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    • 5. 发明申请
    • REDUCTION OF OXIDES OF NITROGEN IN A GAS STREAM USING BORON-CONTAINING MOLECULAR SIEVE CHA
    • 使用含硼分子筛CHA在气流中减少氮氧化物
    • WO2009064725A3
    • 2009-07-16
    • PCT/US2008083124
    • 2008-11-11
    • CHEVRON USA INCYUEN LUN-TEHZONES STACEY I
    • YUEN LUN-TEHZONES STACEY I
    • B01D53/86B01D53/56C01B39/48
    • B01D53/9418B01D2255/50B01J29/86Y02T10/24
    • A process for reduction of oxides of nitrogen contained in a gas stream comprising contacting the gas stream with a boron-containing molecular sieve, the boron-containing molecular sieve having the CHA crystal structure and comprising (1) silicon oxide and (2) boron oxide or a combination of boron oxide and aluminum oxide, iron oxide, titanium oxide, gallium oxide and mixtures thereof; and wherein the mole ratio of silicon oxide to boron oxide in said boron-containing molecular sieve is between 15 and 125. A method for reduction of oxides of nitrogen, comprising a) selecting the boron-containing molecular sieve; and b) contacting a gas stream with the molecular sieve. A method for reduction of oxides, comprising: a) selecting the boron-containing molecular sieve containing a metal or metal ions capable of catalyzing the reduction of the oxides of nitrogen; and b) contacting an exhaust stream of an internal combustion engine with the molecular sieve.
    • 一种还原包含在气流中的氮氧化物的方法,包括使气流与含硼分子筛接触,所述含硼分子筛具有CHA晶体结构,并且包含(1)氧化硅和(2)氧化硼 或氧化硼和氧化铝的组合,氧化铁,氧化钛,氧化镓及其混合物; 并且其中所述含硼分子筛中的氧化硅与氧化硼的摩尔比为15至125.一种还原氮氧化物的方法,包括:a)选择含硼分子筛; 和b)使气体流与分子筛接触。 一种还原氧化物的方法,包括:a)选择含有能够催化还原氮的氧化物的金属或金属离子的含硼分子筛; 和b)使内燃机的废气流与分子筛接触。