EP0080491A1 - Procede d'elimination de substances toxiques dans des gaz d'echappement - Google Patents

Procede d'elimination de substances toxiques dans des gaz d'echappement

Info

Publication number
EP0080491A1
EP0080491A1 EP19820901839 EP82901839A EP0080491A1 EP 0080491 A1 EP0080491 A1 EP 0080491A1 EP 19820901839 EP19820901839 EP 19820901839 EP 82901839 A EP82901839 A EP 82901839A EP 0080491 A1 EP0080491 A1 EP 0080491A1
Authority
EP
European Patent Office
Prior art keywords
packing
coated
slurry
added
calcium
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.)
Ceased
Application number
EP19820901839
Other languages
German (de)
English (en)
Inventor
Albin BÖHMEKE
Rainer Fries
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.)
BOHMEKE ALBIN
Original Assignee
BOHMEKE ALBIN
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 BOHMEKE ALBIN filed Critical BOHMEKE ALBIN
Publication of EP0080491A1 publication Critical patent/EP0080491A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/508—Sulfur oxides by treating the gases with solids
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • 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
    • 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
    • B01D53/8603—Removing sulfur compounds
    • B01D53/8609—Sulfur 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

Definitions

  • the invention relates to a method for eliminating pollutants from exhaust gases.
  • the mixture is used, for example, in the form of brown-black, hard, porous, 2-3 mm large grains in CO filters of gas masks so that they can be used in rooms contaminated with gas from carbon monoxide.
  • the carbon monoxide passing through this mixture is converted catalytically into carbon dioxide at room temperature.
  • the invention is based on the object of proposing a method with which pollutants, in particular fluorine, but also sulfur dioxide and sulfur trioxide, can be removed from exhaust gases without great expenditure on apparatus.
  • the method according to the invention should also be able to be used to remove carbon monoxide by oxidation to carbon dioxide in exhaust gases.
  • fillers known per se are coated with a slurry which reacts with the pollutants, contains a calcium compound or contains a mixture of metal oxides and serves as a catalyst, to which small amounts of methyl cellulose are added as binders, and coated them
  • Filling bodies are fed to a container through which exhaust gases flow, via an exhaust gas line, the coated filling bodies being shaped and loosely in the container are filled up so that the exhaust gases can easily flow through them.
  • the fillers coated with a slurry containing a calcium compound and loosely filled into a container are used in an exhaust pipe of an industrial plant for the removal of, in particular, fluorine, sulfur dioxide and sulfur trioxide.
  • the fillers coated with the mixture of metal oxides and serving as a catalyst and loosely filled in the container are inserted into an exhaust gas device for the oxidation of carbon monoxide.
  • the advantages achieved by the invention consist essentially in the fact that the method according to the invention can be carried out inexpensively without a large apparatus structure and thus less work and that the use of known, saddle-shaped fillers means that the exhaust gas flow is flat over the entire diameter of the container (e.g. with a ceramic sleeve ) is distributed so that there is already a complete reaction of the exhaust gases in the lower part of the container with the coating of the packing and, as a result, the exhaust gas leaves the ceramic filter completely cleaned.
  • the filling bodies being filled up loosely in the container, a sufficiently free volume between the filling bodies is achieved, so that the required flow rate is possible without the use of a fan.
  • the saddle-shaped packing also offer a very low flow resistance in their packing position, so that the use of fans is also eliminated for this reason.
  • the invention makes it possible to wash off the products obtained in the reaction with the calcium compound without any particular complex separation processes, so that these chemical industries are available again.
  • the process according to the invention has the advantage that it enables the very toxic carbon monoxide gas to be removed catalytically by oxidation in carbon dioxide in a simple manner and on a technically larger scale.
  • iron (III) rhodanide was chosen as the indicator because this compound has a deep red color and its iron is chemically bound in the presence of fluorine in the flue gas, which leads to the decolorization of the indicator.
  • this indicator with a pH of about 1.5, a second one with the same composition was produced, but which had a pH of about 2.5, in order to avoid the strong carbon dioxide elimination when the first indicator reacted with the calcium carbonate counteract.
  • the first indicator with a pH of about 1.5 was made from iron chloride FeCl 3 .6H 2 O with a mol. of 270.3 and ammonium thiocyanate NH 4 SCN with one mol. made from 76.1. These two connections react as follows:
  • the second indicator with a pH-Wart of 2.5 was made from iron chloride FeCl 3 .6H 2 O with a mol. of 270.3 and potassium rhodanide KSCN with one mol. of 97.1. These two connections react as follows:
  • the varauch was stopped after 12 minutes and the usability of the indicator used was determined.
  • the container with the hydrofluoric acid was weighed back, minimal consumption of hydrofluoric acid was found, which led to the conclusion that only the indicator had reacted with the hydrofluoric acid.
  • Example 3 Calcium bentonite and calcium carbonate were used as calcium compounds in this experiment.
  • the mix approach was as follows:
  • the dried, coated packing elements were refilled into the absorption tube up to a height of 90 cm and then used in the apparatus.
  • the balanced container with the hydrofluoric acid was placed as before in the lower 90 ° elbow. After switching on Abzugskana.l and hair dryer, the observation values listed in Table III were obtained.
  • Example 1 after 12 min 50 cm decolorization
  • Example 2 after 12 min 35 cm decolorization
  • Example 3 after 24 min 10 cm decolorization
  • Example 4 In order to improve the test result even more, only calcium carbonate was used for coating the saddle-shaped packing. For better adhesion of the coating to the packing, a little methyl cellulose in a ratio of 1: 200 to the water content was added as a binder. To counteract the reaction of indicator with calcium carbonate, the second indicator with a pH of 2.5 was used in this experiment. The mix approach for this experiment was as follows:
  • the coating weight is lower.
  • the dried, coated packing bodies were filled up to a height of 90 cm as before into the absorption tube, the container was weighed with the hydrofluoric acid and placed in the 90 ° elbow. After switching on the extraction duct and hair dryer, the observation values given in Table IV are obtained.
  • Example 5 In order to further improve the test result obtained from Example 4, the following mixture was made:
  • the dried, coated packing was placed in the absorption tube and then inserted into the apparatus.
  • the hydrofluoric acid was weighed out with the container as before. After switching on the ventilation duct and hair dryer, the observation values listed in Table V were obtained.
  • the white zone had a length of 8 cm, only in this Zone Ka lzi formed around u u id.
  • the overlying filler bodies had not come into contact with fluorine, which revealed an examination of the filler bodies after they had been poured out.
  • X-ray diffraction revealed that fluorine had not passed the decolorization zone.
  • a sample was taken from the white zone and another from the packing elements above.
  • the X-ray diffraction pattern clearly showed reflections of calcium fluoride and besides, in a weakened form, reflections of calcium carbonate, from which it could be concluded that not all of the calcium carbonate was present in this zone either. with f luor react Ie rI hall e. this zone was therefore able to dazzle even more.
  • the air led into the exhaust duct was examined for hydrogen fluoride using a Dräger tube.
  • the scale of the tubes ranged from 1.5 to 15 ppm HF. Despite repeated measurements, no discoloration of the tubes was found , which showed that there was no longer any hydrogen fluoride in this air, so that it had been completely absorbed by the coating of the filling bodies.
  • the amount of CaCO 3 required for this was 4784.9 g
  • a volume of 1m 3 of coated, saddle-shaped packing material could be produced within 24 days bind all of the fluorine in the flue gas analysis given above, for which the specified volume of the packing would have to be coated with about 113 kg of calcium carbonate.
  • known, saddle-shaped fillers are coated with a known mixture consisting of metal oxides, serving as a catalyst, together with a small proportion of methyl cellulose, whereby according to one embodiment of the invention, methyl cellulose is used as a catalyst, which consists of metal oxides Mixture is preferably added in a ratio of 1: 100.
  • the coated packing elements are held in a container through which exhaust gases can flow and which, according to a further development of the invention, can be closed on both sides by a wire mesh.
  • a container is inexpensive to manufacture and, with the coated, saddle-shaped packing elements, can easily be arranged in an exhaust gas device, for example in an exhaust pipe of heating systems or in an exhaust pipe of motor vehicle engines.
  • the packing elements coated with metal oxides and the packing elements coated with the slurry containing a calcium compound must each be kept in separate filling devices so that the fully reacted calcium coating on the packing elements can be washed off and their reaction products can be collected for reuse. and that the coating consisting of metal oxides, which is applied to the packing and serves as a catalyst, is not consumed and is therefore available for further oxidation of the carbon monoxide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

