Abstract:
A method of determining an average degree of saturation with ammonia (X) of a solid ammonia storage medium porous or not and capable of ad- or absorbing and desorbing ammonia reversibly in a storage container is described. A part of the volume (Vcon) of the container is occupied by gaseous ammonia of a pressure (p) and defines a free volume (Vfree)). Ammonia flows out of the container with a flow (f). n pairs ((fi, pi), (Fi, pi)) of flows (fi), or accumulated flows (Fi), and pressures (pi) are sampled at a sequence of points of time (ti), i=1 . . . n and n≧2; an estimate volume value (Vfit) on the basis of the sampled pairs ((fi, pi), (Fi, pi)) is determined;and the degree of saturation with ammonia (X) is determined by applying a predetermined relationship (Rel) between a plurality of estimate volume values (Vfit) and a plurality of values of the average degree of saturation with ammonia (X) to the determined estimate volume value (Vfit).
Abstract:
A method of determining an average degree of saturation with ammonia (X) of a solid ammonia storage medium porous or not and capable of ad- or absorbing and desorbing ammonia reversibly in a storage container is described. A part of the volume (Vcon) of the container is occupied by gaseous ammonia of a pressure (p) and defines a free volume (Vfree)). Ammonia flows out of the container with a flow (f). n pairs ((fi, pi), (Fi, pi)) of flows (fi), or accumulated flows (Fi), and pressures (pi) are sampled at a sequence of points of time (ti), i=1 . . . n and n≧2; an estimate volume value (Vfit) on the basis of the sampled pairs ((fi, pi), (Fi, pi)) is determined;and the degree of saturation with ammonia (X) is determined by applying a predetermined relationship (Rel) between a plurality of estimate volume values (Vfit) and a plurality of values of the average degree of saturation with ammonia (X) to the determined estimate volume value (Vfit).
Abstract:
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 TT≦ 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 PS≦ about PT, wherein PS is the ammonia pressure during saturating or re-saturating of the ammonia storage material (1) and PT is the equilibrium vapor pressure of liquid ammonia at the temperature level TT.
Abstract:
A solid ammonia storage and delivery material comprising an ammonia absorbing/desorbing solid material, said storage and delivery material having been compacted to a density above 50% of the theoretic skeleton density provides a solid ammonia storage material which is easy to produce and handle and has a very high density of stored ammonia which is readily released under controlled conditions even though the porosity of the material is very low, and which storage material is safe for storage and transport of ammonia without special safety measures.
Abstract:
A solid ammonia storage and delivery material comprising an ammonia absorbing/desorbing solid material, said storage and delivery material having been compacted to a density above 50% of the theoretic skeleton density provides a solid ammonia storage material which is easy to produce and handle and has a very high density of stored ammonia which is readily released under controlled conditions even though the porosity of the material is very low, and which storage material is safe for storage and transport of ammonia without special safety measures.
Abstract:
A system for storing ammonia in and releasing ammonia from a storage material capable of binding and releasing ammonia reversibly by adsorption or absorption for a process with a gradual ammonia demand that can vary over the time. The system has a container capable of housing the ammonia-containing storage material; a heating source arranged to supply heat for the desorption of ammonia from the solid storage medium; and a controller arranged to control the heating source to release ammonia. The heating source is arranged inside the container and surrounded by ammonia storage material. A controllable dosing valve is arranged to dose released ammonia according to the ammonia demand. The controller comprises a feed-forward control arranged to control the heat supplied by the heating source, based on the ammonia demand.
Abstract:
An electric power generating unit comprising (i) an ammonia storage device in the form of a container comprising an ammonia absorbing and releasing salt of the general formula: Ma(NH3)nXz, wherein M is one or more cations selected from alkali metals, alkaline earth metals, and transition metals such as Li, K, Mg, Ca, V, Cr, Mn, Fe, Co, Ni, Cu or Zn, X is one or more anions selected from fluoride, chloride, bromide, iodide, nitrate, thiocyanate, sulphate, molybdate, phosphate, and chlorate ions, a is the number of cations per salt molecule, Z is the number of anions per salt molecule, and n is the coordination number of 2 to 12. (ii) means for heating said container and ammonia absorbing and releasing salt for releasing ammonia gas and (iiia) a fuel cell for converting ammonia directly into electric power; or (iiib1) a reactor for dissociating ammonia into hydrogen and nitrogen and (iiib2) a fuel cell for converting hydrogen into electric power is useful for large stationary energy producing facilities, but also for use for is useful for large stationary energy producing facilities, but also for use for small rechargeable and/or replaceable power supply units for micro-fabricated or miniaturized ammonia decomposition reactors for use in mobile units and portable devices may be used for large energy producing facilities, and by use of small rechargeable and/or replaceable ammonia storage decomposition reactors, it is also possible to provide energy for mobile units and portable devices.
Abstract translation:一种发电单元,包括(i)包含氨吸收和释放盐的容器形式的氨储存装置,其具有以下通式:Ma(NH 3)n N 其中M是选自碱金属,碱土金属和过渡金属如Li,K,Mg,Ca,V,Cr,Mn,Fe,Co中的一种或多种阳离子, Ni,Cu或Zn,X是选自氟化物,氯化物,溴化物,碘化物,硝酸盐,硫氰酸盐,硫酸盐,钼酸盐,磷酸盐和氯酸根离子中的一种或多种阴离子,a是每个盐分子的阳离子数,Z是数 的阴离子,n是2〜12的配位数。(ii)加热所述容器和氨吸收和释放氨以释放氨气的装置和(iiia)用于将氨直接转化为电力的燃料电池的装置; 或(iiib1)用于将氨离解成氢和氮的反应器和(iib2)用于将氢转化为电力的燃料电池对于大型固定能量生产设备是有用的,但也用于大型固定能量生产设施,但是 也可用于用于移动单元和便携式设备的微型或微型氨分解反应堆的小型可再充电和/或可更换电源单元,可用于大型能源生产设备,并可使用小型可再充电和/或可更换氨 存储分解反应器,还可以为移动单元和便携式设备提供能量。