WO2016080090A1 - Appareil d'absorption/de désorption d'ammoniac - Google Patents

Appareil d'absorption/de désorption d'ammoniac Download PDF

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Publication number
WO2016080090A1
WO2016080090A1 PCT/JP2015/078097 JP2015078097W WO2016080090A1 WO 2016080090 A1 WO2016080090 A1 WO 2016080090A1 JP 2015078097 W JP2015078097 W JP 2015078097W WO 2016080090 A1 WO2016080090 A1 WO 2016080090A1
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Prior art keywords
ammonia
container
storage material
ammonia storage
particles
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PCT/JP2015/078097
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English (en)
Japanese (ja)
Inventor
浩康 河内
河村　清美
近藤　照明
山内　崇史
研二 森
Original Assignee
株式会社豊田自動織機
株式会社豊田中央研究所
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Application filed by 株式会社豊田自動織機, 株式会社豊田中央研究所 filed Critical 株式会社豊田自動織機
Publication of WO2016080090A1 publication Critical patent/WO2016080090A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/02—Preparation, purification or separation of ammonia
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C11/00—Use of gas-solvents or gas-sorbents in vessels

Definitions

  • the present invention relates to an ammonia absorption / release device.
  • a device described in Patent Document 1 is known as a conventional ammonia absorption / release device.
  • the ammonia storage / release device described in Patent Document 1 includes an ammonia storage material that stores ammonia and releases ammonia by heating, an ammonia storage tank that stores the ammonia storage material, and an ammonia storage material that is stored in the ammonia storage tank. And a heater for heating.
  • the ammonia occlusion material When ammonia is occluded in the ammonia occlusion material, the ammonia occlusion material expands in volume and a surface pressure acts on the ammonia occlusion tank. At this time, if the surface pressure acting on the ammonia storage tank is too high, the ammonia storage tank may be damaged. Therefore, it is necessary to increase the thickness of the ammonia storage tank. However, increasing the thickness of the ammonia storage tank increases the size of the ammonia storage tank and increases the weight of the ammonia storage tank.
  • An object of the present invention is to provide an ammonia storage / release device capable of reducing the thickness of the container and reducing the size and weight of the container by reducing the surface pressure acting on the container containing the ammonia storage material. It is.
  • the inventors of the present invention reduced the particle size of the ammonia storage material contained in the container, and when ammonia was stored in the ammonia storage material, the ammonia was stored by volume expansion of the ammonia storage material. The fact that the surface pressure acting on the storage tank is low has been found, and the present invention has been completed.
  • an ammonia storage / release apparatus is an ammonia storage / release apparatus including an ammonia storage material that stores ammonia and releases ammonia by heat, and a container that stores the ammonia storage material.
  • D maximum particle diameter of the occlusion material particles
  • Pal Pal
  • the ammonia storage material when ammonia is stored in the ammonia storage material, the ammonia storage material expands in volume. At this time, since the maximum particle diameter D of the ammonia storage material particles is 58.4 ⁇ Pal 0.51 or less, it is considered that other particles easily enter the gaps between the particles and the surface pressure acting on the container is reduced. It is done. Since the surface pressure acting on the container is reduced in this manner, the thickness of the container can be reduced to reduce the size and weight of the container.
  • the maximum particle diameter D of the ammonia storage material particles may be 102 ⁇ m or less.
  • the surface pressure acting on the container during the volume expansion of the ammonia storage material can be suppressed to 3 MPa or less.
  • the ammonia storage material may contain any of MgCl 2 , SrCl 2 and MgBr 2 .
  • the maximum particle diameter D of the ammonia storage material particles is set to 58.4 ⁇ Pal 0.51 or less, the surface pressure acting on the container can be reliably reduced.
  • An ammonia storage / release apparatus is an ammonia storage / release apparatus including an ammonia storage material that stores ammonia and releases ammonia by heat, and a container that stores the ammonia storage material.
  • an ammonia storage / release apparatus including an ammonia storage material that stores ammonia and releases ammonia by heat, and a container that stores the ammonia storage material.
