US20220042677A1 - Method for applying a catalyst to a surface of the catalytic combustion burner - Google Patents

Method for applying a catalyst to a surface of the catalytic combustion burner Download PDF

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Publication number
US20220042677A1
US20220042677A1 US17/416,215 US201917416215A US2022042677A1 US 20220042677 A1 US20220042677 A1 US 20220042677A1 US 201917416215 A US201917416215 A US 201917416215A US 2022042677 A1 US2022042677 A1 US 2022042677A1
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United States
Prior art keywords
burner
catalyst
catalytic combustion
catalytic
end piece
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Pending
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US17/416,215
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English (en)
Inventor
Corinne GERARD
Laurent Ozouf
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Produits Berger SAS
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Produits Berger SAS
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Assigned to PRODUITS BERGER reassignment PRODUITS BERGER ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GERARD, CORINNE, OZOUF, LAURENT
Publication of US20220042677A1 publication Critical patent/US20220042677A1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D3/00—Burners using capillary action
    • F23D3/02—Wick burners
    • F23D3/18—Details of wick burners
    • F23D3/24—Carriers for wicks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2213/00—Burner manufacture specifications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/03081—Catalytic wick burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/31004—Wick burners using alcohol as a fuel

Definitions

  • the present invention pertains generally to the field of catalytic combustion, and more particularly to that of catalytic combustion burners made of porous material. These burners are especially used for diffusing fragrance and/or active substances, for destroying odorous or non-odorous molecules, and/or for purifying air.
  • a burner of this kind has for example been described in French patent application FR3061543 in the name of the Applicant. This is more particularly a burner intended to receive a wick immersed in a combustible liquid contained in a catalytic combustion bottle, which receives the burner at its neck.
  • a burner of this kind (represented in particular in FIG. 3A ) is made of a porous material, which comprises an end piece having on its upper part a cavity emerging to the exterior and on its lower part a cavity in which the end of the wick is engaged. The end piece is extended in its lower part by a sleeve. The outer face of the upper part of the end piece, and its upper face (which is annular), are doped with a catalyst.
  • the combustible liquid conveyed by the wick penetrates into the pores of the porous material of the burner. Part of this liquid crosses the central zone of the burner, where it undergoes vaporization.
  • a burner of this kind has the disadvantage, when doped, of leading in operation to an increase in the temperature at the central diffusion zone of the burner, this being detrimental to the olfactory quality when the burner is used for diffusing fragrance.
  • the Applicant has developed a method for applying the catalyst that allows better distribution of catalyst on the surface of the end piece of the burner, and thus prevents too high a temperature at the central zone.
  • the present invention is directed to a process for applying a catalyst to the surface of a catalytic combustion burner, said catalytic combustion burner being composed of a porous material and comprising: an end piece with an upper part and a lower part, said upper part having a peripheral side wall comprising an inner face delimiting a cavity, an essentially cylindrical outer face, and a crown-shaped upper face, and a sleeve disposed in the extension of said lower part of said end piece, and comprising a cavity adapted to grip a wick intended to convey a combustible composition to the burner, said method comprising: A) a step of impregnating said outer face and, either, said inner face, said crown of the end piece, or said inner face and said crown, with a catalytic composition comprising at least one catalyst belonging to groups 9 or 10 of the Periodic Table of the Elements; B) a step of heat-treating said burner thus impregnated with the catalyst to a temperature T a of at least 450° C.,
  • a newtonian fluid is understood in the sense of the present invention to be a fluid whose viscosity is dependent neither on its shear rate nor on the time for which the liquid is sheared.
