Patent ID: 9567884
Date: 2017-02-14
CPC Classifications: F01N,Y02T

Claim:
1. An ammonia generating device to treat exhaust gases of internal combustion engines comprising: an outer casing comprising a single hollow and hermetic body defining a receiving chamber configured to receive a main reservoir and a secondary reservoir, the main reservoir having a main body capable of releasing ammonia by desorption and the secondary reservoir having a secondary body capable of releasing ammonia by desorption, the main reservoir being able to reload the secondary body in the secondary reservoir with ammonia during a re-saturation step; an outlet in the outer casing that fluidly connects the secondary reservoir to an exhaust line, and wherein the main reservoir and the secondary reservoir are serially arranged such that the main reservoir is fluidly connected to the outlet only through the secondary reservoir; a heater capable of heating the bodies in each reservoir to trigger off the desorption of ammonia; a connector located within the outer casing, the connector to connect the main reservoir to the secondary reservoir and being capable of allowing circulation of the released ammonia from the main reservoir to the secondary reservoir, wherein the heater comprises first and second heating devices installed inside the main reservoir and the secondary reservoir respectively and operating independently; and wherein the main reservoir is thermally decoupled from the secondary reservoir to generate a temperature gradient between both reservoirs so that the released ammonia in the main reservoir is adsorbed by the secondary body in the secondary reservoir during the re-saturation step.