Casale Sa

Giada Franceschin

Raffaele Ostuni

Iacopo Cerea

Pierdomenico Biasi

Jean François Granger

Jean Francois Granger

A nitric acid production process, comprising tertiary abatement of N2O and NOx on a tail gas withdrawn from an absorption stage, said abatement including passing the tail gas over a sequence of a deN2O stage comprising a Fe-z catalyst and a deNOx stage comprising a V2O5-TiO2 catalyst in the presence of gaseous ammonia, wherein the tail gas at the inlet of deN2O stage and the tail gas at the inlet of deNOx stage have a temperature greater than 400&#xb0; C.

Process for the production of nitric acid with tertiary abatement of N2O and NOx

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

Process for making a hydrogen-containing synthesis gas () from a hydrocarbon feedstock (), comprising the reforming of said hydrocarbon feedstock and purification of raw synthesis gas, said purification comprising shift conversion of carbon monoxide into carbon dioxide and subsequent absorption of carbon dioxide into an absorbing medium (), resulting in a stream of a CO2-rich medium (), and regeneration of said medium with recovery of CO2 absorbed therein, wherein said raw synthesis gas () is produced by the reforming step at a pressure of at least 45 bar, said regeneration of the CO2-loaded medium includes a step of chemical regeneration and the CO2-loaded medium has a temperature of at least 150&#xb0; C. during said chemical regeneration.

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Como, Italy

Giada Franceschin