  • the catalytic composition may comprise: between 1% and 5% by weight, relative to the total weight of the catalytic composition, of a catalyst selected from metals belonging to groups 9 or 10 of the Periodic Table of the Elements, and between 0.2% and 2% by weight, relative to the total weight of the catalytic composition, of a compound capable of increasing the flow resistance of said catalytic composition.
  • a compound capable of increasing the flow resistance of a fluid is understood in the sense of the present invention to be a compound capable of endowing said fluid with a dynamic viscosity pc of at least 5 mPa ⁇ s at ambient temperature (i.e. of the order of 20° C.).
  • Said compound capable of increasing the flow resistance may preferably be a polymer derived from glucose or a polymer derived from ethylene oxide.
  • the heat-treatment step B) advantageously comprises the temperature being maintained at T a for at least 3 hours.
  • the present invention is likewise directed to a catalytic combustion burner which can be coated with a catalyst in accordance with the method of the invention.
  • the present invention is also directed to a catalytic combustion bottle adapted to contain a combustible liquid and to receive at its neck a catalytic combustion burner which receives a wick immersed in said liquid, said bottle (20) being equipped with a burner of the invention.
  • FIG. 1 represents schematically a photograph of an example of a catalytic combustion burner with catalyst, which may have been treated with the method of the invention by impregnation of a catalyst on its surface;
  • FIG. 2 is a schematic view in elevation of a bottle equipped with the catalytic combustion burner of FIG. 1 ;
  • FIG. 3A is an IR thermogram made in order to show the impact of application of the catalyst on the surface of the end piece of a catalytic combustion burner treated by conventional application, in the absence of air conditioning;
  • FIG. 3 Bis an IR thermogram made in order to show the impact of application of the catalyst on the surface of the end piece of a catalytic combustion burner treated by the method of the invention, in the absence of air conditioning;
  • FIG. 4A is an IR thermogram made in order to show the impact of application of the catalyst on the surface of the end piece of a catalytic combustion burner treated by conventional application, in the presence of air conditioning;
  • FIG. 4B is an IR thermogram made in order to show the impact of application of the catalyst on the surface of the end piece of a catalytic combustion burner treated by the method of the invention, in the presence of air conditioning;
  • FIG. 5 illustrates the protocol for measurement by infrared camera of the impact of air conditioning on the temperature of the burner in operation.
  • FIG. 1 The technical features common to [ FIG. 1 ] and [ FIG. 2 ] are each denoted by the same numerical reference in the figures in question.
  • FIG. 3A , FIG. 3B , FIG. 4A , FIG. 4B and FIG. 5 are discussed in the descriptive part of the examples, which follows the description of FIG. 1 and FIG. 2 .
  • FIG. 1 shows schematically a transverse section through an example of a catalytic combustion burner with catalyst, which can be treated by the method of the invention by impregnation of a catalyst on its surface.
  • a burner 1 of this kind is made of a porous material, which comprises an end piece 1 having on its upper part 10 a cavity (or reservoir) 100 emerging to the exterior, and on its lower part 11 a cavity in which the end of a wick 40 is engaged, this wick 40 being intended to convey to the burner a combustible composition 30 (in the examples below, isopropyl alcohol) from the bottle 20 , at whose neck 5 the burner 1 is installed.
  • the end piece 1 is extended in its lower part by a sleeve 2 (also called barrel).
  • FIG. 1 shows schematically a transverse section through an example of a catalytic combustion burner with catalyst, which can be treated by the method of the invention by impregnation of a catalyst on its surface.
  • a burner 1 of this kind is made of a por
  • the combustible liquid 30 is customarily an alcohol, isopropyl alcohol for example, or any other appropriate combustible liquid which is compatible with the legislation in force in this field.
  • the combustible liquid 30 must more particularly be such that its vaporization and its catalytic combustion do not release any unpleasant odour.
  • the combustible liquid 30 may further comprise a fragranced substance and/or an active material.
  • the wick 40 is any known wick, for example a wick made of cotton, or a wick made of mineral material, for example of mineral fibres.
  • the combustible liquid 30 from the bottle 20 rises in the wick 40 by capillarity and penetrates into the pores of the porous material of the burner, which, when it has been preheated, carries out catalytic combustion of said liquid.
  • the upper part 10 of the end piece 1 has a peripheral side wall comprising an inner, essentially truncated face which delimits a cavity in the form of a reservoir 100 , an essentially cylindrical outer face 101 , and a crown-shaped upper face 102 .
