System and method for using ultramicroporous carbon for the selective removal of nitrate with capacitive deionization

Campbell, Patrick; Hernandez, Maira Ceron; Hawks, Steven; Loeb, Colin; Pham, Tuan Anh; Stadermann, Michael

Title: System and method for using ultramicroporous carbon for the selective removal of nitrate with capacitive deionization

Patent · Tue Jun 14 00:00:00 EDT 2022

OSTI ID:1893030

Campbell, Patrick; Hernandez, Maira Ceron; Hawks, Steven; Loeb, Colin; Pham, Tuan Anh; Stadermann, Michael

The present disclosure relates to a flow through electrode, capacitive deionization (FTE-CDI) system which is able to adsorb nitrates from water being treated using the system. The system makes use of a pair of electrodes arranged generally parallel to one another, with a water permeable dielectric sandwiched between the electrodes. The electrodes receive a direct current voltage from an electrical circuit. At least one of the electrodes is formed from a carbon material having a hierarchical pore size distribution which includes a first plurality of pores having a width of no more than about 1 nm, and a second plurality of micro-sized pores. The micron-sized pores enable a flow of water to be pushed through the electrodes while the first plurality of pores form adsorption sites for nitrate molecules carried in the water flowing through the electrodes.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC52-07NA27344

Assignee:: Lawrence Livermore National Security, LLC (Livermore, CA)

Patent Number(s):: 11,358,883

Application Number:: 16/268,154

OSTI ID:: 1893030

Resource Relation:: Patent File Date: 02/05/2019

Country of Publication:: United States

Language:: English

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