US 12,246,284 B2
Systems and methods for plasma-based remediation
Stephen B. Cronin, Los Angeles, CA (US); Sriram Subramanian, Los Angeles, CA (US); Tom Huiskamp, Los Angeles, CA (US); Alec Nystrom, Los Angeles, CA (US); and William Schroeder, Los Angeles, CA (US)
Assigned to UNIVERSITY OF SOUTHERN CALIFORNIA, Los Angeles, CA (US); and TAI CHONG CHEANG STEAMSHIP CO. (H.K.) LIMITED, Hong Kong (CN)
Appl. No. 17/437,683
Filed by UNIVERSITY OF SOUTHERN CALIFORNIA, Los Angeles, CA (US); and TAI CHONG CHEANG STEAMSHIP CO. (H.K.) LIMITED, Hong Kong (CN)
PCT Filed Mar. 11, 2020, PCT No. PCT/US2020/022172
§ 371(c)(1), (2) Date Sep. 9, 2021,
PCT Pub. No. WO2020/185951, PCT Pub. Date Sep. 17, 2020.
Claims priority of provisional application 62/816,694, filed on Mar. 11, 2019.
Prior Publication US 2022/0184551 A1, Jun. 16, 2022
Int. Cl. B01D 53/32 (2006.01); B01D 53/92 (2006.01); F01N 3/08 (2006.01)
CPC B01D 53/32 (2013.01) [B01D 53/92 (2013.01); F01N 3/0892 (2013.01); B01J 2219/0809 (2013.01); B01J 2219/0815 (2013.01); B01J 2219/0824 (2013.01); B01J 2219/0849 (2013.01); F01N 2240/28 (2013.01); H05H 2245/17 (2021.05)] 11 Claims
OG exemplary drawing
 
1. A system for chemically altering an NOx concentration of an exhaust stream, comprising:
an exhaust inlet port;
an exhaust outlet port;
first and second parallel elongate conduits fluidly coupling the exhaust inlet port to the exhaust outlet port;
a pulse voltage source;
a voltage connector disposed between the first and second parallel elongate conduits, said voltage connector electrically coupled to the pulse voltage source, said voltage connector comprising a first tapered, insulating end protruding into an interior of the first elongate conduit and a second tapered, insulating end protruding into an interior of the second elongate conduit;
a first electrically conductive member extending through the first tapered, insulating end and a second electrically conductive member extending through the second tapered, insulating end; and
a first electrode aligned axially within the first elongate conduit and electrically coupled to the first electrically conductive member and a second electrode aligned axially within the second elongate conduit and electrically coupled to the second electrically conductive member;
wherein said pulse voltage source is configured to produce a transient plasma within the first and second elongate parallel conduits; and
wherein said transient plasma is adapted to remove a portion of NOx flowing from the exhaust inlet port to the exhaust outlet port.