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    • 18. 发明授权
    • Reduction of gas phase reduced nitrogen species in partial burn FCC processes
    • 部分燃烧FCC工艺中减少气相减少了氮物质
    • US07906015B2
    • 2011-03-15
    • US11238745
    • 2005-09-29
    • George YalurisJohn Allen Rudesill
    • George YalurisJohn Allen Rudesill
    • C10G11/00
    • B01D53/8621B01D53/96Y02P30/446
    • Reduced emissions of gas phase reduced nitrogen species in the off gas of an FCC regenerator operated in a partial or incomplete mode of combustion is achieved by contacting the off gas with an oxidative catalyst/additive composition having the ability to reduce gas phase nitrogen species to molecular nitrogen and to oxidize CO under catalytic cracking conditions. The oxidative catalyst/additive composition is used in an amount less than the amount necessary to prevent afterburn. Fluidizable particles of the oxidative catalyst/additives are circulated throughout the partial or incomplete burn FCC unit along with the FCC catalyst inventory. The flue gas having a reduced content of gas phase reduced nitrogen species and NOx is passed to a downstream CO boiler, preferably a low NOx CO boiler. In the CO boiler, as CO is oxidized to CO2, a reduced amount of gas phase reduced nitrogen species is oxidized to NOx, thereby providing an increase in the overall reduction of NOx emitted into the environment.
    • 通过使脱气与具有将气相氮物质还原成分子的能力的氧化催化剂/添加剂组合物接触来实现在部分或不完全燃烧模式下操作的FCC再生器的废气中减少的气相排放减少的氮物质 并在催化裂化条件下氧化CO。 氧化催化剂/添加剂组合物的用量小于防止后燃烧所需的量。 氧化催化剂/添加剂的可流化颗粒与FCC催化剂库存一起循环遍及部分或不完全燃烧的FCC单元。 具有减少的氮气种类的气相含量降低的烟道气被排放到下游CO锅炉,优选低NOx CO锅炉。 在CO锅炉中,当CO被氧化成CO 2时,减少的氮气种类的气相被氧化成NOx,从而提高了排放到环境中的NO x的总体还原。
    • 19. 发明授权
    • NOx reduction compositions for use in FCC processes
    • 用于FCC工艺的NOx还原组合物
    • US07030055B2
    • 2006-04-18
    • US10837846
    • 2004-05-03
    • George YalurisJohn Allen Rudesill
    • George YalurisJohn Allen Rudesill
    • B01J23/00B01J23/40B01J23/42B01J23/44B01J21/00
    • B01J35/023B01D53/8628B01J21/12B01J23/10B01J23/58B01J23/63B01J29/08B01J35/0006B01J35/1019B01J37/0045C10G11/182Y02P30/446
    • Compositions for reduction of gas phase reduced nitrogen species and NOx generated during a partial or incomplete combustion catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise (i) an acidic metal oxide containing substantially no zeolite, (ii) an alkali metal, alkaline earth metal, and mixtures thereof, (iii) an oxygen storage component, and (iv) a noble metal component, preferably rhodium or iridium, and mixtures thereof, are disclosed. Preferably, the compositions are used as separate additives particles circulated along with the circulating FCC catalyst inventory. Reduced emissions of gas phase reduced nitrogen species and NOx in an effluent off gas of a partial or incomplete combustion FCC regenerator provide for an overall NOx reduction as the effluent gas stream is passed from the FCC regenerator to a CO boiler, whereby as CO is oxidized to CO2 a lesser amount of the reduced nitrogen species is oxidized to NOx.
    • 公开了在部分或不完全燃烧催化裂化过程中产生的气相还原氮和NO x的组合物,优选流化催化裂化过程。 组合物包含(i)基本上不含沸石的酸性金属氧化物,(ii)碱金属,碱土金属及其混合物,(iii)储氧组分,和(iv)贵金属组分,优选铑或 铱及其混合物。 优选地,组合物用作与循环FCC催化剂库存一起循环的单独的添加剂颗粒。 在部分或不完全燃烧的FCC再生器的排出物气体中减少的气相排放减少了氮物质和NO x,从而提供了总体NO x SO 2还原作为流出气流 从FCC再生器传递到CO锅炉,由此当CO被氧化成CO 2时,较少量的还原氮物质被氧化成NO 2。