摘要:
Gaseous ammonia contaminated with sulphur, which may be in the form of hydrogen sulphide, mercaptans, sulphides or disulphides, produced during the processing of, for exemple, crude hydrocarbon oils or shale oil, or of coal or lignite, can be desulphurized by contacting the ammonia with a zinc oxide bed over an extended period of time and preferably at a temperature in the range from 500 to 850 °F (260-454 °C).
摘要:
The invention related to a material that can stably hold an imide anion (NH 2 - ) therein even in the atmosphere or in a solvent, and a method for synthesizing the material and a use of the material. A mayenite-type compound into which imide anions are incorporated at a concentration of 1 × 10 18 cm -3 or more are provided. The mayenite-type compound can be produced by heating a mayenite-type compound including electrons or free oxygen ions in a cage thereof, in liquefied ammonia at 450 to 700°C and at a pressure of 30 to 100 MPa. The compound has properties such that active imide anions can be easily incorporated into the compound and the active imide anions can be easily released in the form of ammonia from the compound, and the compound has chemical stability.
摘要:
A method for saturating or re-saturating ammonia storage material (1) capable of reversibly absorbing and desorbing ammonia in one or more storage containers (2), wherein said material is partly or fully depleted of ammonia, with ammonia to a predetermined saturation degree comprises a. placing the storage container(s) (2) in direct or indirect contact with a thermostatting medium (4) at a temperature level T T ‰¤ about 65 °C; and b. connecting the storage container(s) (2) to a source of gaseous ammonia wherein at least during a part of the method the gaseous ammonia during saturating or re-saturation of the ammonia storage material (1) is at a pressure P S ‰¤ P T , wherein P S is the ammonia pressure during saturating or re-saturating of the ammonia storage material (1) and P T is the equilibrium vapor pressure of liquid ammonia at the temperature level T T .
摘要:
Systems and methods for ammonia purification in the NH3 purification and liquefaction stage of a conventional two-column sour water stripping system using an adsorbent bed.
摘要:
Die Erfindung bezieht sich auf ein Material (10) und dessen Verwendung zur Speicherung von Ammoniak (NH 3 ) in einem Kraftfahrzeug mit NH 3 -basiertem, eine selektive katalytische Reduktion ermöglichenden Abgas-Nachbehandlungssystem. Das Material (10) befindet sich in einem Ammoniak-Tank, und weist Poren (12) auf, die einen realen Porendurchmesser (14) im Bereich zwischen 1,5 nm und 10 nm aufweisen, in denen Ammoniak bei reduziertem Druck gespeichert ist.