  • T thickness
  • ⁇ safety factor
  • ⁇ allowable stress of the material of the container
  • ⁇ MPa
  • the maximum particle diameter of the ammonia occlusion material is D ( ⁇ m)
  • T ⁇ ⁇ ⁇ L ⁇ (D / 58.4) (1 / 0.51) / 2 / ⁇ It is characterized by satisfying.
  • the ammonia storage material expands in volume.
  • T ⁇ ⁇ ⁇ L ⁇ (D / 58.4) (1 / 0.51) / 2 / ⁇ is satisfied, by reducing the maximum particle diameter D of the ammonia storage material particles, The lower limit value of the thickness T becomes smaller.
  • the maximum particle diameter D of the ammonia storage material particles is reduced, it is considered that other particles easily enter the gaps between the particles, and the surface pressure acting on the container is reduced. Thereby, thickness of a container can be made small and reduction in size and weight of a container can be achieved.
  • T ⁇ ⁇ ⁇ L ⁇ (D / 58.4) (1 / 0.51) / 2 / ⁇ is satisfied, the strength of the container can be ensured.
  • the maximum particle diameter D of the ammonia storage material particles may be 102 ⁇ m or less. The strength of the container can be reliably ensured.
  • the ammonia absorption-and-release apparatus which can reduce the thickness of a container and can attain the size reduction of a container is provided. .
  • FIG. 1 is a schematic configuration diagram illustrating an exhaust purification system including an embodiment of an ammonia absorption / release device.
  • FIG. 2 is a schematic diagram illustrating a state before and after NH 3 is stored in the ammonia storage material in the ammonia storage / release apparatus illustrated in FIG.
  • FIG. 3 is an image diagram showing a state of change of the ammonia storage material when the ammonia storage material expands in volume and a surface pressure acts on the container.
  • FIG. 4 is a graph showing the relationship between the elapsed time from the start of occlusion of NH 3 in the ammonia occlusion material and the surface pressure acting on the container.
  • FIG. 1 is a schematic configuration diagram illustrating an exhaust purification system including an embodiment of an ammonia absorption / release device.
  • FIG. 2 is a schematic diagram illustrating a state before and after NH 3 is stored in the ammonia storage material in the ammonia storage / release apparatus illustrated in FIG.
  • FIG. 3 is an image diagram
  • FIG. 5 is an image diagram showing a change in the ammonia storage material when the volume of the ammonia storage material expands when the particle size of the particles of the ammonia storage material is reduced.
  • FIG. 6 is a cross-sectional view of the surface pressure measuring device.
  • FIG. 7 is a graph showing the relationship between the particle size of MgCl 2 particles as the ammonia storage material, the elapsed time from the start of storage of NH 3 in the ammonia storage material, and the surface pressure acting on the container.
  • FIG. 8 is a diagram showing sieving using a mesh as an example of a method for defining the maximum particle size of ammonia storage material particles.
  • FIG. 9 is a graph showing the relationship between the maximum particle size of MgCl 2 particles as the ammonia storage material and the maximum surface pressure acting on the container.
  • FIG. 10 is a graph showing the maximum surface pressure acting on the container when the maximum particle diameter of particles of MgCl 2 , SrCl 2 and MgBr 2 that are ammonia storage materials is 210 ⁇ m.
  • FIG. 11 is a schematic configuration diagram showing a modified example of the exhaust purification system shown in FIG. 12 is a cross-sectional view of the heat exchanger with a reaction part shown in FIG.
  • FIG. 1 is a schematic configuration diagram showing an exhaust purification system provided with an embodiment of an ammonia absorption / release device.
  • an exhaust purification system 1 is provided in an exhaust system of a diesel engine 2 (hereinafter simply referred to as “engine 2”) of a vehicle, and purifies harmful substances (environmental pollutants) contained in exhaust gas discharged from the engine 2. To do.
  • the exhaust purification system 1 includes a diesel oxidation catalyst (DOC) 4, a diesel exhaust particulate filter (DPF) 5, a selective reduction catalyst (SCR: Selective Catalytic Reduction) 6, and an ammonia slip catalyst. (ASC: Ammonia Slip Catalyst) 7.
