摘要:
A method for controlling the magnitude of mechanical forces exerted by a solid ammonia storage material on walls of a container : determining a mechanical-strength limit of the container in terms of a hydraulic pressure P LIMIT or force F LIMIT under which the walls of container do not undergo plastic deformation, or deformation of more than 200% of deformation at the yield point; using a correlation between a temperature T SAT for the ammonia saturation/resaturation process, and the hydraulic pressure P MAT , or F MAT generated by the storage material during saturation/resaturation, to identify a minimum temperature T SATMIN where P MAT , or F MAT is kept below the limit for the mechanical strength by carrying out the saturation/resaturation process at the temperature T SAT fulfilling the condition of T SAT ‰¥ T SATMIN .
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:
A method for controlling the magnitude of mechanical forces exerted by a solid ammonia storage material on walls of a container : determining a mechanical-strength limit of the container in terms of a hydraulic pressure P LIMIT or force F LIMIT under which the walls of container do not undergo plastic deformation, or deformation of more than 200% of deformation at the yield point; using a correlation between a temperature T SAT for the ammonia saturation/resaturation process, and the hydraulic pressure P MAT , or F MAT generated by the storage material during saturation/resaturation, to identify a minimum temperature T SATMIN where P MAT , or F MAT is kept below the limit for the mechanical strength by carrying out the saturation/resaturation process at the temperature T SAT fulfilling the condition of T SAT ≥ T SATMIN .
摘要:
Structure de stockage d'ammoniac, caractérisée en ce qu'elle comprend une alternance : - d'au moins une couche de stockage d'ammoniac, et - d'au moins une couche d'un matériau thermiquement conducteur de conductivité thermique supérieure à celle de la couche de stockage, l'au moins une couche de matériau thermiquement conducteur étant destinée à augmenter les transferts thermiques au sein de la structure.
摘要:
SCR method for the exhaust gases of an internal combustion engine, according to which: - an ammonia precursor is stored in a storage tank (1) - part of this precursor is thermally decomposed either directly prior to or while being metered into the exhaust gases - at least intermittently and parallel to or in alternation therewith, ammonia released from a solid storage medium where it is stored by sorption is also metered in the exhaust gases, said ammonia having been generated by thermally decomposing a stream of the stored ammonia precursor in a heater (3), wherein no fluid is returned from the heater to the storage tank and wherein: - either the thermal decomposition of the ammonia precursor generates no water - or the thermal decomposition of the ammonia precursor generates water which is separated from the ammonia and collected.
摘要:
Solid metal ammine complexes are applied for safe and high-density storage of ammonia to be released for use as reducing agent in selective catalytic reduction of NOx in exhaust gases. The compositional formula of the metal ammine complexes is M(NH3)nXz, where MZ+ represents one or more metal ions capable of binding ammonia, X represents one or more anions, n is the coordination number (from 2 to 12), and z the valency of the metal ion (and thus the total number of compensating anion charges). Ammonia is released by generating a reduced gas-phase pressure of ammonia inside the container, which is below the equilibrium desorption pressure of ammonia at the operating temperature of the storage material thus enabling the unit to be operated is a safe manner with lower operating temperature and pressure.
摘要:
La présente invention porte sur un matériau composite pour le stockage et l'alimentation en ammoniac destiné à réduire la quantité de NOx dans les gaz d'échappement d'un véhicule à moteur par SCR. Le matériau composite comporte un ou plusieurs sels comprimés avec du graphite expansé, lequel est utilisé comme liant de manière à obtenir une matrice poreuse destinée à recevoir de l'ammoniac afin de former des complexes chimiques de formule générale Ma(NH3) n X m ; où M est un ou plusieurs cations métalliques alcalins comme Li, Na, K ou Cs, ou métalliques alcalino-terreux comme Mg, Ca, Sr ou Ba, ou métalliques de transition comme V, Cr, Fe, Co, Ni, Cu ou Zn ; où X est un ou plusieurs anions de type fluorure, bromure, ou chlorure, où a est le nombre de cations et m est le nombre d'anions par molécule de sel, et n est le nombre de coordination du complexe pouvant être compris entre 2 et 12.