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Titre: PROCESS FOR ELIMINATING HYDROGEN SULFIDE FROM GAS MIXTURES Auteur:Henning, Klaus-Dirk; Juentgen, Harald; Klein, Juergen Date:
02 February 1982
Sujet:Performing Operations ; Transporting ; Physical OR Chemical Processes OR Apparatus In General ; Separation ; Medicine ; Sciences ; Chemistry Description:
In a process for eliminating impurities and undesirable components from gas mixtures by passing the mixture through an activated carbon-containing adsorber. Sulfur compounds including hydrogen sulfide are eliminated by increasing the oxygen contents of the gas mixture which contains at least oxygen and/or sulfur dioxide in addition to the hydrogen sulfide to an extent that an oxygen hydrogen sulfide molar ratio is obtained in the gas mixture which is between about 1 : 0.45 and 1 : 0.65. The process may also be carried-out with two groups of absorbers where in the first adsorber the elemental sulfur is eliminated in liquid form and where the remaining minor portion of sulfur in vaporous or mist-like form is then removed in the second group of adsorber or adsorbers by adsorption on the activated coal. The purified gas is then recovered from the adsorber or with two groups of adsorbers from the second group of adsorber or adsorbers and the activated carbon is subjected to periodic regeneration cycles.
Titre: METHOD FOR OPERATING A DESULFURIZING REACTOR FOR STACK GASES Auteur:Juentgen, Harald; Grochowski, Horst; Schwarte, Juergen Date:
08 July 1980
Sujet:Medicine ; Sciences ; Chemistry Description:
A reactor system for desulfurizing stack gas by means of activated carbon has a reactor through which the activated carbon and stack gases are normally circulated. When the system is shut down the inlet and outlet conduits for the reactor are disconnected from the source of gas to be desulfurized and from the chimney of the installation and are connected together in a closed path through a cooler. A blower in this path serves to continuously recirculate the gases in the path while cooling them. At the same time an inert gas having less than 15% by volume of oxygen is fed into this path in order to maintain it under superatmospheric pressure.
Titre: Method and apparatus for thermal treatment, especially drying, of finely comminuted bulk material Auteur:Gappa; Guenther; Degel; Josef; Juentgen; Harald Date:
03 April 1984
Sujet:Mechanical Engineering ; Lighting ; Heating ; Weapons ; Blasting ; Drying ; Drying Solid Materials OR Objects By Removing Liquid Therefrom ; Performing Operations ; Transporting ; Physical OR Chemical Processes OR Apparatus In General ; Chemical OR Physical Processes, E.G. Catalysis OR Colloidchemistry ; Their Relevant Apparatus ; Medicine ; Sciences ; Chemistry Description:
A method for thermal treatment, especially drying, of finely particulated bulk material comprises the steps of stirring the material in a reactor by means of a rotating stirrer while simultaneously discharging a heated gas under pressure through openings in a hollow arm of the stirrer so as to form in the reactor a whirling fluidized bed from the material, and introducing the necessary amount of heat for the thermal treatment of the material at least in part through a heat exchanger extending into the whirling fluidized bed. The apparatus for carrying out the method mainly comprises an arrangement for feeding the material through an inlet into a reactor forming a whirling chamber in which a rotating stirring device is arranged having at least one hollow stirring arm provided with openings through which a preferably heated gas under pressure is discharged into the material so as to form a whirling fluidized bed in the reactor, a heat exchanger extending through the fluidized bed, and an outlet for discharging the gas and treated material from the reactor. The reactor may also include an arrangement extending into the whirling fluidized bed for retarding flow of the material from the inlet to the outlet of the reactor, which arrangement may be constituted by a heat exchanger of lamellar construction so that the material will pass in cascades through the reactor.
Hanbaba, Peter, Jüntgen, Harald, Peters, Werner
Berichte der Bunsengesellschaft für physikalische Chemie, June 1968, Vol.72(4), pp.554-562
John Wiley & Sons, Inc.
