Abstract: A method for the control of nitrogen oxides content in the combustion fumes of a thermal power plant is disclosed; the method comprises the on-site production of ammonia by the steps of: electrolysis of water as a source of hydrogen; separation of air as a source of nitrogen, formation of a make-up gas and synthesis of ammonia in a suitable synthesis loop; said on-site produced ammonia, or a solution thereof, is used for a process of reduction of nitrogen oxides in the combustion fumes.

Abstract: Method for preparing a synthesis gas suitable for the synthesis of ammonia or methanol, the method comprises the step of feeding to the radiant portion of a primary reformer an oxygen-enriched air obtained by mixing air with an oxygen stream generated by water electrolysis.

Abstract: Process for reducing the content of NOx and N2O from an input tail gas of a nitric acid process, said input tail gas having a temperature lower than 400° C., the process comprising an abatement stage at least including a deN2O stage and deNOx stage and providing a conditioned tail gas having a temperature greater than the input tail gas, wherein, prior to submission to said abatement stage, said input tail gas is pre-heated to a temperature of at least 400° C. by indirect heat exchange with at least a portion of said conditioned gas.

Abstract: A process for producing methanol from an adjusted make-up gas comprising the steps of adjusting the stoichiometric number of the make-up gas fed to the methanol loop with a first stream of hydrogen recovered from a minor portion of makeup gas separated from the main stream, and a second stream of hydrogen recovered from the loop purge; the process further comprises the step of feeding at least a portion of a tail gas rich in methane to a reforming stage for use as a feedstock to produce the make-up gas.

Abstract: Process for the synthesis of methanol comprising: reforming a hydrocarbon feedstock into a synthesis gas containing carbon oxides and hydrogen in a molar ratio (H2—CO2)/(CO+CO2) lower than 1.7; elevating said molar ratio to a value of at least 1.9; compressing said synthesis gas and converting the same into crude methanol; separating said crude methanol into a liquid stream of methanol and a gaseous stream containing unreacted synthesis gas; subjecting at least 50% (vol) of said gaseous stream to hydrogen recovery and mixing the recovered hydrogen with said synthesis gas in order to elevate its molar ratio to a value of at least 1.9.

Abstract: Method for revamping a refining section of a methanol distillation plant comprising a medium pressure (MP) column a low pressure (LP) column, wherein both said columns comprise at least one bottom boiler, a gaseous stream of distilled methanol withdrawn from the MP column is fed to at least one bottom boiler of the LP column and a liquid solution containing methanol withdrawn from the MP column is fed to the LP column, the method of revamping comprising the installation of a high pressure (HP) column; the installation of a line feeding a gaseous stream of distilled methanol from the HP column to at least one bottom boiler of the MP column and the installation of a bottom line for exporting from the HP column a liquid stream consisting essentially of water.

Abstract: A reforming process comprising for production of a hydrogen-containing synthesis gas with a thermally integrated gas turbine engine wherein the hot exhaust gas of the gas turbine engine is the heat source for preheating one or more process streams of the reforming process.

Abstract: Process including the production of a hydrogen-containing synthesis gas by conversion of a hydrocarbon feedstock, wherein said process has a heat input provided by combustion of a plurality of process fuel streams and said plurality of process fuel streams comprises at least one fuel stream of ammonia. Combustion of said at least one fuel stream of ammonia is performed non-catalytically in at least one fired equipment.

Abstract: Process for manufacturing a hydrogen-containing synthesis gas from a natural gas feedstock, comprising the conversion of said natural gas into a raw product gas and purification of said product gas, the process having a heat input provided by combustion of a fuel; said process comprises a step of conversion of a carbonaceous feedstock, and at least a portion of said fuel is a gaseous fuel obtained by said step of conversion of said carbonaceous feedstock, and the Wobbe Index of said fuel is increased by a step of carbon dioxide removal or methanation.

Abstract: A process of reducing the content of nitrogen oxides in a gas, comprising passing the gas over a catalyst suitable for selective catalytic reduction of nitrogen oxides and in the presence of a reducing agent, wherein the catalyst is a FER-zeolite obtainable with a process which does not include a step of iron loading and does not include a step of loading with any transition metal so that said FER-zeolite does not contain ion-exchanged iron and is not loaded with iron or any transition metal.

