US 8,771,598 B2Granted

Ammonia storage system

AssigneeSensirion AG

InventorsFelix Mayer, Mark Hornung, Lukas Bürgi, Pascal Gerner

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Abstract

A system for storing ammonia comprises gas detector that is able to detect gases other than ammonia. The system further comprises thermally activatable ammonia stores, which can be activated to release ammonia upon heating. When the ammonia stores are not heated, the system is below ambient pressure and any leak will cause external gas to enter the system. Therefore, the gas detector is used to detect the presence of such external gas, which allows to detect leaks. The gas detector may be embodied as a thermal detector using a single heater and two temperature sensors for detecting a gas flow as well as external gas.

Claims20

Dependent claims

An ammonia storage system comprising:

an ammonia containing section;
a thermally activatable ammonia store disposed in said ammonia containing section;
a valve, wherein opening of the valve allows ammonia gas to flow out of the ammonia containing section through the valve and wherein when said valve is closed, in the absence of a leak, the ammonia containing section contains pure ammonia;
a duct of the ammonia containing section connecting the ammonia store to the valve;
a heater for thermally activating said ammonia store, wherein thermal activation of the ammonia store by the heater releases ammonia into said ammonia containing section, and further comprising
a gas detector disposed in the ammonia containing section at the duct and configured to detect a thermal conductivity of gas within the ammonia containing section;
wherein the system is adapted to issue an alert if the detector detects a thermal conductivity different from the thermal conductivity of pure ammonia.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/653,490Filed 15 Dec 2009
Priority: EP 090000242 Jan 2009
Published: US 2010/0172816 A18 Jul 2010
Granted: 8 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F01N 3/2066
Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing…:…
F01N 2560/023
The means being an exhaust gas sensor: for measuring or detecting HC
F01N 2560/025
The means being an exhaust gas sensor: for measuring or detecting O2, e.g. lambda sensors
F01N 2610/14
Adding substances to exhaust gases: arrangements for the supply of substances, e.g. conduits

Family

US 2010/0172816 A1Pre-grant publication · published 8 Jul 2010
US 8,771,598 B2This patent

From the US filing history. Foreign family members aren’t listed.

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