摘要:
Provided is an exhaust gas treatment catalyst including: a de-NOx catalyst; and a coating layer being provided on a surface of the de-NOx catalyst and containing at least one selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates.In a method for regenerating an exhaust gas treatment catalyst of the present invention, the coating layer of the de-NOx catalyst on which VOSO4 is deposited is removed with an acid, and after the removal of the coating layer, a coating layer containing at least one selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates is again provided.
摘要:
A denitrification catalyst regeneration method comprises heat-treating a used denitrification catalyst, then cleaning the denitrification catalyst with an aqueous solution of oxalic acid, and then finish washing the denitrification catalyst with water to regenerate the denitrification catalyst.
摘要:
A denitrification catalyst regeneration method comprises heat-treating a used denitrification catalyst, then cleaning the denitrification catalyst with an aqueous solution of oxalic acid, and then finish washing the denitrification catalyst with water to regenerate the denitrification catalyst.
摘要:
A catalyst for nitrogen oxide removal, which catalytically reduces nitrogen oxides in an exhaust gas in the presence of ammonia, comprises: a first component comprising an oxide of titanium, an oxide of tungsten, and an oxide of vanadium; and a second component comprising an oxide of manganese, or an oxide of manganese and an oxide of copper.
摘要:
A regenerated exhaust gas treatment catalyst (17) can be produced by coarsely grinding a used exhaust gas treatment catalyst (11); separating a coarsely ground material into coarse pieces (12) and a fine powder (13); finely grinding the coarse pieces (12); kneading the fine powder together with other raw materials, molding a kneaded material, and drying and burning a molded material to produce a base material (14); grinding a fresh exhaust gas treatment catalyst (15); forming a slurry solution of the ground product of the fresh exhaust gas treatment catalyst (15); coating the surface of the base material (14) with the slurry solution (16); and drying the base material (14) that has been coated with the slurry solution (16) and burning the base material (14) at a temperature higher than the burning temperature employed in the production of the exhaust gas treatment catalyst (15).
摘要:
The present invention is to provide a catalyst for removing nitrogen oxides which is capable of keeping sufficient denitrification performance, i.e., a high removal rate of nitrogen oxides in exhaust gas having a high NO2 content especially under conditions where the ratio of NO2/NO in exhaust gas is 1 or higher, a catalyst molded product therefor, and an exhaust gas treating method. The catalyst is designed for removing nitrogen oxides, which is used to denitrify exhaust gas containing nitrogen oxides having a high NO2 content, which comprises: at least one kind of oxide selected from the group consisting of copper oxides, chromium oxides, and iron oxides as a component for reducing NO2 to NO; and which further comprises: at least one kind of titanium oxide; at least one kind of tungsten oxide; and at least one kind of vanadium oxide as components for reducing NO to N2.
摘要:
A denitrification catalyst regeneration method comprises heat-treating a used denitrification catalyst, then cleaning the denitrification catalyst with an aqueous solution of oxalic acid, and then finish washing the denitrification catalyst with water to regenerate the denitrification catalyst.
摘要:
The present invention is to provide a catalyst for removing nitrogen oxides which is capable of keeping sufficient denitrification performance, i.e., a high removal rate of nitrogen oxides in exhaust gas having a high NO2 content especially under conditions where the ratio of NO2/NO in exhaust gas is 1 or higher, a catalyst molded product therefor, and an exhaust gas treating method. The catalyst is designed for removing nitrogen oxides, which is used to denitrify exhaust gas containing nitrogen oxides having a high NO2 content, which comprises: at least one kind of oxide selected from the group consisting of copper oxides, chromium oxides, and iron oxides as a component for reducing NO2 to NO; and which further comprises: at least one kind of titanium oxide; at least one kind of tungsten oxide; and at least one kind of vanadium oxide as components for reducing NO to N2.
摘要:
The present invention is to provide a catalyst for removing nitrogen oxides which is capable of keeping sufficient denitrification performance, i.e., a high removal rate of nitrogen oxides in exhaust gas having a high NO2 content especially under conditions where the ratio of NO2/NO in exhaust gas is 1 or higher, a catalyst molded product therefor, and an exhaust gas treating method. The catalyst is designed for removing nitrogen oxides, which is used to denitrify exhaust gas containing nitrogen oxides having a high NO2 content, which comprises: at least one kind of oxide selected from the group consisting of copper oxides, chromium oxides, and iron oxides as a component for reducing NO2 to NO; and which further comprises: at least one kind of titanium oxide; at least one kind of tungsten oxide; and at least one kind of vanadium oxide as components for reducing NO to N2.
摘要:
The present invention is to provide a catalyst for removing nitrogen oxides which is capable of keeping sufficient denitrification performance, i.e., a high removal rate of nitrogen oxides in exhaust gas having a high NO2 content especially under conditions where the ratio of NO2/NO in exhaust gas is 1 or higher, a catalyst molded product therefor, and an exhaust gas treating method. The catalyst is designed for removing nitrogen oxides, which is used to denitrify exhaust gas containing nitrogen oxides having a high NO2 content, which comprises: at least one kind of oxide selected from the group consisting of copper oxides, chromium oxides, and iron oxides as a component for reducing NO2 to No; and which further comprises: at least one kind of titanium oxide; at least one kind of tungsten oxide; and at least one kind of vanadium oxide as components for reducing NO to N2.