Linde Aktiengesellschaft

Roland Ritter

Florian Winkler

Paul Leitgeb

Werner Leitmayr

Hans-Jörg Zander

Nicole Schodel

Torsten Stoffregen

Hans Jorg Zander

Hans-Jorg Zander

Nicole SCHÖDEL

A process for removing impurities, in particular oxides of sulphur (SO) and/or oxides of nitrogen (NO) from oxygen-containing gas streams by scrubbing with at least one washing agent is described. In order to achieve effective gas purification in an economical manner even in the case of so-called large 'oxyfuel' furnaces which operate with oxygen as fuel gas, it is proposed to convert the impurities at an elevated pressure of at least 2 bar with at least one basic constituent of the washing agent into salts and to wash out said impurities as dissolved salts.

Method for removing impurities from gas flows comprising oxygen

The invention relates to a process for the removal of NO and NOfrom an oxygen-containing gas stream, which comprises a scrubbing step in which the gas stream is brought into contact with an ammonia-containing scrubbing solution, NO is oxidized to form NOby means of the oxygen present at a pressure of at least 2 bar and temperatures of from 15&#xb0; C. to 60&#xb0; C. and at least part of the NOpresent in the gas stream is converted by means of the ammonia-containing scrubbing solution into ammonium nitrite and a downstream decomposition step in which the ammonium nitrite present in the scrubbing solution is thermally decomposed into elemental nitrogen and water, where the decomposition step is carried out at temperatures of from 121&#xb0; C. to 190&#xb0; C. and a pressure of from 2 to 40 bar. The invention likewise relates to a plant for operation of the process of the invention.

Process and plant for the removal of nitrogen oxides from oxygen-containing gas streams

The invention relates to a process and an apparatus for the treatment of a carbon dioxide-containing gas stream from a large-scale combustion plant, in particular of a power station. The gas stream is separated in a carbon dioxide purification stage R into a gas substream having an increased carbon dioxide content and a gas substream having a reduced carbon dioxide content. The gas substream having an increased carbon dioxide content is fed to a further use and/or storage S. In particular, compression of the carbon dioxide under the ground can reduce the emission of gases which affect the climate. To increase the proportion of compressible CO, it is proposed that the gas substream having a reduced carbon dioxide content is fed to a pressure swing adsorption stage PSA in which a fraction which is rich in carbon dioxide and a fraction which is low in carbon dioxide are produced. The fraction which is rich in carbon dioxide is recirculated to the carbon dioxide purification stage R or is passed directly to further use and/or storage S.

Process and apparatus for the treatment of a carbon dioxide-containing gas stream form a large-scale combustion plant

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Dresden, Germany

Roland Ritter