Electricite De France - Service National

Centre National De La Recherche Scientifique

Sorbonne Université

Paris Sciences Et Lettres

Paris Sciences Et Lettres-Quartier Latin

Ecole Nationale Superieure De Chimie Paris

École Nationale Superieure De Chimie De Paris - Chimie Paristech

Simeon Cavadias

Jacques Amouroux

Stéphanie Ognier

Michael Tatoulian

Demetre Rapakoulias

Maria Elena Galvez-parruca

Patrick Da Costa

Maria Mikhail

Inês Sofia Biscaya Semedo Pereira Da GRAÇA

Magdalena Nizio

María Del Carmen Bacariza Rey

Carlos Manuel Faria De Barros Henriques

José Manuel Felix Madeira Lopes

A substance to be treated is brought into a treatment column (10) and kept in suspension (11) in the latter by the injection (A) of a fluidizing gas into the bottom part of the column. According to the invention, a plasma is injected (D) into the column in at least one direction within a radial plane relative to the column. Preferably, the plasma is produced by high-frequency induction and injected at a pressure of the order of atmospheric pressure, so as not to perturb the fluidization of the bed and so as to permit good interpenetration of the various gas streams. Applications to the synthesis of nitrogen oxides, to the gasification of a carbonaceous substance and to the reduction of ores, as well as to the roasting or drying of materials.

Process and installation for heating a fluidized bed by plasma injection

The present invention relates to a process for the preparation of nitrogen oxides (NO and NO.sub.2) by the reaction of nitrogen and oxygen in a plasma furnace. According to this process, a plasma of oxygen and nitrogen is introduced into the reaction chamber of the plasma furnace, whereof the internal surface of the walls is covered with a catalyst chosen from tungsten trioxide (WO.sub.3) and molybdenum trioxide (MoO.sub.3).

Process and apparatus for the preparation of nitrogen oxides

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Paris, France

Simeon Cavadias