Titre: Nichtisotherme instationäre Messung der aktivierten Diffusion von Gasen in Festkörpern am Beispiel der Steinkohle Auteur:Hanbaba, Peter; Jüntgen, Harald; Peters, Werner Description:
Es wird eine Methode zur Messung des Diffusionskoeffizienten der aktivierten Diffusion von Gasen in porösen Festkörpern angegeben. Gemessen wird die bei gleichzeitiger Desorption ablaufende instationäre Diffusion der Gase aus dem Festkörperkorn heraus bei einem zeitproportionalen Temperaturanstieg. Diese nichtisotherme Versuchsführung bringt den Vorteil mit sich, daß der Desorptionsvorgang innerhalb endlicher Meßzeiten vollständig abläuft und die Aktivierungsenergie des Diffusionsvorganges sofort mitermittelt wird. Als Beispiel wird die Desorption von gesättigten Kohlenwasserstoffen (Methan bis Butan) aus Steinkohlen behandelt. Geschwindigkeitsbestimmender Schritt ist die aktivierte Diffusion durch im Korninnern statistisch verteilte Engstellen. Es ergibt sich eine gute Übereinstimmung zwischen Theorie und Experiment. Die Aktivierungsenergie der verschiedenen Meßgase in Abhängigkeit vom Gasquerschnitt zeigt, daß für die Steinkohlen die Größe der Spaltdurchtritte im selben Bereich liegt wie die Größe von Moleküdurchmessern (4–6 Å). Über die Verteilung der Verengungen innerhalb des Kornes gibt die Körnungsabhängigkeit Auskunft. A method for the measurement of diffusion coefficients for the activated diffusion of gases in porous solids is given. The non‐stationary diffusion of the gas from the granule of solid, which occurs with simultaneous desorption, is measured by a temperature increase that is proportional to time. This nonisothermal procedure has the advantage that the desorption process occurs completely within finite times of measurement, and the activation energy of the diffusion process is obtained at the same time. As an example, the desorption of saturated hydrocarbons (methane to butane) from coal is treated. The rate‐determining step is the activated diffusion through narrow passages which are statistically distributed within the granule. Good agreement is obtained between theory and experiment. The dependence of the activation energy of the various gases studied on the gas cross‐section shows that for coal the size of the narrow passages are in the same range as the size of the molecular diameters (4–6 Å). The granulation dependence gives information on the distribution of the fissures within the particles.
Fait partie de:
Berichte der Bunsengesellschaft für physikalische Chemie, June 1968, Vol.72(4), pp.554-562
Identifiant:
0005-9021 (ISSN); 0005-9021 (E-ISSN); 10.1002/bbpc.19680720413 (DOI)
Titre: Process for eliminating hydrogen sulfide from gas mixtures Auteur:Henning; Klaus-Dirk; Juentgen; Harald; Klein; Juergen Date:
21 April 1981
Sujet:Chemistry ; Metallurgy ; Inorganic Chemistry ; NON-Metallic Elements ; Compounds Thereof ; Medicine ; Sciences ; Chemistry ; Chemistry Description:
In a process for eliminating impurities and undesirable components from gas mixtures by passing the mixture through an activated carbon-containing adsorber. Sulfur compounds including hydrogen sulfide are eliminated by increasing the oxygen contents of the gas mixture which contains at least oxygen and/or sulfur dioxide in addition to the hydrogen sulfide to an extent that a hydrogen sulfide oxygen molar ratio is obtained in the gas mixture which is between about 1:0.45 and 1:0.65. The process may also be carried out with two groups of adsorbers where in the first adsorber the elemental sulfur is eliminated in liquid form and where the remaining minor portion of sulfur in vaporous or mist-like form is then removed in the second group of adsorber or adsorbers by adsorption on the activated coal. The purified gas is then recovered from the adsorber or with two groups of adsorbers from the second group of adsorber or adsorbers and the activated carbon is subjected to periodic regeneration cycles.