  • a catalyst (which cannot be seen in FIG. 1 and FIG. 2 ) has been applied on the outer face 101 and the crown 102 of the end piece 1 , either in accordance with the method of the invention (denoted in the examples which follow by “burner BI”), or in accordance with a method which is known to a person skilled in the art (denoted in the examples which follow by “burner BC”). In this latter case, the burner whose doping has been performed conventionally is used as a control in the tests of catalytic operation without and without air conditioning.
  • this burner was disposed in the catalytic combustion bottle 20 shown in FIG. 2 .
  • the burner 10 (either that of the invention as shown in FIG. 5 , or that of the prior art as shown in FIG. 1 , is installed in the neck 50 of the bottle (by means, for example, of a metallic seat placed in the neck 50 ).
  • the wick 40 is received inside the burner 10 , this catalytic combustion wick 40 receiving a wick ( 40 ) immersed in the liquid 30 .
  • the bottle 20 may be a bottle of any shape that has a neck 50 into which the burner 10 is fitted.
  • Aqueous, alcoholic or aqueous-alcoholic solvent Aqueous, alcoholic or aqueous-alcoholic solvent
  • the catalyst used (whether on parts 100 , 101 or 102 of the burner) is a metal belonging to groups 9 or 10 of the Periodic Table of the Elements. It is present at the rate of 2% by weight based on the weight of the catalytic composition of the invention.
  • the catalyst used (whether on parts 100 , 101 or 102 of the burner) is a metal belonging to groups 9 or 10 of the Periodic Table of the Elements. It is present at the rate of 2% by weight, relative to the weight of the control catalytic composition.
  • Burner “BC” (shown in FIG. 1 ) composed of a porous material obtained from composition C, with burner faces 100 , 101 and 102 being doped with the control catalytic composition, which impregnates them.
  • the catalytic composition is applied on faces 100 , 101 and 102 of the end piece of the burner by impregnation and then baking to a temperature of at least 450° C., this temperature being subsequently maintained for at least 3 hours.
  • Burner “B” (shown in FIG. 1 ) composed of a porous material obtained from composition C, with burner faces 100 , 101 and 102 being doped with the catalytic composition of the invention, which impregnates them.
  • the catalytic composition is applied on faces 100 , 101 and 102 of the end piece of the burner by impregnation and then baking to a temperature of at least 450° C., this temperature being subsequently maintained for at least 3 hours.
  • the test protocol is shown in FIG. 5 . It consists overall of using infrared thermography (IR), with the aid of an IR thermal camera, to measure the temperature on each of the burners tested (BI and BC) in operation on the bottle 20 , which is placed at a reasonable distance from an air conditioner (the power of which is 800 W in the context of the tests carried out), at the low level of FIG. 4A and FIG. 4B . These measurements, moreover, are compared, for each burner tested (control 1 C and inventive 1 and 2 ), with measurements carried out without ventilation.
  • IR infrared thermography
  • Burner BI treated by the method of the invention :
  • thermograms of FIG. 3A and FIG. 3B in the absence of air conditioning, shows that the temperature of the diffusion centre zone of the burner decreases from 389° C. (treatment with the control catalytic composition) to 364° C. when the faces 100 , 101 and 102 of the end piece of the catalyst are treated by the method of the invention.
  • thermograms of FIG. 3A and FIG. 3B shows a similar effect in the presence of air conditioning: the temperature of the central diffusion zone zone of the burner decreases from 357° C. (treatment with the control catalytic composition) to 318° C. when the faces 100 , 101 and 102 of the end piece of the catalyst are treated by the method of the invention.
  • the catalyst penetrates less substantially into the inside of the burner, and so the temperature of the central diffusion zone of the burner is lower than if the control catalytic composition had been applied.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Catalysts (AREA)
  • Gas Burners (AREA)
  • Spray-Type Burners (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
US17/416,215 2018-12-21 2019-12-19 Method for applying a catalyst to a surface of the catalytic combustion burner Pending US20220042677A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1873930 2018-12-21
FR1873930A FR3090420B1 (fr) 2018-12-21 2018-12-21 Procede de depot d’un catalyseur a la surface d’un bruleur a combustion catalytique
PCT/EP2019/086486 WO2020127848A1 (fr) 2018-12-21 2019-12-19 Procede de depot d'un catalyseur a la surface d'un bruleur a combustion catalytique

