公开(公告)号：US20140318972A1

公开(公告)日：2014-10-30

申请号：US14325423

申请日：2014-07-08

Applicant: Massachusetts Institute of Technology

Inventor： Martin Zdenek Bazant ,  EthelMae Victoria Dydek ,  Daosheng Deng ,  Ali Mani

IPC: C02F1/469

CPC classification number: C02F1/4695 ,  B01D61/42 ,  B01D61/425 ,  B01D61/427 ,  B01D61/44 ,  B01D61/445 ,  B01D61/46 ,  B01D61/48 ,  B01D61/485 ,  B01D61/50 ,  B01D63/06 ,  B01D2313/345 ,  C02F1/46109 ,  C02F1/46114 ,  C02F1/469 ,  C02F1/4691 ,  C02F1/4693 ,  C02F1/4698 ,  C02F2001/46161 ,  C02F2201/4611 ,  C02F2201/46115 ,  C02F2201/4613 ,  C02F2201/46165 ,  C02F2305/08 ,  Y02A20/131 ,  Y02A20/134 ,  Y02W10/37

Abstract: A liquid electrolyte can be desalinated and purified using a system that includes a first electrode and a configuration selected from (a) a second electrode and at least one distinct ion-selective boundary and (b) a second electrode that also serves as the ion-selective boundary. The ion-selective boundary is contained in the liquid conduit adjacent to a porous medium that defines pore channels filled with the liquid and that have a surface charge, and the charge of the ion-selective boundary and the surface charge of the pore channels share the same sign. A liquid including at least one charged species flows through the pore channels, forming a thin diffuse electrochemical double layer at an interface of the liquid and the charged surface of the pore channels. A voltage differential is applied between the electrodes across the porous medium to draw ions in the liquid to the electrodes to produce brine at the electrodes and to create a shock in the dissolved-ion concentration in the bulk volume of the liquid within the pore channels, wherein a depleted zone with a substantially reduced concentration of dissolved ions forms in the liquid bulk volume between the shock and the ion-selective boundary.

Abstract translation: 可以使用包括第一电极和选自（a）第二电极和至少一个不同的离子选择性边界的构造的系统对液体电解质进行脱盐和纯化，以及（b）也用作离子交换膜的第二电极， 选择性边界。 离子选择性边界包含在与多孔介质相邻的液体管道中，该多孔介质限定填充有液体的孔隙通道，并且具有表面电荷，并且孔隙通道的离子选择性边界和表面电荷的电荷共享 相同的标志。 包含至少一种带电荷的物质的液体流过孔道，在液体和孔道的带电表面的界面处形成薄的漫射电化学双层。 在电极之间穿过多孔介质施加电压差以将液体中的离子吸引到电极以在电极处产生盐水并且产生在孔隙通道内的液体的体积体积中的溶解离子浓度的冲击， 其中在冲击和离子选择性边界之间的液体本体体积中形成具有基本上降低的溶解离子浓度的贫化区。

公开(公告)号：US08999132B2

公开(公告)日：2015-04-07

申请号：US14325423

申请日：2014-07-08

Applicant: Massachusetts Institute of Technology

Inventor： Martin Zdenek Bazant ,  EthelMae Victoria Dydek ,  Daosheng Deng ,  Ali Mani

IPC: B01D61/48 ,  C02F1/469 ,  B01D61/42 ,  B01D61/44 ,  B01D61/46 ,  B01D61/50 ,  B01D63/06 ,  C02F1/461

CPC classification number: C02F1/4695 ,  B01D61/42 ,  B01D61/425 ,  B01D61/427 ,  B01D61/44 ,  B01D61/445 ,  B01D61/46 ,  B01D61/48 ,  B01D61/485 ,  B01D61/50 ,  B01D63/06 ,  B01D2313/345 ,  C02F1/46109 ,  C02F1/46114 ,  C02F1/469 ,  C02F1/4691 ,  C02F1/4693 ,  C02F1/4698 ,  C02F2001/46161 ,  C02F2201/4611 ,  C02F2201/46115 ,  C02F2201/4613 ,  C02F2201/46165 ,  C02F2305/08 ,  Y02A20/131 ,  Y02A20/134 ,  Y02W10/37

Abstract: A liquid electrolyte can be desalinated and purified using a system that includes a first electrode and a configuration selected from (a) a second electrode and at least one distinct ion-selective boundary and (b) a second electrode that also serves as the ion-selective boundary. The ion-selective boundary is contained in the liquid conduit adjacent to a porous medium that defines pore channels filled with the liquid and that have a surface charge, and the charge of the ion-selective boundary and the surface charge of the pore channels share the same sign. A liquid including at least one charged species flows through the pore channels, forming a thin diffuse electrochemical double layer at an interface of the liquid and the charged surface of the pore channels. A voltage differential is applied between the electrodes across the porous medium to draw ions in the liquid to the electrodes to produce brine at the electrodes and to create a shock in the dissolved-ion concentration in the bulk volume of the liquid within the pore channels, wherein a depleted zone with a substantially reduced concentration of dissolved ions forms in the liquid bulk volume between the shock and the ion-selective boundary.

Abstract translation: 可以使用包括第一电极和选自（a）第二电极和至少一个不同的离子选择性边界的构造的系统对液体电解质进行脱盐和纯化，以及（b）也用作离子交换膜的第二电极， 选择性边界。 离子选择性边界包含在与多孔介质相邻的液体管道中，该多孔介质限定填充有液体的孔隙通道，并且具有表面电荷，并且孔隙通道的离子选择性边界和表面电荷的电荷共享 相同的标志。 包含至少一个带电荷的物质的液体流过孔道，在液体和孔道的带电表面的界面处形成薄的漫反射电化学双层。 在电极之间穿过多孔介质施加电压差以将液体中的离子吸引到电极以在电极处产生盐水并且产生在孔隙通道内的液体的体积体积中的溶解离子浓度的冲击， 其中在冲击和离子选择性边界之间的液体本体体积中形成具有基本上降低的溶解离子浓度的贫化区。