公开(公告)号：US20160151739A1

公开(公告)日：2016-06-02

申请号：US14903186

申请日：2014-06-13

Applicant: Haldor Topsoe A/S

Inventor： Niklas Bengt Jakobsson ,  Claus Friis Pedersen

IPC: B01D53/22 ,  C25B15/08 ,  C25B1/00

CPC classification number: B01D53/228 ,  B01D53/22 ,  B01D63/06 ,  B01D63/08 ,  B01D2256/20 ,  B01D2257/504 ,  B01D2258/0208 ,  B01D2311/25 ,  C25B1/00 ,  C25B15/08 ,  Y02C10/10 ,  Y02P20/152

Abstract: A process for producing high purity carbon monoxide (CO) by membrane purification of CO produced in a solid oxide electrolysis cell (SOEC) comprises the steps of generating a gaseous mixture of CO and CO2 by SOEC electrolysis of CO2, applying a moderate pressure on the retentate side of the membrane in one or more membrane units connected to the exit of the SOEC via a compressor or an ejector, applying a lower pressure than the moderate pressure on the permeate side of the membrane, splitting the retentate stream, which is now enriched in CO, into two separate parts, expanding the first part of the retentate stream to reach the permeate low pressure conditions, leading the above-mentioned part of the retentate to the permeate side of the membrane to lower the partial pressure of CO2 on this side, and recycling the outlet permeate stream back to the SOEC as a feed gas together with fresh CO2. Preferably the membrane unit is designed with a tubular membrane or multiple planar membranes connected in series, and the retentate and permeate streams are operated in counter-current mode.

Abstract translation: 通过在固体氧化物电解池（SOEC）中生产的CO的膜纯化来生产高纯度一氧化碳（CO）的方法包括以下步骤：通过SOEC电解CO 2产生CO和CO 2的气体混合物，在 通过压缩机或喷射器连接到SOEC出口的一个或多个膜单元中的膜的滞留侧，施加比膜的渗透侧上的中等压力更低的压力，分离现在富集的滞留物流 在CO中分成两部分，使第一部分的渗余物流膨胀以达到渗透物低压条件，将上述部分的渗余物引导到膜的渗透侧，以降低该侧的二氧化碳分压 ，并将出口渗透物流与新鲜的CO 2一起作为进料气体回收到SOEC。 优选地，膜单元设计有串联连接的管状膜或多个平面膜，并且滞留物和渗透物流以逆流模式操作。