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US17/416,215 Pending US20220042677A1 (en) 2018-12-21 2019-12-19 Method for applying a catalyst to a surface of the catalytic combustion burner

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US (1) US20220042677A1 (ko)
EP (1) EP3899368B1 (ko)
JP (1) JP7483714B2 (ko)
KR (1) KR102658559B1 (ko)
CN (1) CN113195975B (ko)
CA (1) CA3121598A1 (ko)
ES (1) ES2971889T3 (ko)
FR (1) FR3090420B1 (ko)
TW (1) TWI731522B (ko)
WO (1) WO2020127848A1 (ko)

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1451411A (en) * 1973-01-25 1976-10-06 Philagro Sa Device for the continuous diffusion of volatile materials
US6303538B1 (en) * 1998-06-03 2001-10-16 Saes Getters S.P.A. Process for producing metallic fiber boards functionalized by catalysts and boards so produced
US20020019435A1 (en) * 2000-07-06 2002-02-14 Jannick Lehoux Method of diffusing an acaricidal composition comprising permethrin and tetramethrin, and the use of a catalytic combustion flask for implementing such a method
US20040265762A1 (en) * 2003-06-27 2004-12-30 Jannick Lehoux Catalytic combustion burner system and flask fitted with such a system
US20050037309A1 (en) * 2003-06-27 2005-02-17 Jannick Lehoux Catalytic combustion burner made from a porous material and flask equipped with such a burner
US20070134607A1 (en) * 2005-12-09 2007-06-14 Kuo-Tung Chen Structure for forming a burning wick and burning device with a burning wick
US20070202450A1 (en) * 2006-02-08 2007-08-30 The Board Of Regents, The University Of Texas System Catalytic burner for combustion of liquid fuels
US20080014539A1 (en) * 2006-02-08 2008-01-17 The Board Of Regents, The University Of Texas System Low vapor pressure fuels for use in catalytic burners
US20090031855A1 (en) * 2007-08-03 2009-02-05 Ramberg Charles E Porous bodies and methods
US20100304958A1 (en) * 2006-10-16 2010-12-02 Yun Guo Method for preparing monolithic catalyst washcoat
US20110097259A1 (en) * 2008-05-13 2011-04-28 L'air Liquide Societe Anonyme Pour L'exploitation Ceramic Foam with Gradient of Porosity in Heterogeneous Catalysis
US20120128934A1 (en) * 2009-07-30 2012-05-24 Snecma Part comprising a substrate carrying a ceramic coating layer
US20120245024A1 (en) * 2011-03-25 2012-09-27 3Dceram Method for manufacturing a catalyst support
US20140272744A1 (en) * 2013-03-14 2014-09-18 Mei & Kuang Technical Company Limited Stone Burner for a Fragrance Lamp
US20160074809A1 (en) * 2014-09-15 2016-03-17 Paccar Inc Urea hydrolysis reactor for selective catalytic reduction
US20180043334A1 (en) * 2015-03-05 2018-02-15 Shell Oil Company Methane oxidation catalyst, process to prepare the same and method of using the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
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US4008037A (en) * 1973-12-10 1977-02-15 Engelhard Minerals & Chemicals Corporation Compositions and methods for high temperature stable catalysts
FR2610390B1 (fr) * 1987-01-29 1990-09-07 Berger Sa Produits Bruleur a combustion catalytique
JP2892027B2 (ja) * 1989-02-09 1999-05-17 バブコツク日立株式会社 触媒燃焼装置の製造法
FR2779509B1 (fr) 1998-06-04 2000-07-07 Prod Berger Bruleur a combustion catalytique en matiere poreuse et flacon equipe d'un tel bruleur
FR2818151B1 (fr) 2000-12-14 2004-04-02 Prod Berger Composition anti-bacterienne destinee a etre diffusee pour lutter contre les bacteries contenues dans l'air, procede de diffusion d'une telle composition
US8513153B2 (en) * 2009-04-22 2013-08-20 Uto Environmental Products Limited Fuel additive
GB201321309D0 (en) * 2013-12-03 2014-01-15 Ashleigh & Burwood A Catalytic fragrance burner assembly and a method of manufacture thereof
FR3061543B1 (fr) 2016-12-30 2019-08-23 Produits Berger Bruleur a combustion catalytique en materiau poreux a performances de fonctionnement optimisees et flacon equipe d'un tel bruleur