  • DOC diesel oxidation catalyst
  • DPF diesel exhaust particulate filter
  • SCR Selective Catalytic Reduction
  • ASC Ammonia Slip Catalyst
  • the DOC 4, DPF 5, SCR 6, and ASC 7 are arranged in order from the upstream side to the downstream side in the exhaust passage 8 connected to the engine 2.
  • the DOC 4 oxidizes and purifies HC and CO contained in the exhaust gas.
  • the DPF 5 collects particulate matter (PM) contained in the exhaust gas and removes PM from the exhaust gas.
  • the SCR 6 reduces and purifies NOx contained in the exhaust gas with ammonia (NH 3 ).
  • ASC7 oxidizes NH 3 passing through the SCR6.
  • the exhaust purification system 1 is configured to supply the ammonia absorption / release device 10 of the present embodiment, the ammonia injector 12 for injecting NH 3 into the exhaust gas flowing through the exhaust passage 8, and supplying NH 3 to the ammonia absorption / release device 10.
  • an ammonia introduction pipe 13 for connecting the ammonia absorption / release apparatus 10 to the ammonia supply source 11 and an ammonia lead-out pipe 14 for connecting the ammonia absorption / release apparatus 10 and the ammonia injector 12 are provided.
  • the ammonia inlet pipe 13 and the ammonia outlet pipe 14 are provided with on-off valves 15 and 16 for opening and closing the NH 3 flow path, respectively.
  • Ammonia storage and release device 10 as also shown in FIG. 2, a container 17 as ammonia storage tank is housed within the container 17, powdery ammonia releasing NH 3 by heat as well as absorbing the NH 3 And an occlusion material 18.
  • 2A shows a normal state of the ammonia storage material 18
  • FIG. 2B shows a state in which the ammonia storage material 18 is volume-expanded.
  • the container 17 has a base portion 17b, a cylindrical side wall portion 17a integrated with the base portion 17b, and a lid portion 17c fixed to the upper end of the side wall portion 17a.
  • the side wall portion 17a has a cylindrical shape (a cylindrical shape with a circular cross section) or a rectangular shape (a cylindrical shape with a rectangular cross section).
  • the shape of the side wall part 17a is cylindrical
  • the shape of the base part 17b and the cover part 17c is circular.
  • the shape of the side wall portion 17a is a quadrangular cylindrical shape
  • the shape of the base portion 17b and the lid portion 17c is a quadrangular shape.
  • the container 17 is made of, for example, stainless steel. The thickness of the container 17 will be described later in detail.
  • magnesium chloride (MgCl 2 ), strontium chloride (SrCl 2 ), or magnesium bromide (MgBr 2 ) is used as the ammonia storage material 18.
  • MgCl 2 magnesium chloride
  • strontium chloride (SrCl 2 ) strontium chloride
  • MgBr 2 magnesium bromide
  • the ammonia storage material 18 may contain an additive such as a carbon fiber that improves thermal conductivity. The particles of the ammonia storage material 18 will be described in detail later.
  • a filter 19 for preventing the ammonia storage material 18 from escaping from the ammonia introduction pipe 13 and the ammonia discharge pipe 14 to the outside of the container 17 is attached to the upper portion of the container 17.
  • a heater 29 for heating the ammonia storage material 18 accommodated in the container 17 is disposed around the side wall portion 17 a of the container 17.
  • NH 3 is released from the ammonia storage material 18.
  • the released NH 3 is supplied to the ammonia injector 12 through the ammonia outlet pipe 14. Then, NH 3 is injected into the exhaust gas by the ammonia injector 12, and NOx is reduced by NH 3 in the SCR 6.
  • a porous member (not shown) for spreading NH 3 as a whole may be arranged.
  • a porous member for example, a sheet-like metal fiber (stainless steel fiber or the like) is used.
  • a partition wall extending from the base portion 17 b toward the lid portion 17 c may be disposed in the container 17.
  • the ammonia storage material 18 is filled so that a free space J exists in the container 17 as shown in FIG.
  • the total amount of ammonia storage material 18 is filled into the container 17 before storage of NH 3 to the ammonia storage material 18, the bulk density at the time of full storage on the NH 3 ammonia absorber 18 NH 3 Is an amount that is smaller than the true density when fully occluded in the ammonia occlusion material 18. That is, the following formula is obtained.
