Method and system for anhydrous ammonia recovery

US9211493B2 · kind B2 · utility

Assignee

• SAES PURE GAS, INC. · US

Inventors

• Charles H. Applegarth · San Luis Obispo, US
• Lawrence A. Rabellino · Atascadero, US
• Sarah Vogt · Grover Beach, US
• Marco Succi · Milano, IT
• Cristian Landoni · Novara, IT

Key dates

• Filing date: Nov 20, 2013
• Grant date: Dec 15, 2015
• Expiry date: Nov 20, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2220/42
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An apparatus for recycling exhaust gas includes a vessel containing a reversible ammonia sorber material which is exothermic when sorbing (“loading”) ammonia and which is endothermic when releasing (“unloading”) ammonia. A first valve selectively couples a source of exhaust gas including ammonia to a first port of the vessel, a second valve selectively couples a vacuum pump to the vessel, and a third valve selectively coupling a second port of the vessel to an output. A controller opens and closes the first valve, the second valve and the third valve to implement a loading phase, an intermediate venting phase and an unloading phase for the vessel.