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1451411A (en) * 1973-01-25 1976-10-06 Philagro Sa Device for the continuous diffusion of volatile materials
US6303538B1 (en) * 1998-06-03 2001-10-16 Saes Getters S.P.A. Process for producing metallic fiber boards functionalized by catalysts and boards so produced
US20020019435A1 (en) * 2000-07-06 2002-02-14 Jannick Lehoux Method of diffusing an acaricidal composition comprising permethrin and tetramethrin, and the use of a catalytic combustion flask for implementing such a method
US20040265762A1 (en) * 2003-06-27 2004-12-30 Jannick Lehoux Catalytic combustion burner system and flask fitted with such a system
US20050037309A1 (en) * 2003-06-27 2005-02-17 Jannick Lehoux Catalytic combustion burner made from a porous material and flask equipped with such a burner
US20070134607A1 (en) * 2005-12-09 2007-06-14 Kuo-Tung Chen Structure for forming a burning wick and burning device with a burning wick
US20070202450A1 (en) * 2006-02-08 2007-08-30 The Board Of Regents, The University Of Texas System Catalytic burner for combustion of liquid fuels
US20080014539A1 (en) * 2006-02-08 2008-01-17 The Board Of Regents, The University Of Texas System Low vapor pressure fuels for use in catalytic burners
US20100304958A1 (en) * 2006-10-16 2010-12-02 Yun Guo Method for preparing monolithic catalyst washcoat
US20090031855A1 (en) * 2007-08-03 2009-02-05 Ramberg Charles E Porous bodies and methods
US20110097259A1 (en) * 2008-05-13 2011-04-28 L'air Liquide Societe Anonyme Pour L'exploitation Ceramic Foam with Gradient of Porosity in Heterogeneous Catalysis
US20120128934A1 (en) * 2009-07-30 2012-05-24 Snecma Part comprising a substrate carrying a ceramic coating layer
US20120245024A1 (en) * 2011-03-25 2012-09-27 3Dceram Method for manufacturing a catalyst support
US20140272744A1 (en) * 2013-03-14 2014-09-18 Mei & Kuang Technical Company Limited Stone Burner for a Fragrance Lamp
US20160074809A1 (en) * 2014-09-15 2016-03-17 Paccar Inc Urea hydrolysis reactor for selective catalytic reduction
US20180043334A1 (en) * 2015-03-05 2018-02-15 Shell Oil Company Methane oxidation catalyst, process to prepare the same and method of using the same

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Publication number Publication date
TWI731522B (zh) 2021-06-21
KR20210102909A (ko) 2021-08-20
EP3899368C0 (fr) 2024-02-07
EP3899368A1 (fr) 2021-10-27
CN113195975B (zh) 2023-09-19
FR3090420B1 (fr) 2020-12-11
EP3899368B1 (fr) 2024-02-07
JP7483714B2 (ja) 2024-05-15
ES2971889T3 (es) 2024-06-10
CA3121598A1 (fr) 2020-06-25
TW202030021A (zh) 2020-08-16
CN113195975A (zh) 2021-07-30
FR3090420A1 (fr) 2020-06-26
KR102658559B1 (ko) 2024-04-19
WO2020127848A1 (fr) 2020-06-25
JP2022513281A (ja) 2022-02-07

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