Procede d'elimination de substances toxiques dans des gaz d'echappement, en particulier des oxydes de soufre et des vapeurs d'halogene, en faisant reagir un compose de calcium avec les oxydes de soufre ou les vapeurs d'halogene, le compose de calcium etant melange avec un agent de liaison soluble et transforme en solides de garniture, de forme predeterminee, qui sont seches et disposes de maniere lache dans le courant de gaz d'echappement de telle maniere qu'un tirage suffisant soit obtenu pour le fonctionnement de l'installation produisant les gaz.
EP19820901839 1981-06-05 1982-06-05 Procede d'elimination de substances toxiques dans des gaz d'echappement Ceased EP0080491A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3122349 1981-06-05
DE19813122349 DE3122349C2 (de) 1981-06-05 1981-06-05 Füllkörper für einen von Abgasen durchströmten Behälter, Verfahren zum Herstellen der Füllkörper und Verwendung zur Beseitigung von Schadstoffen, insbesondere von Flußsäure, Schwefeldioxid und Schwefeltrioxid aus diesen Abgasen

Publications (1)

Publication Number Publication Date
EP0080491A1 true EP0080491A1 (fr) 1983-06-08

Family

ID=6133994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820901839 Ceased EP0080491A1 (fr) 1981-06-05 1982-06-05 Procede d'elimination de substances toxiques dans des gaz d'echappement

Country Status (3)

Country Link
EP (1) EP0080491A1 (fr)
DE (1) DE3122349C2 (fr)
WO (1) WO1982004406A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11369922B2 (en) * 2016-04-04 2022-06-28 Cppe Carbon Process & Plant Engineering S.A. Catalyst mixture for the treatment of waste gas

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141802A3 (fr) * 1983-10-07 1987-01-07 VOEST-ALPINE Aktiengesellschaft Procédé d'élimination du soufre ou des composés sulfureux et/ou d'autres polluants de gaz chauds ainsi qu'un dispositif pour la réalisation de ce procédé
FR2580948A1 (fr) * 1985-04-30 1986-10-31 Erny Antoine Procede de filtration de fumees et de gaz de combustion et dispositif pour la mise en oeuvre de ce procede
DE3520671A1 (de) * 1985-06-08 1986-12-11 Kernforschungsanlage Jülich GmbH, 5170 Jülich Verfahren zur reinigung heisser abgase
DE3816768C1 (fr) * 1988-05-17 1989-10-12 Steuler-Industriewerke Gmbh, 5410 Hoehr-Grenzhausen, De

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE396270A (fr) * 1932-05-12
FR1133119A (fr) * 1954-11-23 1957-03-21 Chempatents Catalyseur pour la récupération des combustibles utiles à partir de gaz hydrocarburés
US3362783A (en) * 1963-12-23 1968-01-09 Texaco Inc Treatment of exhaust gases
NL7005974A (fr) * 1970-04-24 1971-10-26
BE790815A (fr) * 1971-11-01 1973-04-30 Exxon Research Engineering Co Desulfuration de gaz de carneau
DE2459272C3 (de) * 1974-12-14 1978-08-17 Fa. Hermann Wegener, 3000 Hannover Masse zum Entfernen von umweltschädlichen Gasen, insbesondere von Schwefeloxiden, Schwefelwasserstoff und Halogenwasserstoffen aus Industrieabgasen
DE2735683A1 (de) * 1977-08-08 1979-02-22 Pittsburgh E & E Systems Verfahren zur reinigung von abgasen
EP0029564A1 (fr) * 1979-11-23 1981-06-03 Mannesmann Veba Umwelttechnik Gmbh Procédé pour la séparation de composants gazeux d'un courant de gaz, en particulier d'un courant de fumée

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8204406A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11369922B2 (en) * 2016-04-04 2022-06-28 Cppe Carbon Process & Plant Engineering S.A. Catalyst mixture for the treatment of waste gas

Also Published As

Publication number Publication date
WO1982004406A1 (fr) 1982-12-23
DE3122349C2 (de) 1987-04-30
DE3122349A1 (de) 1982-12-23

Similar Documents

Publication Publication Date Title
DE2414333C3 (de) Verfahren zur selektiven Abtrennung von Stickstoffoxiden aus Abgasen
DE3108991C2 (fr)
DE69606582T2 (de) Verfahren zur Herstellung von sorbierenden Zusammenstellungen
DE3017896A1 (de) Verfahren zur katalytischen reduktion von stickstoffoxiden in gasmischungen
DE2646753C3 (de) Verfahren zur katalytischen Behandlung von Abgasen
DE2705901A1 (de) Verfahren zur behandlung eines schwefeloxide enthaltenden gases
EP0329674B1 (fr) Catalyseur pour eliminer les oxydes azotes contenus dans les gaz d'echappement
DE3531871C2 (fr)
DE2346000C3 (de) Verfahren zur Entfernung von Stickstoffoxiden aus Industrieabgasen
DE2433076A1 (de) Verfahren zur entfernung von stickstoffoxyden aus abgasen
EP0514729B1 (fr) Procédé pour éliminer l'ammoniac se trouvant dans les gaz
DE2525881A1 (de) Verfahren zum entfernen von stickstoffoxiden aus abgasen
AT392465B (de) Verfahren zum herstellen von klinkern
EP0080491A1 (fr) Procede d'elimination de substances toxiques dans des gaz d'echappement
DE736975C (de) Verfahren zur Gewinnung von elementarem Schwefel aus Gasen, die Schwefelwasserstoff, Kohlenoxysulfid und Schwefelkohlenstoff enthalten
DE3821480A1 (de) Verfahren zur entfernung von stickoxiden aus verbrennungsabgasen
EP0568903A1 (fr) Procédé pour le traitement des matériaux contenant des métaux lourds
DE2646627A1 (de) Verfahren zur herstellung von schwefel
DE2009374C3 (de) Verfahren zur Herstellung von Hochtemperatur-Katalysatoren auf Eisenoxidgrundlage
DE60021078T2 (de) Verfahren zur neutralisierung und/oder regeneration saurer bäder und anlage zum durchführen dieses verfahrens
DE2415892A1 (de) Verunreinigungssteuerung
DE3507718A1 (de) Verfahren zur reinigung von rauchgasen
DE3223117A1 (de) Verfahren zum entschwefeln von abgasen
EP0106250B1 (fr) Procédé d'élimination du dioxyde de nitrogène de gaz d'échappement
DE2348436C3 (de) Schwermetalladsorbens und Verfahren zu seiner Herstellung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830301

AK Designated contracting states

Designated state(s): AT BE CH FR GB LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19861205

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BOEHMEKE, ALBIN

Inventor name: FRIES, RAINER