摘要:
The present invention relates to a composition including a β-type iron silicate, which includes all or part of iron in a β-type framework structure, and a solid acidic porous inorganic oxide. The present invention is characterized in that the β-type iron silicate is compounded with the porous inorganic oxide having solid acidic properties so that the solid acidic function derived from aluminum of the β-type iron silicate, is reinforced or complemented by the porous inorganic oxide, the individual particles of which are physically isolated from each other. It is preferred that the fluorine content relative to the dry weight of the β-type iron silicate is 400 ppm or less and the crystal particles of the β-type iron silicate have a truncated square bipyramidal morphology. According to the present invention, a composition that is useful as a high-performance catalyst, adsorbent, or the like, can be provided.
摘要:
The present invention relates to a composition including a β-type iron silicate, which includes all or part of iron in a β-type framework structure, and a solid acidic porous inorganic oxide. The present invention is characterized in that the β-type iron silicate is compounded with the porous inorganic oxide having solid acidic properties so that the solid acidic function derived from aluminum of the β-type iron silicate, is reinforced or complemented by the porous inorganic oxide, the individual particles of which are physically isolated from each other. It is preferred that the fluorine content relative to the dry weight of the β-type iron silicate is 400 ppm or less and the crystal particles of the β-type iron silicate have a truncated square bipyramidal morphology. According to the present invention, a composition that is useful as a high-performance catalyst, adsorbent, or the like, can be provided.
摘要:
A first catalyst for reducing nitrogen oxides comprising a crystalline silicate containing an iron in β-framework structure wherein a SiO2/Fe2O3 mol ratio is 20-300 and at least 80% of the contained iron is an isolated iron ion Fe3+. A second catalyst for reducing nitrogen oxides comprising a crystalline silicate containing an iron in β-framework structure wherein a SiO2/Fe2O3 mol ratio is 20-300 and log(SiO2/Al2O3) by mol is at least 2. A predominant part of the contained iron is isolated iron ion Fe3+ and at least a part thereof preferably has a tetrahedral coordination. These catalysts have high hydrothermal stability and exhibit enhanced activity for reducing nitrogen oxides by a reaction with a reducing agent such as ammonia, urea or an organic amine in a broad temperature range between lower temperature and higher temperature.
摘要翻译:一种用于还原氮氧化物的第一催化剂,包括含有铁的结晶硅酸盐,其中SiO 2 / Fe 2 O 3摩尔比为20-300,所含铁的至少80%为分离的铁离子Fe 3+。 用于还原氮氧化物的第二催化剂,其包含含有铁的结晶硅酸盐,其中SiO 2 / Fe 2 O 3摩尔比为20-300,并且log(SiO 2 / Al 2 O 3)摩尔比为至少2.主要部分为 含铁是分离的铁离子Fe3 +,其至少一部分优选具有四面体配位。 这些催化剂具有高水热稳定性,并且在较低温度和较高温度之间的宽温度范围内通过与还原剂如氨,脲或有机胺的反应来显示出增强的还原氮氧化物的活性。
摘要:
The invention relates to: a β-type iron silicate which has a fluorine content not more than 400 ppm by weight on a dry basis and in which the crystal grains have a truncated square bipyramidal morphology in an examination with a scanning electron microscope and the whole or part of the iron is contained in the β-type framework structure, and a process for producing the iron silicate; anther β-type iron silicate, and a process for producing the iron silicate; and a nitrogen oxide removal catalyst containing the other β-type iron silicate, a process for producing the catalyst, and a method for nitrogen oxide removal with the catalyst.
摘要:
The invention relates to: a β-type iron silicate which has a fluorine content not more than 400 ppm by weight on a dry basis and in which the crystal grains have a truncated square bipyramidal morphology in an examination with a scanning electron microscope and the whole or part of the iron is contained in the β-type framework structure, and a process for producing the iron silicate; anther β-type iron silicate, and a process for producing the iron silicate; and a nitrogen oxide removal catalyst containing the other β-type iron silicate, a process for producing the catalyst, and a method for nitrogen oxide removal with the catalyst.
摘要:
A first catalyst for reducing nitrogen oxides comprising a crystalline silicate containing an iron in β-framework structure wherein a SiO2/Fe2O3 mol ratio is 20-300 and at least 80% of the contained iron is an isolated iron ion Fe3+. A second catalyst for reducing nitrogen oxides comprising a crystalline silicate containing an iron in β-framework structure wherein a SiO2/Fe2O3 mol ratio is 20-300 and log (SiO2/Al2O3) by mol is at least 2. A predominant part of the contained iron is isolated iron ion Fe3+ and at least a part thereof preferably has a tetrahedral coordination. These catalysts have high hydrothermal stability and exhibit enhanced activity for reducing nitrogen oxides by a reaction with a reducing agent such as ammonia, urea or an organic amine in a broad temperature range between lower temperature and higher temperature.
摘要翻译:用于还原氮氧化物的第一催化剂,其包含含有β-骨架结构中的铁的结晶硅酸盐,其中SiO 2 / Fe 2 O 3摩尔比为20-300,所含铁的至少80%是分离的铁离子Fe 3+。 用于还原氮氧化物的第二催化剂,其包含含有β-骨架结构中的铁的结晶硅酸盐,其中SiO 2 / Fe 2 O 3摩尔比为20-300,对数(SiO 2 / Al 2 O 3)为至少2.所含有的主要部分 铁是分离的铁离子Fe 3+,并且其至少一部分优选具有四面体配位。 这些催化剂具有高水热稳定性,并且在较低温度和较高温度之间的宽温度范围内通过与还原剂如氨,脲或有机胺的反应来显示出增强的还原氮氧化物的活性。