edge to peel-off a first fastener and engage it onto a second fastener to form a fastener pair. The second sheet is deflected over a second knife edge to peel-off the second fastener of the pair from the second sheet and adhesively stick the fastener pair onto the carton.
摘要:
A pair of hook-and-loop fasteners are attached onto a carton for securing a lid thereof. First fasteners are provided spaced apart along a first exfoliation sheet. Second fasteners adapted to mate and engage with the first fasteners are provided spaced apart along a second exfoliation sheet. The first sheet is deflected over a first knife edge to peel-off a first fastener and engage it onto a second fastener to form a fastener pair. The second sheet is deflected over a second knife edge to peel-off the second fastener of the pair from the second sheet and adhesively stick the fastener pair onto the carton.
摘要:
An ink jet printing method uses an ink jet ejecting portion for ejecting ink on a printing material and a print quality improving liquid ejecting portion for ejecting print quality improving liquid on the printing material. The application mode of the print quality improving liquid is different depending on the printing mode in which a printing operation is carried out.