  • NH 3 When NH 3 is introduced into the container 17 by connecting the ammonia introduction pipe 13 to the ammonia supply source 11, NH 3 is occluded in the ammonia occlusion material 18, and as shown in FIG. The occlusion material 18 expands in volume. At this time, there is almost no free space J in the container 17, the ammonia storage material 18 is pressed against the inner wall surface of the container 17, and a surface pressure acts on the container 17. Note that NH 3 may be introduced into the container 17 by connecting the ammonia introduction pipe 13 to the ammonia supply source 11 with the container 17 removed from the exhaust purification system 1.
  • FIG. 3 is an image diagram showing a state of change of the ammonia storage material 18 when the ammonia storage material 18 undergoes volume expansion.
  • FIG. 4 is a graph showing an example of the relationship between the elapsed time from the start of occlusion of NH 3 in the ammonia occlusion material and the surface pressure acting on the container 17.
  • FIG. 3A shows the state of the ammonia storage material 18 before storing NH 3 .
  • the reduced particle 18a When the particle 18a is collapsed and reduced in diameter, as shown in FIG. 3D, the reduced particle 18a enters the gap K between the particles 18a. Thus, it weakens the pressing force of the container 17 by the particles 18a, the surface pressure acting on the container 17 is low (see time T 3 in FIG. 4). Then, as shown in FIG. 3E, when the particle 18a is sufficiently reduced in diameter and the gap K between the particles 18a is filled, the container 17 is prevented from being pressed by the particle 18a. surface pressure almost ceases to act on (see the time T 4 in FIG. 4).
  • the ammonia storage material 18 When the ammonia storage material 18 expands in volume, the ammonia storage material 18 changes as described above. Therefore, when the particle size of the particles 18a of the ammonia storage material 18 is reduced, other particles 18a enter the gap K between the particles 18a. It is considered that the surface pressure acting on the container 17 becomes low.
  • FIG. 5 is an image diagram showing a change in the ammonia storage material 18 when the ammonia storage material 18 undergoes volume expansion when the particle size of the particles 18a of the ammonia storage material 18 is reduced.
  • FIG. 5A shows the state of the ammonia storage material 18 before storing NH 3 .
  • the surface pressure measuring device 20 includes a container 21 having a cylindrical shape.
  • a plunger 22 and a load cell 23 for measuring a load applied to the plunger 22 are arranged inside the container 21.
  • An upper region of the load cell 23 inside the container 21 is an ammonia storage material storage portion 24 in which the ammonia storage material 18 is stored.
  • the inner diameter of the ammonia storage material container 24 is 15 mm, and the depth of the ammonia storage material container 24 is 5 mm.
  • An ammonia introduction pipe 25 for introducing NH 3 into the ammonia storage material accommodating portion 24 is fixed to the lid portion 21 a of the container 21.
  • the ammonia introduction pipe 25 is provided with an on-off valve 26 for opening and closing the NH 3 flow path.
  • a filter 27 for preventing the ammonia storage material 18 from escaping to the outside of the container 21 when the ammonia storage material 18 undergoes volume expansion is disposed at the upper portion of the container 21.
  • anhydrous MgCl 2 was used as the ammonia storage material 18.
  • 0.969 g of Mg (NH 3 ) 6 Cl 2 is generated.
  • the bulk density of Mg (NH 3 ) 6 Cl 2 is 1.1 g / cm 3 .
  • the true density of Mg (NH 3 ) 6 Cl 2 is about 1.25 g / cm 3 . That is, the bulk density under the experimental conditions corresponds to about 0.9 times the true density.
  • the reason why the bulk density has a margin of about 10% with respect to the true density is to suppress the fluctuation of the bulk density due to the influence of disturbance.
  • the result of measuring the surface pressure using the surface pressure measuring device 20 is shown in FIG.
  • the horizontal axis represents the elapsed time from the start of storing NH 3 in the ammonia storage material 18, and the vertical axis represents the surface pressure acting on the container 21.
  • the thick solid line Pa is a measurement result when the particle size of the particles 18a of the ammonia storage material 18 is 40 ⁇ m or less.
