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    • 6. 发明申请
    • ADSORPTION PROCESS TO RECOVER CARBON DIOXIDE FROM FLUE GAS
    • 从燃气回收二氧化碳的吸附过程
    • WO2013191696A1
    • 2013-12-27
    • PCT/US2012/043474
    • 2012-06-21
    • PRAXAIR TECHNOLOGY, INC.KUMAR, RaviROSINSKI, Andrew, C.
    • KUMAR, RaviROSINSKI, Andrew, C.
    • B01D53/047
    • B01D53/0476B01D2253/102B01D2253/106B01D2253/108B01D2256/22B01D2257/102B01D2258/0283B01D2259/40033B01D2259/40039B01D2259/40062B01D2259/40064B01D2259/40073B01D2259/403B01D2259/404B01D2259/4062B01D2259/65
    • The present invention generally relates to vacuum pressure swing adsorption (VPSA) processes and apparatus to recover carbon dioxide having a purity of approximately ≥80 mole percent from streams containing at least carbon dioxide and nitrogen, such as the gaseous products of combustion (i.e. flue gas). The feed to the CO 2 VPSA can be at superambient pressure. The CO 2 VPSA unit produces a CO 2 product stream. The process cycle generates a high-pressure product stream that can be used to generate power for compressing the feed stream. The recovered CO 2 can be further upgraded, sequestered or used in applications such as enhanced oil recovery (EOR). BACKGROUND OF THE INVENTION Many industrial operations employ combustion of fuel. Examples include kilns, incinerators, glassmaking furnaces, coal-fired power plants, and the like. Combustion of fuel produces streams of gaseous combustion products that comprise at least carbon dioxide, usually accompanied by nitrogen and one or more of oxygen, oxides of nitrogen and/or sulfur, and carbon monoxide. It would be desirable to provide economically beneficial processes and apparatus for CO 2 recovery. It would further be desirable for such processes and apparatus to be more efficient and easier to use relative to the prior art.
    • 本发明一般涉及真空变压吸附(VPSA)方法和装置,用于从至少含二氧化碳和氮气的物流(例如燃烧气体产物)(即烟道)回收纯度约> 80%摩尔百分比的二氧化碳 加油站)。 CO2 VPSA的进料可能处于超压状态。 CO2 VPSA单元产生二氧化碳产物流。 过程循环产生可用于产生用于压缩进料流的动力的高压产物流。 回收的二氧化碳可以进一步升级,隔离或用于强化采油(EOR)等应用。 背景技术许多工业操作采用燃料燃烧。 实例包括窑炉,焚烧炉,玻璃制造炉,燃煤发电厂等。 燃料燃烧产生气态燃烧产物流,其至少包含二氧化碳,通常伴随着氮气和一种或多种氧,氮和/或硫的氧化物和一氧化碳。 提供经济有益的二氧化碳回收方法和设备是理想的。 对于这些方法和装置来说,进一步希望相对于现有技术更有效和更易于使用。
    • 10. 发明申请
    • CONTAMINANT MITIGATION IN PSA AIR FRACTIONATION
    • PSA空气分离中的污染物减少
    • WO2011123210A1
    • 2011-10-06
    • PCT/US2011/026799
    • 2011-03-02
    • WEARAIR OXYGEN, INC.KNAEBEL, Seth, Pemberton
    • KNAEBEL, Seth, Pemberton
    • B01D53/04
    • B01D53/047B01D53/02B01D2253/108B01D2256/12B01D2257/102B01D2257/80B01D2259/40001B01D2259/40062B01D2259/40066B01D2259/402B01D2259/4148
    • Disclosed is a method for subjecting feed air to fractionation for recovery of a product oxygen fraction therefrom in a pressure swing adsorption (PSA) process utilizing a nitrogen-selective adsorbent ("NSA") that is sensitive to water. The PSA process includes the steps of feed pressurization, production, equalization, and blowdown. The improvement to this PSA process commences with placing a bed of pre-treatment adsorbent between feed air and a bed of NSA. Next, a controllable valve is interposed between the pre-treatment adsorbent bed and the NSA bed. Finally, the controllable valve is kept closed during the steps of production, equalization, and when the process is idle. An advantageous NSA is LiX zeolite, Li- LSX zeolite, CaX zeolite, and similar adsorbents, particularly highly hydrophilic zeolites. Another feature of the disclosed PSA cycle is that the pre-treatment adsorbent bed blows-down while the NSA bed equalizes.
    • 公开了一种使用对水敏感的氮选择性吸附剂(“NSA”)的变压吸附(PSA)方法对进料空气进行分馏以从其中回收产物氧馏分的方法。 PSA方法包括进料加压,生产,均衡和排污的步骤。 PSA过程的改进开始于在进料空气和NSA床之间放置预处理吸附剂床。 接下来,在预处理吸附床和NSA床之间插入可控阀。 最后,可控阀在生产步骤,均衡阶段以及过程空闲时保持关闭。 有利的NSA是LiX沸石,Li-LSX沸石,CaX沸石和类似的吸附剂,特别是高度亲水的沸石。 所公开的PSA循环的另一个特征是在NSA床平衡的同时,预处理吸附剂床吹扫。