Abstract: Process for the synthesis of ammonia from natural gas comprising conversion of a charge of desulphurized natural gas and steam, with oxygen-enriched air or oxygen, into a synthesis gas, and treatment of the synthesis gas with shift reaction and decarbonation, wherein a part of the CO2-depleted synthesis gas, obtained after decarbonation, is separated and used as fuel fraction for one or more furnaces of the conversion section, and the remaining part of the gas is used to produce ammonia.

Abstract: A process for the production of ammonia and urea in an ammonia-urea integrated plant comprising an ammonia section and a tied-in urea section, wherein a hydrocarbon is reformed to produce ammonia make-up synthesis gas; said make-up gas is purified by shift conversion and removal of carbon dioxide; carbon dioxide is removed from the make-up gas by a first and a second CO2 removal sections; the first section removes CO2 by absorption with a suitable medium, and the second section removes CO2 by washing with a carbamate solution taken from the urea section; the make-up gas is reacted to produce ammonia; the CO2 removed from the make-up gas and at least part of the ammonia are used to produce urea.

Abstract: 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° C.

Abstract: 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 (10) to catalytic oxidation, obtaining a gaseous stream containing nitrogen oxides (13); b) subjecting said gaseous stream to a process of absorption of nitrogen oxides, providing nitric acid (16) and a tail gas (17) containing nitrogen and residual nitrogen oxides; c) subjecting at least a portion of said first tail gas (17) to a process of removal of nitrogen oxides, providing a nitrogen oxides-depleted tail gas (18), and comprising a synthesis of ammonia by catalytic conversion of a make-up gas (126, 226) comprising hydrogen and nitrogen in an ammonia synthesis loop, wherein at least a portion (18b, 18d, 21) of said second tail gas is used as nitrogen source for obtaining said make-up gas (126, 226).

Abstract: Process for the synthesis of ammonia comprising the steps of reforming of a hydrocarbon feedstock into a raw product gas, purification of said raw product gas obtaining a make-up synthesis gas, conversion of said synthesis gas into ammonia; said purification includes shift conversion of carbon monoxide into carbon dioxide and the reforming process requires a heat input which is at least partially recovered from at least one of said step of shift conversion, which is carried out with a peak temperature of at least 450° C., and said step of conversion into ammonia.

Abstract: A process for the synthesis of ammonia from a hydrocarbon feedstock, wherein the process includes reforming the hydrocarbon feedstock to produce a make-up gas and converting said make-up gas into ammonia, the process is performed in an ammonia synthesis plant requiring an electric power for operation and also requiring a start-up power (Ps) for start-up, wherein a first electric power (P1) is internally produced in the ammonia plant, and a second electric power (P2) is imported, wherein said second electric power is equal to or greater than said start-up power (Ps).

Abstract: Method for revamping a refining section of a methanol distillation plant comprising a medium pressure (MP) column a low pressure (LP) column, wherein both said columns comprise at least one bottom boiler, a gaseous stream of distilled methanol withdrawn from the MP column is fed to at least one bottom boiler of the LP column and a liquid solution containing methanol withdrawn from the MP column is fed to the LP column, the method of revamping comprising the installation of a high pressure (HP) column; the installation of a line feeding a gaseous stream of distilled methanol from the HP column to at least one bottom boiler of the MP column and the installation of a bottom line for exporting from the HP column a liquid stream consisting essentially of water.

Abstract: Integrated process for the synthesis of ammonia and nitric acid including: a) production of an ammonia make-up synthesis gas, comprising steam reforming of a hydrocarbon feedstock under provision of steam reforming heat; catalytic conversion of said make-up synthesis gas into ammonia; catalytic oxidation of a stream of ammonia obtaining a process gas; absorption of said process gas with water obtaining nitric acid, wherein at least a portion of the steam reforming heat is recovered from said hot process gas.

Abstract: Process for manufacturing a hydrogen-containing synthesis gas from a natural gas feedstock, comprising the conversion of said natural gas into a raw product gas and purification of said product gas, the process having a heat input provided by combustion of a fuel; said process comprises a step of conversion of a carbonaceous feedstock, and at least a portion of said fuel is a gaseous fuel obtained by said step of conversion of said carbonaceous feedstock.

Abstract: Process for making a hydrogen-containing synthesis gas (105) from a hydrocarbon feedstock (101), 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 (7a, 14), resulting in a stream of a CO2-rich medium (5), and regeneration of said medium with recovery of CO2 absorbed therein, wherein said raw synthesis gas (102) 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° C. during said chemical regeneration.