  • a thin solid line Qa is a measurement result when the particle size of the particles 18a of the ammonia storage material 18 is larger than 40 ⁇ m and 75 ⁇ m or less.
  • a broken line Ra is a measurement result when the particle size of the particles 18a of the ammonia storage material 18 is larger than 75 ⁇ m and 106 ⁇ m or less.
  • a dotted line Sa is a measurement result when the particle size of the particles 18a of the ammonia storage material 18 is larger than 106 ⁇ m and 150 ⁇ m or less.
  • a one-dot chain line Ta is a measurement result when the particle size of the particles 18a of the ammonia storage material 18 is larger than 150 ⁇ m and equal to or smaller than 210 ⁇ m.
  • the particle diameter of the particles 18a of the ammonia storage material 18 is represented by a value classified by sieving using five types of meshes having different mesh opening sizes. As shown in FIG. 8, the mesh 30 used has a square mesh. As the mesh 30, five kinds of mesh opening sizes M of 40 ⁇ m, 75 ⁇ m, 106 ⁇ m, 150 ⁇ m, and 210 ⁇ m are prepared. By passing the particles 18a through these meshes 30, the particle size of the particles 18a is classified.
  • FIG. 9 is a graph showing the relationship between the maximum particle diameter of the particles 18 a of the ammonia storage material 18 and the maximum surface pressure acting on the container 17.
  • the horizontal axis represents the maximum particle diameter D of the particles 18 a of the ammonia storage material 18, and the vertical axis represents the maximum surface pressure P acting on the container 17.
  • the maximum surface pressure P acting on the container 17 is obtained from the graph shown in FIG.
  • the maximum particle diameter D of the particles 18a is determined by the mesh through which the particles 18a pass among the above five types of meshes. Specifically, the maximum particle diameter D of the particle 18a is the mesh size of a mesh having the smallest mesh size among meshes through which the particle 18a passes. For example, when the particle 18a passes through all five types of meshes, the maximum particle diameter D of the particle 18a is 40 ⁇ m. When the particle 18a passes through a mesh having an opening size of 75 ⁇ m, 106 ⁇ m, 150 ⁇ m, and 210 ⁇ m among the five types of meshes, the maximum particle diameter D of the particle 18a is 75 ⁇ m.
  • the maximum particle diameter D of the particle 18a is 106 ⁇ m.
  • the maximum particle diameter D of the particle 18a is 150 ⁇ m.
  • the maximum particle diameter D of the particle 18a is 210 ⁇ m.
  • the maximum surface pressure P acting on the container 17 is 3 MPa or less.
  • the maximum particle diameter D of the particles 18a may be set to 102 ⁇ m or less.
  • the maximum surface pressure P acting on the container 17 is more preferably 1 MPa or less, and for this purpose, the maximum particle diameter D of the particles 18a may be 58 ⁇ m or less.
  • the maximum surface pressure P acting on the container 17 is more preferably 0.5 MPa or less, and for this purpose, the maximum particle diameter D of the particles 18a may be 40 ⁇ m or less.
  • a resin such as polytetrafluoroethylene (PTFE) that is lighter than stainless steel can be used as the material of the container 17.
  • the thickness T (mm) of the container 17 only needs to satisfy the relationship of the following formula.
  • ⁇ is the safety factor of the container 17
  • ⁇ is the allowable stress (MPa) of the material of the container 17
  • L is the distance (mm) between the opposing inner wall surfaces of the side wall portion 17 a of the container 17.
  • L is the inner diameter of the side wall portion 17a.
  • L is the distance between the inner side surfaces which oppose the long side direction of the side wall part 17a.
  • the container 17 When the container 17 is mounted on a vehicle as in this embodiment, it is desirable to set the safety factor ⁇ of the container 17 to 1.2 or more.
  • the maximum surface pressure P acting on the container 17 can be suppressed to 3 MPa or less, so that the safety factor ⁇ of the container 17 is ensured to be 1.2 or more.
  • the thickness T of the container 17 may satisfy the following formula. T ⁇ 1.8 ⁇ L / ⁇ (6)
  • the maximum surface pressure P acting on the container 17 can be suppressed to 1 MPa or less, so that the safety factor ⁇ of the container 17 is ensured to be 1.2 or more.
