FR2193642A1 - Removal of nitrogen oxides from waste gases - by catalysed combustion in presence of steam - Google Patents

Removal of nitrogen oxides from waste gases - by catalysed combustion in presence of steam

Info

Publication number
FR2193642A1
FR2193642A1 FR7226766A FR7226766A FR2193642A1 FR 2193642 A1 FR2193642 A1 FR 2193642A1 FR 7226766 A FR7226766 A FR 7226766A FR 7226766 A FR7226766 A FR 7226766A FR 2193642 A1 FR2193642 A1 FR 2193642A1
Authority
FR
France
Prior art keywords
pref
steam
nitrogen oxides
waste gases
catalyst
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.)
Granted
Application number
FR7226766A
Other languages
French (fr)
Other versions
FR2193642B1 (en
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.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
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 Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to FR7226766A priority Critical patent/FR2193642A1/en
Publication of FR2193642A1 publication Critical patent/FR2193642A1/en
Application granted granted Critical
Publication of FR2193642B1 publication Critical patent/FR2193642B1/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—Processes characterised by a specific catalyst

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

The nitrogen oxide content of waste gases, esp. from HNO3 mfr. is reduced by burning with a combustible gas contg. heavy hydrocarbons in the presence of a catalyst at 0.5-3.0, pref. 1.5-2.0 pts. wt. steam per pt. wt. of combustible gas, and evacuating burnt gas. The waste gas pref. contains 0.2-0.4 vol.% nitrogen oxides and 2-3 vol.% O2. The hydrocarbon pref. contains >2C and/or is aromatic. The catalyst may be one contg. Pt, Pd or Rh or one based on a metal oxide. The combustion temp. is pref. >650 degrees C. The steam reduces the formation of C particles and increases the life of the catalyst.
FR7226766A 1972-07-25 1972-07-25 Removal of nitrogen oxides from waste gases - by catalysed combustion in presence of steam Granted FR2193642A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7226766A FR2193642A1 (en) 1972-07-25 1972-07-25 Removal of nitrogen oxides from waste gases - by catalysed combustion in presence of steam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7226766A FR2193642A1 (en) 1972-07-25 1972-07-25 Removal of nitrogen oxides from waste gases - by catalysed combustion in presence of steam

Publications (2)

Publication Number Publication Date
FR2193642A1 true FR2193642A1 (en) 1974-02-22
FR2193642B1 FR2193642B1 (en) 1975-03-07

Family

ID=9102331

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7226766A Granted FR2193642A1 (en) 1972-07-25 1972-07-25 Removal of nitrogen oxides from waste gases - by catalysed combustion in presence of steam

Country Status (1)

Country Link
FR (1) FR2193642A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2314441A1 (en) * 1975-06-14 1977-01-07 Hygrotherm Eng Ltd METHOD AND APPARATUS FOR INCINERATION OF MATERIALS CONTAINING AMMONIA

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB799159A (en) * 1955-10-07 1958-08-06 Du Pont Improvements in or relating to the disposal of nocuous gases containing nitrogen oxide fumes
US2910343A (en) * 1955-12-08 1959-10-27 Du Pont Process for catalytically reducing nitrogen oxides in industrial stack gases

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB799159A (en) * 1955-10-07 1958-08-06 Du Pont Improvements in or relating to the disposal of nocuous gases containing nitrogen oxide fumes
US2910343A (en) * 1955-12-08 1959-10-27 Du Pont Process for catalytically reducing nitrogen oxides in industrial stack gases
GB829581A (en) * 1955-12-08 1960-03-02 Du Pont Improvements in or relating to the disposal of noxious gases containing nitrogen oxide fumes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2314441A1 (en) * 1975-06-14 1977-01-07 Hygrotherm Eng Ltd METHOD AND APPARATUS FOR INCINERATION OF MATERIALS CONTAINING AMMONIA

Also Published As

Publication number Publication date
FR2193642B1 (en) 1975-03-07

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