Patent
Process for removing nitric oxides from processing exhaust gases
TLDR
In this article, exhaust gases containing residual nitric oxide constituents from a processing operation are maintained at an elevated pressure, heated to from 260° to 340° C, and subjected to catalytic reduction with ammonia to produce purified exhaust gases.Abstract:
Exhaust gases containing residual nitric oxide constituents from a processing operation are maintained at an elevated pressure, heated to from 260° to 340° C., and subjected to catalytic reduction with ammonia to produce purified exhaust gases. The pressure of the thus purified exhaust gases is then relieved in an expansion turbine.read more
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Patent
Process for the production of high purity carbon dioxide
Akhilesh Kapoor,Carl Schatz +1 more
TL;DR: In this paper, food grade carbon dioxide is produced from oxyfuel fired glass-making furnace waste gas by a series of steps including quenching the waste gas with aqueous quench liquid, dry-filtering sulfur salt from the gas, scrubbing the filtered gas with the remaining sulfur dioxide, and using the suspension as part or all of the above-mentioned aQ liquid.
Patent
Process for the selective catalytic reduction of nitrogen oxides
TL;DR: In this article, a process for the selective catalytic reduction of nitrogen oxides is described, in which the nitrogenoxide-containing gases are mixed with the reducing agent and the mixture is passed at 150 to 600@C and a flow velocity of 0.5 to 5 cm/s through at least one catalytically acting filter element which has a thickness of 2 to 20 mm and comprises a ceramic support material and the catalytic active substances.
Patent
Process for the manufacture of a catalyst for the reduction of nitrogen oxides in exhaust gases
Claus Prof Dr Flockenhaus,Erich Hackler,Karl Heinrich Laue,Klaus Merkel,Arnold Max,Werner Stender,Jansen Johann,Hartmut Dr Kainer,Daniel Grimm,Blagoje Dr. Levkov +9 more
TL;DR: In this paper, a process for the manufacture of a catalytic catalyst for the reduction of nitrogen oxides in exhaust gases is described, which is suitable for catalytic reduction with ammonia, and the process comprises screening a natural goethite iron ore to the required grain size and then treating the ore with sulfuric acid.
Patent
A METHOD AND APPARATUS FOR REMOVING NOx AND N2O FROM A GAS
TL;DR: In this paper, a method for reducing the content of nitrogen oxides NOx and nitrous oxide N2O in an input gas, comprising the steps of: treating said gas with a first amount of a NOx reducing agent in a first de-NOx catalytic bed; treating the effluent of said first de -NOx catalyst bed in at least one de-N2O catalyst bed for removal of N 2O.
Patent
Process and plant for preparing nitric acid
TL;DR: In this paper, a residual gas containing nitrous gases was taken off from the plant section of a nitric acid plant and conveyed to a residual-gas cleaning apparatus, where ammonia-containing wastewater obtained in the at least one first ammonia vaporizer may be conveyed to the residual gas cleaning apparatus.
References
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Patent
Selective removal of oxides of nitrogen from gas mixtures containing oxygen
Helmut Nonnenmacher,Klaus Kartte +1 more
TL;DR: In this paper, the authors describe a method for removing nitrogen oxides from gas mixtures containing oxygen by reduction with at least the stoichiometric amount of ammonia in the presence of a catalyst comprising one or more of the oxides of vanadium, molybdenum or tungsten.
Patent
Tail gas nitrogen oxide abatement process
TL;DR: In this paper, a rotary wheel reactor with a preheat zone was used to increase the temperature of the inlet tail gas stream to ignition temperature, and a reaction zone where nitrogen oxides were reduced and heat of reaction was removed.