GB1398707A - Reducing nitrogen oxide formation during combustion - Google Patents

Reducing nitrogen oxide formation during combustion

Info

Publication number
GB1398707A
GB1398707A GB3670870A GB3670870A GB1398707A GB 1398707 A GB1398707 A GB 1398707A GB 3670870 A GB3670870 A GB 3670870A GB 3670870 A GB3670870 A GB 3670870A GB 1398707 A GB1398707 A GB 1398707A
Authority
GB
United Kingdom
Prior art keywords
flame
oxides
grid
cone
burner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3670870A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Exxon Research and Engineering Co filed Critical Exxon Research and Engineering Co
Priority to GB3670870A priority Critical patent/GB1398707A/en
Publication of GB1398707A publication Critical patent/GB1398707A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/40—Continuous combustion chambers using liquid or gaseous fuel characterised by the use of catalytic means

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)

Abstract

1398707 Gas turbine engine combustion chambers EXXON RESEARCH & ENG CO 6 April 1972 [29 Jan 1971 28 July 1971] 36708/70 and 10250/72 Heading F1L [Also in Divisions B1 and F4] A method for reducing the amount of nitrogen oxides formed in a burner flame comprises the introduction of a substrate, formed of at least one metal and/or at least one metal oxide which is substantially solid and substantially involatile at flame temperatures, into the flame in the secondary reaction zone where the rate of formation of nitric oxide increases downstream or alternatively at a point downstream of the primary reaction zone which is also at or near the hottest part of the flame or (as a further alternative) at a distance from the base of the flame lying in the range of from 10 per cent to 60 per cent of the total flame length, the substrate being so formed that the flame extends on both sides thereof. In one embodiment of the invention a grid formed of a parallelogrammatic array of mild steel wires coated with a silica-alumina refractory cement is inserted in the flame of a kerosene-burning downwardly-firing oil burner, the grid being impregnated with solutions of chromic nitrate and ferric nitrate which are fired to provide a catalytically active mixture of chromium and iron oxides. Other metals which may be used as catalysts in the substrate include Al, Ba, Ca, Co, Cu, K, Mn, Mo, Na, Nd, Ni, Pb, Pt, Sr, V, W, and Zr. These catalysts in the form of the metals themselves or oxides thereof are preferably incorporated with a heat-resisting base material of ceramic, vitreous or refractory nature which preferably includes at least one of the following elements:- chromium, magnesium, zirconium, tungsten, molybdenum, iron, nickel, cobalt, calcium - in the form of oxides, mixed oxides or carbides. Examples of such bases for the substrate include extruded filaments of asbestos with zirconia, circular quartz filaments and helical or spiral meshes, grids or networks of filaments. When an oil-burner is used which produces a cone of partly-uncombusted fuel, the gaps in the grid or network through which the cone passes are made larger than those surrounding the periphery of the cone. The invention is applicable to combustion chambers of gas turbine engines.
GB3670870A 1971-01-29 1971-01-29 Reducing nitrogen oxide formation during combustion Expired GB1398707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3670870A GB1398707A (en) 1971-01-29 1971-01-29 Reducing nitrogen oxide formation during combustion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3670870A GB1398707A (en) 1971-01-29 1971-01-29 Reducing nitrogen oxide formation during combustion
GB1025072 1971-07-28

Publications (1)

Publication Number Publication Date
GB1398707A true GB1398707A (en) 1975-06-25

Family

ID=26247391

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3670870A Expired GB1398707A (en) 1971-01-29 1971-01-29 Reducing nitrogen oxide formation during combustion

Country Status (1)

Country Link
GB (1) GB1398707A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009523A1 (en) * 1978-10-02 1980-04-16 Exxon Research And Engineering Company A method of at least partially burning a hydrocarbon and/or carbonaceous fuel
DE4041360C1 (en) * 1990-12-20 1992-07-09 Wolf Klimatechnik Gmbh, 8302 Mainburg, De Atmos. burner with elongated tube in combustion chamber - has burner tube with slotted, or perforated strip of width of 15-30 % of tube dia.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009523A1 (en) * 1978-10-02 1980-04-16 Exxon Research And Engineering Company A method of at least partially burning a hydrocarbon and/or carbonaceous fuel
DE4041360C1 (en) * 1990-12-20 1992-07-09 Wolf Klimatechnik Gmbh, 8302 Mainburg, De Atmos. burner with elongated tube in combustion chamber - has burner tube with slotted, or perforated strip of width of 15-30 % of tube dia.

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee