DE3440808C2 - - Google Patents

Info

Publication number
DE3440808C2
DE3440808C2 DE19843440808 DE3440808A DE3440808C2 DE 3440808 C2 DE3440808 C2 DE 3440808C2 DE 19843440808 DE19843440808 DE 19843440808 DE 3440808 A DE3440808 A DE 3440808A DE 3440808 C2 DE3440808 C2 DE 3440808C2
Authority
DE
Germany
Prior art keywords
ceramicizing
piles
substances
catalysts
environmentally friendly
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
DE19843440808
Other languages
German (de)
Other versions
DE3440808A1 (en
Inventor
Heinz Dipl.-Ing. Hoelter
Heinrich Dipl.-Ing. 4390 Gladbeck De Igelbuescher
Heinrich Ing.(Grad.) 4600 Dortmund De Gresch
Heribert Dipl.-Ing. 4390 Gladbeck De Dewert
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19843440808 priority Critical patent/DE3440808A1/en
Priority to DE19853523356 priority patent/DE3523356A1/en
Publication of DE3440808A1 publication Critical patent/DE3440808A1/en
Application granted granted Critical
Publication of DE3440808C2 publication Critical patent/DE3440808C2/de
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08—Heat treatment
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/18—Carbon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Katalysatoren zur Umwandlung von NO x in umweltfreundliche Stoffe durch Versetzen der aus Waschbergen oder Flotationsbergen des Untertagebergbaus stammenden Trägermassen mit C-Stoffen und anschließendes Keramisieren.The invention relates to a process for the preparation of catalysts for converting NO x into environmentally friendly substances by adding C-substances to the carrier materials originating from washing piles or flotation piles and then ceramizing them.

Ein derartiges Verfahren ist Gegenstand der nicht vorver­ öffentlichten DE-OS 34 22 779.Such a method is not the subject of the previous public DE-OS 34 22 779.

Es ist bekannt, daß Katalysatoren erst durch die Zugabe eines Additivs, z. B. Ammoniak (NH3) in einem bestimm­ ten Mol-Verhältnis die Möglichkeit bieten, NO x aus Abgasen in umweltfreundliche Stoffe, wie elementaren Stickstoff und Wasser, umzuwandeln. Durch die Zugabe von Ammoniak (NH3) als Additiv treten jedoch Schwierigkeiten auf, die die Umwelt­ freundlichkeit dieser Verfahrenstechnik beeinflussen.It is known that catalysts can only be added by adding an additive, e.g. B. ammonia (NH 3 ) in a certain molar ratio offer the opportunity to convert NO x from exhaust gases into environmentally friendly substances such as elemental nitrogen and water. However, the addition of ammonia (NH 3 ) as an additive causes difficulties which affect the environmental friendliness of this process technology.

Von diesem Stand der Technik ausgehend liegt der Erfindung die Aufgabe zugrunde, unter Vermeidung vorerwähnter Nachteile, das eingangsgemäße Verfahren hinsichtlich der erzielbaren Wirksamkeit der durch dieses hergestellten Katalysatoren weiter zu verbessern.The invention is based on this prior art  based on the task, avoiding the aforementioned disadvantages, the initial method with regard to the achievable Effectiveness of the catalysts produced by this further to improve.

Erfindungsgemäß wird dies dadurch erreicht, daß nur so weit keramisiert wird, daß ein Teil des vorhandenen Kohlenstoffs im Keramisierungsmaterial als Schwerpunkt erhalten bleibt. Auf diese Weise wird erreicht, daß die Umwandlung von NO x über die so hergestellten Katalysatoren ohne Ammoniak (NH3) oder ein anderes Additiv in freien Stickstoff, Kohlendioxid und Wasser erfolgen kann.This is achieved according to the invention in that the ceramization is carried out only to such an extent that part of the carbon present in the ceramization material is retained as the focal point. In this way it is achieved that the conversion of NO x over the catalysts thus produced can take place without ammonia (NH 3 ) or another additive in free nitrogen, carbon dioxide and water.

Beispielexample

Eine Trägermasse, die zu 75 Gew.-% aus Wasch- oder Flotationsbergen des Untertagebergbaus und zu 25 Gew.-% aus aufgemahlener Kohle, Sägemehl und/oder Torf besteht, wird bei einer Temperatur von 800-850°C keramisiert. Auf diese Weise wurde ein Katalysator erhalten, der sich in bezug auf seine Wirksamkeit bei der Umwandlung von NO x in umweltfreundliche Produkte als besonders vorteilhaft erwies.A carrier mass consisting of 75% by weight of washing or flotation piles from underground mining and 25% by weight of ground coal, sawdust and / or peat is ceramized at a temperature of 800-850 ° C. In this way a catalyst was obtained which proved to be particularly advantageous in terms of its effectiveness in converting NO x into environmentally friendly products.

Claims (1)

Verfahren zur Herstellung von Katalysatoren zur Umwandlung von NO x in umweltfreundliche Stoffe durch Versetzen der aus Waschbergen oder Flotationsbergen des Untertagebergbaus stammenden Trägermassen mit C-Stoffen und anschließendes Keramisieren, dadurch gekennzeichnet, daß nur so weit keramisiert wird, daß ein Teil des vorhandenen Kohlenstoffs im Keramisierungsmaterial als Schwelprodukt erhalten bleibt.Process for the preparation of catalysts for the conversion of NO x into environmentally friendly substances by adding C-substances to the carrier masses from washing piles or flotation piles of underground mining and subsequent ceramicizing, characterized in that the ceramicizing is carried out only to such an extent that part of the carbon present in the ceramicizing material remains as a smoldering product.
DE19843440808 1984-11-08 1984-11-08 Catalyst for NOx production, preferably downstream of fossil-fuel power stations Granted DE3440808A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19843440808 DE3440808A1 (en) 1984-11-08 1984-11-08 Catalyst for NOx production, preferably downstream of fossil-fuel power stations
DE19853523356 DE3523356A1 (en) 1984-11-08 1985-06-29 Preparation of catalysts for NOx reduction, preferably downstream of fossil-fuel power stations, by ceramicising the composition with the exclusion of air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843440808 DE3440808A1 (en) 1984-11-08 1984-11-08 Catalyst for NOx production, preferably downstream of fossil-fuel power stations

Publications (2)

Publication Number Publication Date
DE3440808A1 DE3440808A1 (en) 1986-05-07
DE3440808C2 true DE3440808C2 (en) 1987-07-23

Family

ID=6249794

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843440808 Granted DE3440808A1 (en) 1984-11-08 1984-11-08 Catalyst for NOx production, preferably downstream of fossil-fuel power stations

Country Status (1)

Country Link
DE (1) DE3440808A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620425C1 (en) * 1986-06-18 1987-06-19 Bergwerksverband Gmbh Process for the production of an activated carbon catalyst
SE516913C2 (en) 1999-10-26 2002-03-19 Sandvik Ab Tool for chip separating machining where the cutting body is fastened with a drawbar

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1221639A (en) * 1958-12-24 1960-06-02 Houilleres Bassin Du Nord Process for the preparation of ceramic pastes, in particular from coal shale and equipment allowing the implementation of this process
JPS602270B2 (en) * 1976-04-08 1985-01-21 日本碍子株式会社 Cordierite ceramic honeycomb and its manufacturing method
DE3422779A1 (en) * 1984-06-20 1985-12-19 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Use of ceramicising substrate compositions for producing catalysts

Also Published As

Publication number Publication date
DE3440808A1 (en) 1986-05-07

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