发明名称 |
SCR CATALYSTS HAVING IMPROVED LOW TEMPERATURE PERFORMANCE, AND METHODS OF MAKING AND USING THE SAME |
摘要 |
SCR-active molecular-sieve based catalysts with improved low-temperature performance are made by heating a molecular-sieve in a non-oxidizing atmosphere with steam (hydrothermal treatment), or in a reducing atmosphere without steam (thermal treatment), at a temperature in the range of 600-900° C. for a time period from 5 minutes to two hours. The resulting SCR-active iron-containing molecular sieves exhibit a selective catalytic reduction of nitrogen oxides with NH3 or urea at 250° C. that is at least 50% greater than if the iron-containing molecular-sieve were calcined at 500° C. for two hours without performing the hydrothermal or thermal treatment. |
申请公布号 |
US2015246346(A1) |
申请公布日期 |
2015.09.03 |
申请号 |
US201514633777 |
申请日期 |
2015.02.27 |
申请人 |
JOHNSON MATTHEY PUBLIC LIMITED COMPANY |
发明人 |
CHANDLER Guy Richard;COLLIER Jillian Elaine;GREEN Alexander Nicholas Michael;DURAN-MARTIN Desiree;PHILLIPS Paul Richard;RAJARAM Raj Rao;REID Stuart David |
分类号 |
B01J29/072;B01J29/68;C01B39/44;C01B39/02;C01B39/54;B01J29/85;B01J29/46 |
主分类号 |
B01J29/072 |
代理机构 |
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代理人 |
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主权项 |
1. A method of making an SCR-active molecular sieve-based catalyst, the method comprising performing a hydrothermal treatment on an iron-containing molecular sieve in a non-oxidizing atmosphere, or a thermal treatment on an iron-containing molecular sieve in a reducing atmosphere, at a temperature in the range of 600-900° C. for a time period from 5 minutes to two hours. |
地址 |
London GB |