Patent SG-11201907475Y-A (SG)
Title: Pulsed power supply for sustainable redox agent supply for hydrogen abatement during electrochemical hypochlorite generation
Inventor: GU GEORGE Y
IPC: C02F1/467
Filed: 2018-03-06
Abstract: Pulseshapes - -2- -4 50 100 150 200 250 Time(sec) FIG. 10A ct O 00 O O (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 13 September 2018 (13.09.2018) WIP0 I PCT IiiimmomiolollmonolomomuloolionoimovoimIE (10) International Publication Number WO 2018/165092 Al (51) International Patent Classification: C25B 1/26 (2006.01) CO2F 1/467 (2006.01) C25B 1/34 (2006.01) C25B 9/06 (2006.01) C25B 15/02 (2006.01) (21) International Application Number: PCT/US2018/021044 (22) International Filing Date: 06 March 2018 (06.03.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/467,518 06 March 2017 (06.03.2017) US 62/468,544 08 March 2017 (08.03.2017) US 62/469,224 09 March 2017 (09.03.2017) US (71) Applicant: EVOQUA WATER TECHNOLOGIES LLC [US/US]; 210 Sixth Avenue, Suite 3300, Pittsburgh, Penn- sylvania 01851 (US). (72) Inventors: GU, George Y.; 4 Mulberry Circle, Andover, Massachusetts 01810 (US). DUKES, Simon Paul; 10 Wig- gin Street, Chelmsford, Massachusetts 01824 (US). GRIF- FIS, Joshua; 20 Whitney Drive, Ashburnham, Massachu- setts 01430 (US). SHAW, Michael J.; 6 Pingree Hill Road, Deny, New Hampshire 03038 (US). (74) Agent: WILKINS, Frederick C.; 10 Technology Drive, Lowell, Massachusetts 01851 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (54) Title: PULSED POWER SUPPLY FOR SUSTAINABLE REDOX AGENT SUPPLY FOR HYDROGEN ABATEMENT DURING ELECTROCHEMICAL HYPOCHLORITE GENERATION (57) : A method of operating an electrochemical cell including introducing an aqueous solution into the electrochemical cell, applying a current across an anode and a cathode to produce a product, monitoring the voltage, dissolved hydrogen, or a condition of the aqueous solution, and applying the current in a pulsed waveform responsive to one of the measured parameters is disclosed. An electrochemical system including an electrochemical cell including an anode and a cathode, a source of an aqueous solution having an outlet fluidly connectable to the electrochemical cell, a sensor for measuring a parameter, and a controller configured to cause the anode and the cathode to apply the current in a pulsed waveform responsive to the parameter measurement is disclosed. Methods of suppressing accumulation of hydrogen gas within the electrochemical cell are also disclosed. Methods of facilitating operation of an electrochemical cell are also disclosed. [Continued on next page] WO 2018/165092 Al MIDEDIM011010EIREEM311111111111110111111111111111111111111111111111 (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: with international search report (Art. 21(3)) before the expiration of the time limit for amending the claims and to be republished in the event of receipt of amendments (Rule 48.2(h))