Casale Sa

Jean François Granger

Raffaele Ostuni

Iacopo Cerea

Pierdomenico Biasi

Giada Franceschin

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 catalytic bed in at least one de-N2O catalytic bed for removal of N2O; treating the effluent of said at least one de-N2O catalytic bed with a second amount of a NOx reducing agent in a second de-NOx catalytic bed.

Method and apparatus for removing NOx and N2O from a gas

A dual-pressure plant for the synthesis of nitric acid comprising: a reactor () providing a gaseous effluent () containing nitrogen oxides; an absorption tower () nitrogen oxides react with water providing raw nitric acid and, said absorption tower operating at a pressure greater than the pressure of the reactor; a compressor () elevating the pressure of the reactor effluent () to the absorption pressure; said plant also comprising a first bleacher () and a second bleacher (), said first bleacher () stripping with air () nitrogen oxides from the output stream () of the absorption tower () providing a partially stripped nitric acid stream () and a nitrogen oxides-loaded air stream (), the former being fed to the second bleacher () and the latter being recycled to the delivery-side of said compressor ().

Plant for the production of nitric acid, a related process and method of revamping

Integrated process for the synthesis of ammonia and nitric acid, comprising a synthesis of nitric acid including the following steps: a) subjecting a stream of ammonia () to catalytic oxidation, obtaining a gaseous stream containing nitrogen oxides (); b) subjecting said gaseous stream to a process of absorption of nitrogen oxides, providing nitric acid () and a tail gas () containing nitrogen and residual nitrogen oxides; c) subjecting at least a portion of said first tail gas () to a process of removal of nitrogen oxides, providing a nitrogen oxides-depleted tail gas (), and comprising a synthesis of ammonia by catalytic conversion of a make-up gas () comprising hydrogen and nitrogen in an ammonia synthesis loop, wherein at least a portion () of said second tail gas is used as nitrogen source for obtaining said make-up gas ().

Process for nitric acid production

A method for the production of nitric acid, comprising a step of oxidation of ammonia in the presence of a catalyst, comprising a step of monitoring the temperature of said catalyst by at least one contactless infrared sensor.

Growing community of inventors

Auburn Hills, MI, United States of America

Jean François Granger