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Ammonia Assessment Method

A solid ammonia, storage unit technology, applied in the field of saturation systems

Active Publication Date: 2017-06-30
INT ENGINE INTPROP CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The storage unit is equipped with a heater to release the ammonia

Method used

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  • Ammonia Assessment Method
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Embodiment Construction

[0015] Various examples of embodiments of the present technology will now be described in more detail with reference to the accompanying drawings, in which such examples of embodiments are shown. Like reference numerals refer to like elements throughout. However, other implementations of the inventive technology can take many different forms and are not limited to the implementations shown herein. Rather, these embodiments are examples representing the technology of the present invention. The full scope of rights and interests based on the present invention is shown by the claims.

[0016] figure 1 Shown is a schematic diagram of an embodiment of an exemplary ammonia storage and dosing system 10 . In the illustrated embodiment, the ammonia storage and dosing system 10 includes a main storage unit 12 and a start-up storage unit 14 . exist figure 1 In the example shown, the main storage unit 12 consists of a single storage vessel, which holds ammonia storage material. It s...

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Abstract

A method for determining the degree of saturation of solid ammonia storage material in a storage unit includes activating a heater to release ammonia from the storage material until the pressure of the storage unit reaches a predetermined pressure. The method then deactivates the heater and determines a rate of decay of the pressure of the storage unit while the heater is deactivated. The method assesses the saturation of an ammonia storage medium in response to the decay rate. According to some embodiments, determining the decay rate may include measuring a time required for the pressure of the storage unit to fall from a first pressure threshold to a second pressure threshold.

Description

technical field [0001] The present application relates to a method for determining the degree of saturation of a reversible solid ammonia storage material in a storage unit, and to a system for determining the degree of saturation of the solid ammonia storage material in a storage unit. Background technique [0002] Selective catalytic reduction (SCR) is commonly used to remove NO from exhaust gases produced by internal combustion engines such as diesel or other lean-burn (gasoline) engines x (ie, oxides of nitrogen). In such systems, NO is continuously removed from the exhaust gas by x : Into the ability to achieve NO x The reducing agent is injected into the exhaust gas before the high conversion SCR catalyst. [0003] Ammonia is commonly used as a reducing agent in SCR systems. Ammonia is introduced into the exhaust gas by controlled injection of gaseous ammonia, aqueous ammonia or indirectly as urea dissolved in water. SCR catalysts located in the exhaust gas stream...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/00
CPCF01N3/2066F01N11/00F01N2610/02F01N2610/06F01N2900/1808Y02T10/12Y02T10/40G01N7/16
Inventor A·C·莱克N·辛格M·J·米勒
Owner INT ENGINE INTPROP CO LLC