Patent ID: 9702291
Date: 2017-07-11
CPC Classifications: B01D,F01N,Y02T

Claim:
1. An exhaust aftertreatment system comprising: a reductant tank; a reactor system receiving reductant from the reductant tank and outputting gas comprising ammonia; a storage tank receiving gas comprising ammonia from the reactor system and storing a volume of gas comprising ammonia; a first conduit communicating gas comprising ammonia from the reactor system to a stream of exhaust gas, the first conduit bypassing the storage tank; a second conduit communicating gas comprising ammonia from the storage tank to the stream of exhaust gas; and a third conduit communicating gas comprising ammonia from the reactor system to the storage tank, wherein the first and second conduits are fluidly coupled with an exhaust pipe at a location upstream of a catalyst in the stream of exhaust gas, wherein the catalyst is a selective catalytic reduction catalyst, further comprising a particulate filter and an oxidation catalyst, the particulate filter disposed upstream of the location, the oxidation catalyst disposed upstream of the particulate filter.