公开(公告)号：US5960777A

公开(公告)日：1999-10-05

申请号：US27035

申请日：1998-02-20

申请人： Stuart Marshall Nemser ,  Kevin Patrick Callaghan ,  Todd Colin Reppert

发明人： Stuart Marshall Nemser ,  Kevin Patrick Callaghan ,  Todd Colin Reppert

IPC分类号： F02M33/00 ,  B01D53/22 ,  B01D63/02 ,  B01D69/10 ,  B01D71/04 ,  C01B13/02 ,  C01B21/04 ,  F02B3/06 ,  F02D21/02 ,  F02M25/12 ,  F02B23/00

CPC分类号： F02M25/12 ,  B01D53/228 ,  F02B3/06 ,  Y02T10/121

摘要： A novel method of operating an internal combustion engine employs a selectively gas permeable membrane to provide either oxygen or nitrogen enriched air feed to beneficially affect engine performance. By feeding enriched air from a membrane unit such performance parameters as reduced NOx emissions, lean burn limit, engine power, and reduced cold start emissions can be enhanced relative to feeding ambient air. The selectively gas permeable membrane unit further includes a nonporous membrane (i) having an oxygen/nitrogen selectivity of at least 1.4 and a permeability to oxygen of at least 50 barrers; (ii) formed from an amorphous copolymer of perfluoro-2,2-dimethyl-1,3-dioxole; and (iii) being at a temperature below the glass transition temperature of the amorphous copolymer.A cylindrical module having many substantially parallel aligned small diameter hollow fiber membrane structures is ideally suited for carrying out the novel method. The apparatus can be configured to furnish only one of permeate fraction, oxygen enriched air or retentate fraction, nitrogen enriched air. Additionally, the apparatus can be configured to switch between oxygen and nitrogen enrichment modes.

摘要翻译： 一种操作内燃机的新方法采用选择性气体渗透膜，以提供富氧或氮气的空气进料，以有效地影响发动机性能。 通过从膜单元输送富集的空气，可以相对于进料环境空气来提高诸如降低的NOx排放，稀燃限制，发动机功率和降低的冷启动排放等性能参数。 选择性气体可渗透膜单元还包括无孔膜（i），其氧/氮选择性至少为1.4，氧气渗透性至少为50巴仑; （ii）由全氟-2,2-二甲基-1,3-二氧杂环戊烯的无定形共聚物形成; 和（iii）处于低于无定形共聚物的玻璃化转变温度的温度。 具有许多基本上平行排列的小直径中空纤维膜结构的圆柱形模块理想地适用于实现新颖的方法。 该装置可以被配置为仅提供渗透物馏分，富氧空气或滞留物馏分中的一种，富氮空气。 另外，该装置可以被配置为在氧气和氮气浓缩模式之间切换。

公开(公告)号：US06478852B1

公开(公告)日：2002-11-12

申请号：US09506636

申请日：2000-02-18

申请人： Kevin Patrick Callaghan ,  Stuart Marshall Nemser

发明人： Kevin Patrick Callaghan ,  Stuart Marshall Nemser

IPC分类号： B01D5322

CPC分类号： B01D53/22

摘要： A membrane separation process and apparatus for carrying out the process involves contacting a gas feed mixture with one side of a selectively gas permeable membrane and allowing the components to pass through the membrane to form a permeate composition in contact with the opposite side of the membrane and leave a retentate composition on the feed side of the membrane. The process includes introducing a sweep flow of feed gas into the permeate composition near the membrane at a rate effective to increase the enrichment of the retentate composition in the less preferentially permeable component of the feed mixture to a concentration much greater than is achieved without the sweep flow. This process is especially well suited to improve single stage membrane separation effectiveness so that the need for conventional multistage separations to achieve moderate to high purity retentate compositions can be obviated. The novel process is particularly useful for providing enriched air in the concentration range of 80-90 vol. % nitrogen.

摘要翻译： 用于进行该方法的膜分离方法和装置包括将气体进料混合物与选择性气体可渗透膜的一侧接触并允许组分通过膜以形成与膜的相反侧接触的渗透物组合物， 在膜的进料侧留下滞留组合物。 该方法包括以有效增加进料混合物的较不优先渗透的组分中的渗余物组合物的富集的速率将进料气体的吹扫流引入膜附近的渗透物组合物中，使其浓度远远大于不进行扫描 流。 该方法特别适用于提高单级膜分离效率，从而可以避免需要常规的多级分离以达到中等至高纯度的滞留物组合物。 该新方法特别可用于提供浓度范围为80-90vol。的富集空气。 ％ 氮。