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Release of stored ammonia at start-up

一种氨释放、释放出的技术，应用在储存和定量供给的系统领域

Inactive Publication Date: 2011-08-31
AMMINEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

storage unit containing ammonia storage material

Method used

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  • Release of stored ammonia at start-up
  • Release of stored ammonia at start-up
  • Release of stored ammonia at start-up

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] figure 1 is a schematic diagram illustrating one embodiment of an ammonia storage and dosing system with a start-up storage unit and a main storage unit. However, as we continue to describe in further detail figure 1 Before, some content will be discussed.

[0023] WO 1999 / 01205 discloses ammonia stored in a storage chamber. However, in the context of the present invention, it has been recognized that doing a quick start (in which case ammonia will be delivered after a short operating time) can be challenging if all stored material is placed in one large container . It has been recognized that making the whole system more modular is a means of reducing the challenges of having one large container (hereinafter, modules are also referred to as "containers" or "units"). The main challenge with having a single large container is that it requires relatively more energy (and thus relatively more time) to bring the temperature of the storage material up to the point where ...

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Abstract

A system for storage and dosing of ammonia, includes a solid ammonia storage material capable of binding and releasing ammonia reversibly by adsorption / absorption. The system is able to release ammonia gradually according to a demand that can vary over time with intermediate periods of no ammonia demand. A main storage unit and a start-up storage unit are provided. The storage units hold ammonia storage material. At least one one-way valve is provided via which the one main storage unit is in communication with the start-up storage unit. The one-way valve prevents any back-flow of ammonia from the start-up storage unit to the main storage unit. Heating devices are arranged to heat the main storage unit and the startup storage unit separately to generate gaseous ammonia by thermal desorption from the solid storage material. A controller controls the heating power of the main storage unit and the start-up storage unit, thereby enabling ammonia release from the start-up and / or the main storage units. A dosing valve controls ammonia flow from the storage units according to a demand.

Description

technical field [0001] The present invention relates to a system and method for storage and dosing of ammonia. Background technique [0002] Ammonia is a widely used chemical in many applications. Some of these applications are (but not limited to): a) for NO in exhaust gases from combustion processes x Reductant for Selective Catalytic Reduction (SCR), b) ammonia used as energy carrier for fuel cells or c) ammonia used as reducing agent or additive in chemical reactions. Storing ammonia in containers as a pressurized liquid is dangerous for most applications, and storage methods involving absorption into solids circumvent the safety hazards of anhydrous liquid ammonia. [0003] Metal amine salts are ammonia-absorbing materials that can be used as solid-state storage media for ammonia (see e.g. WO 2006 / 012903A2), which in turn can be used e.g. as reducing agents in selective catalytic reduction to reduce NO x Emissions, see eg WO 1999 / 01205. [0004] Typically, ammonia ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/00B01D53/94F01N3/20H01M8/04H01M8/06H01M8/22
CPCB01D2258/014B01D2251/2062H01M8/222F01N2610/06F01N2610/10C01C1/006Y02E60/50B01D2258/012F01N2900/1808H01M8/04216H01M8/0606Y02T10/24F01N2610/1406F01N3/208B01D2258/018F01N2610/02Y02T10/12
Inventor 约翰尼·约翰森扬·奥克斯勒亨宁·施密特图厄·乔安内森雅各布·斯瓦金
Owner AMMINEX
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