  • the thickness T of the container 17 may satisfy the following formula. T ⁇ 0.6 ⁇ L / ⁇ (7)
  • the maximum surface pressure P acting on the container 17 can be suppressed to 0.5 MPa or less, and therefore the safety factor ⁇ of the container 17 is secured to 1.2 or more.
  • thickness T of such a container 17 the following formula may be satisfied. T ⁇ 0.3 ⁇ L / ⁇ (8)
  • the measurement result at that time is shown in FIG.
  • the graph shown in FIG. 10 corresponds to the graph shown in FIG.
  • the maximum surface pressure P acting on the container 17 was about 12 MPa (see circle X).
  • the maximum surface pressure P acting on the container 17 is about 10 MPa (see rhombus Y) and about 5 MPa (square mark), respectively. Z). That is, the maximum surface pressure P acting on the container 17 when using SrCl 2 and MgBr 2 is lower than the maximum surface pressure P acting on the container 17 when using MgCl 2 .
  • the maximum particle diameter of the particles 18a of the ammonia storage material 18 is D ( ⁇ m) and the allowable surface pressure of the container 17 is Pal (MPa)
  • the container 17 can be reduced in size and weight. Further, the bulk density when NH 3 is fully occluded in the ammonia occlusion material 18 can be increased by the amount by which the surface pressure acting on the container 17 becomes lower. In this case, since the inner volume of the container 17 can be reduced, the container 17 can be reduced in size and weight.
  • the maximum particle diameter D of the particles 18a of the ammonia storage material 18 is set to 102 ⁇ m or less, the maximum surface pressure P acting on the container 17 during the volume expansion of the ammonia storage material 18 can be suppressed to 3 MPa or less.
  • the ammonia storage material 18 contains any of MgCl 2 , SrCl 2 and MgBr 2 , when the maximum particle diameter D of the particles 18a of the ammonia storage material 18 is 58.4 ⁇ Pal 0.51 or less, the container The surface pressure acting on 17 can be reliably reduced.
  • the thickness of the container 17 is T (mm)
  • the safety factor of the container 17 is ⁇
  • the allowable stress of the material of the container 17 is ⁇ (MPa)
  • the inner side of the side wall portion 17a of the container 17 is opposed.
  • L (mm) is the distance between the wall surfaces
  • D ( ⁇ m) is the maximum particle size of the particles 18a of the ammonia storage material 18. Since / 2 / ⁇ is satisfied, the lower limit value of the thickness T of the container 17 is reduced by reducing the maximum particle diameter D of the particles 18a of the ammonia storage material 18.
  • the present invention is not limited to the above embodiment.
  • the powdery ammonia storage material 18 is accommodated in the container 17, but is not particularly limited thereto, and the powdery ammonia storage material 18 is compression-molded and pelletized.
  • the ammonia storage material 18 may be accommodated in the container 17.
  • ammonia absorption / release device of the present invention may be applied to a reaction part of a chemical heat storage device.
  • An example in which the ammonia absorption / release device is applied to the reaction section of a chemical heat storage device is shown in FIG.
  • FIG. 11 is a schematic configuration diagram showing a modification of the exhaust purification system 1 shown in FIG.
  • the exhaust purification system 1 includes a chemical heat storage device 40.
  • Chemical heat storage device 40 includes a reaction section with the heat exchanger 3 disposed between the engine 2 and the DOC4 in the exhaust passage 8, the holding and NH 3 by physical adsorption of NH 3 desorption of activated carbon can be the adsorber 42 having an adsorbent 41, a reaction part with the heat exchanger 3 with connecting the adsorber 42, the NH 3 supply pipe 43 is NH 3 flows, is disposed in the NH 3 supply pipe 43, And a valve 44 for opening and closing the NH 3 flow path.
  • the heat exchanger 3 with a reaction unit surrounds a laminate 47 in which a plurality of heat exchange units 45 and a plurality of reaction units 46 are alternately laminated, and surrounds the laminate 47. It has a cylindrical pipe 48 arranged. A circular lid member (not shown) is fixed to both ends of the pipe 48 so as to expose the heat exchange units 45 and cover the reaction units 46.
