DE579420C - Process for the catalytic conversion of the nitrogen oxides contained in the raw coke oven gas - Google Patents
Process for the catalytic conversion of the nitrogen oxides contained in the raw coke oven gasInfo
- Publication number
- DE579420C DE579420C DET40519D DET0040519D DE579420C DE 579420 C DE579420 C DE 579420C DE T40519 D DET40519 D DE T40519D DE T0040519 D DET0040519 D DE T0040519D DE 579420 C DE579420 C DE 579420C
- Authority
- DE
- Germany
- Prior art keywords
- coke oven
- nitrogen oxides
- oven gas
- catalytic conversion
- oxides contained
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/34—Purifying combustible gases containing carbon monoxide by catalytic conversion of impurities to more readily removable materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
Verfahren zur katalytischen Umwandlung der im rohen Koksofengas enthaltenen Stickoxyde Das Koksofengas enthält geringe Mengen von Stickoxyden, etwa 30 Volumteile je i ooo ooo Volumteile Gas, die sich bei seiner Zerlegung durch Kompression und Tiefkühlung sehr störend bemerkbar machen und deshalb vor seinem Eintritt in die Trennapparatur entfernt werden müssen.Process for the catalytic conversion of the nitrogen oxides contained in the crude coke oven gas The coke oven gas contains small amounts of nitrogen oxides, about 30 parts by volume per 1,000,000 parts by volume of gas, which are very disturbing when decomposed by compression and freezing and are therefore removed before it enters the separation apparatus Need to become.
Man hat versucht, die im Koksofengas vorhandenen Stickoxyde auf katalytischem Wege in Ammoniak umzuwandeln und sie so unschädlich zu machen. Die dazu verwendeten Katalysatoren, wie Kupfer, werden jedoch durch Ammoniak, Schwefelwasserstoff, Blausäure und hochsiedende Bestandteile des Koksofengases, wie Pyridin, vergiftet, weshalb die peinlichste Entfernung dieser Stoffe aus dem Gas unbedingt nötig ist.Attempts have been made to catalyze the nitrogen oxides present in the coke oven gas Ways to convert it into ammonia and thus render it harmless. The ones used for this However, catalysts, such as copper, are replaced by ammonia, hydrogen sulfide, and hydrocyanic acid and high-boiling components of the coke oven gas, such as pyridine, are poisoned, which is why the most painful removal of these substances from the gas is absolutely necessary.
Es wurde nun gefunden, daß Koksofengas, welches diese Verunreinigungen, insbesondere Schwefelverbindungen, enthält, von Stickoxyden befreit werden kann, wenn man deren katalytische Umwandlung an Sulfiden der Metalle der sechsten Gruppe des periodischen Systems, insbesondere an Molybdän- und Wolframsulfiden vornimmt. Diese Sulfide können entsprechend geformt oder auf Träger, wie Bimsstein, Asbest, keramische Massen u. a., aufgebracht, zur Anwendung kommen. Die Katalysatoren sind schon bei i 5o° wirksam; als günstigste Reaktionstemperatur wurden Zoo bis 23o° gefunden.. Bei diesen Temperaturen erfolgt die Umwandlung der Stickoxyde in Ammoniak mit erheblicher Geschwindigkeit, ohne daß, etwa gleichzeitig im Gas vorhandener Sauerstoff mit Wasserstoff reagiert, so daß@ keine Wassterstoffvexluste durch Bildung von Wasser eintreten. Die Beseitigung der Stickoxyde kann bei gewöhnlichem oder erhöhtem Druck vorgenommen werden.It has now been found that coke oven gas, which these impurities, in particular contains sulfur compounds, can be freed from nitrogen oxides, if one considers their catalytic conversion on sulphides of the metals of the sixth group of the periodic system, especially on molybdenum and tungsten sulfides. These sulfides can be shaped accordingly or on carriers such as pumice stone, asbestos, ceramic masses, inter alia, applied, are used. The catalysts are already effective at i 50 °; the most favorable reaction temperature was zoo up to 23o ° found .. At these temperatures the nitrogen oxides are converted into ammonia at a considerable rate, without, approximately at the same time, existing in the gas Oxygen reacts with hydrogen so that there is no loss of hydrogen through formation enter of water. The elimination of nitrogen oxides can be done with ordinary or increased pressure.
Ausführungsbeispiel i Keramische Masse wurde mit 2o% Ammoniumsulfomolybdat in wässeriger Lösung imprägniert, zur Trockne gebracht und bei 2io° im Wasserstoffstrom erhitzt. Über diesen Katalysator wurde bei 2io° unter Atmosphärendruck Koksofengas, das auf i ooo ooo Volumteile 6o Volumteile Stickoxyd enthielt, mit einer Raumgeschwindigkeit von geleitet. Das Stickoxyd wurde dabei zu c)8% in Ammoniak umgewandelt. Ausführungsbeispiel a Der Katalysator wurde in folgender Weise hergestellt. $imsstein wurde mit io % Ammoniummolybdat imprägniert und bei 2io° mit Schwefelwasserstoff behandelt. Der so erhaltene Katalysator zeigte bezüglich der Stickozydreduktion dieselbe Wirksamkeit wie der in Ausführungsbeispiel i beschriebene.Exemplary embodiment i Ceramic mass was impregnated with 20% ammonium sulfomolybdate in aqueous solution, brought to dryness and heated at 20 ° in a stream of hydrogen. Coke oven gas, which contained 60 parts by volume of nitrogen oxide to 100,000 parts by volume, was passed over this catalyst at 20 ° under atmospheric pressure at a space velocity of directed. The nitrogen oxide was converted to c) 8% in ammonia. Embodiment a The catalyst was prepared in the following manner. $ imsstein was impregnated with 10% ammonium molybdate and treated with hydrogen sulfide at 20 °. The catalyst obtained in this way showed the same effectiveness in terms of nitrogen oxide reduction as that described in embodiment i.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS579420X | 1931-04-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE579420C true DE579420C (en) | 1933-06-26 |
Family
ID=5453685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DET40519D Expired DE579420C (en) | 1931-04-22 | 1932-04-09 | Process for the catalytic conversion of the nitrogen oxides contained in the raw coke oven gas |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE579420C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3544936A1 (en) * | 1985-09-26 | 1987-06-25 | Hoelter Heinz | Free-flying body catalyst |
-
1932
- 1932-04-09 DE DET40519D patent/DE579420C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3544936A1 (en) * | 1985-09-26 | 1987-06-25 | Hoelter Heinz | Free-flying body catalyst |
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