  • the heat exchanging unit 45 forms a flow path through which the exhaust gas flows, and performs heat exchange between the exhaust gas and the reaction unit 46.
  • the heat exchanging part 45 includes a tube 49 having a rectangular cross section and a wave-like fin 50 disposed in the tube 49.
  • the tube 49 is opened on the upstream side and the downstream side.
  • the reaction unit 46 includes ammonia storage material 51 that emits NH 3 by exhaust heat of exhaust gas while occluding and NH 3. In a state where the ammonia storage material 51 does not store NH 3 , a free space is formed in the reaction unit 46.
  • the ammonia storage material 51 is configured by pelletizing the atomized material.
  • a heat insulating material 52 is disposed between the ammonia storage material 51 and the pipe 48.
  • the pipe 48, the tube 49, the heat insulating material 52, and the lid member constitute a container that accommodates the ammonia storage material 51.
  • the thickness of the tube 49 and the lid member (not shown) constituting a part of the container for storing the ammonia storage material 51 is used.
  • the size of the component can be reduced and the weight can be reduced.
  • ammonia absorption / release apparatus 10 is arrange
  • the ammonia absorption / release apparatus of this invention may be arrange
  • the ammonia adsorption / desorption device is applied to the reaction unit of the chemical heat storage device that heats the exhaust gas, but the present invention is a reaction unit of the chemical heat storage device that heats a heating target other than the exhaust system of the engine. It is also applicable to.
  • Such heating object may be various heat media such as engine oil, transmission oil, cooling water, or air.
  • the reaction part of the chemical heat storage device may be disposed on the outer peripheral part (a part of the outer peripheral part or the entire outer periphery of the outer peripheral part) of the heat medium flow path through which the heat medium flows to heat the heat medium flow path itself. .
  • a heat exchanger may be disposed in the heat medium flow path through which the heat medium flows, and the heat medium may be heated through the heat exchanger in the reaction unit.
  • a heat exchange unit integrated heater is configured in which a plurality of reaction units including heat storage materials and heat exchange units such as heat exchange fins are alternately stacked, and the heat exchanger integrated heater is heated. You may arrange
  • the present invention can also be applied to a chemical heat storage device arranged other than the engine.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
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  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
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Abstract

L'invention concerne un appareil d'absorption/de désorption d'ammoniac 10 équipé : d'un matériau d'absorption d'ammoniac 18 qui peut absorber et désorber de l'ammoniac lors de l'application de chaleur ; et d'un récipient 17 dans lequel est logé le matériau d'absorption d'ammoniac 18. Dans l'appareil d'absorption/de désorption d'ammoniac 10, l'exigence représentée par la formule : D ≤ 58,4 × Pal0,51 est satisfaite, D (μm) représentant le plus grand diamètre de particule de particules de la matière d'absorption d'ammoniac 18 et Pal (MPa) représentant une pression de contact que le récipient 17 peut tolérer.
PCT/JP2015/078097 2014-11-19 2015-10-02 Appareil d'absorption/de désorption d'ammoniac WO2016080090A1 (fr)

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JP2014234640A JP2018009582A (ja) 2014-11-19 2014-11-19 アンモニア吸放出装置
JP2014-234640 2014-11-19

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002154801A (ja) * 2000-11-15 2002-05-28 Japan Steel Works Ltd:The 水素貯蔵容器用通気材
JP2013072558A (ja) * 2011-09-26 2013-04-22 Toyota Central R&D Labs Inc 熱回収式加熱装置
JP2014015360A (ja) * 2012-07-10 2014-01-30 Toyota Industries Corp アンモニア貯蔵タンク

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002154801A (ja) * 2000-11-15 2002-05-28 Japan Steel Works Ltd:The 水素貯蔵容器用通気材
JP2013072558A (ja) * 2011-09-26 2013-04-22 Toyota Central R&D Labs Inc 熱回収式加熱装置
JP2014015360A (ja) * 2012-07-10 2014-01-30 Toyota Industries Corp アンモニア貯蔵タンク

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