Casale Sa

Sergio Panza

Ermanno Filippi

Pierdomenico Biasi

Francesco Baratto

Raffaele Ostuni

Pietro Moreo

Maddalena Lepri

Costantino Bruni

Davide Carrara

Maurizio Rizzi

Elio Strepparola

Luca Pasco

Giovanni Luigi Capetti

Leonardo Angelo Galimberti

Reactor for catalytic chemical reactions comprising a catalyst bed with an annular-cylindrical form crossed by a radial flow or mixed axial-radial flow, wherein the bed is delimited by cylindrical walls made gas-permeable by means of slits and the catalyst bed is formed by particles of catalyst with a nominal minimum size such that: the ratio between a transverse dimension of the slits and the nominal minimum size of the particles of catalyst is smaller than or equal to 0.6; the catalyst bed contains no more than 3% by weight of particles with an actual size smaller than said nominal size.

Radial or axial-radial chemical reactor with a fine catalyst

A multi-bed catalytic converter comprising: a plurality of catalytic beds which are traversed in series by a process gas, sequentially from a first catalytic bed to a last catalytic bed of said plurality, and at least one inter-bed heat exchanger () positioned between a first catalytic bed and a second catalytic bed of said plurality, wherein at least the last catalytic bed of said plurality is adiabatic and is made of fine catalyst with a particle size not greater than 2 mm.

Multi-bed catalytic converter

A dual pressure process for the synthesis of ammonia from a make-up gas, wherein the make-up gas is reacted in two steps in series, the second step operating at a greater pressure than the first step, and wherein a portion of the effluent of the first step is recycled back to the first step, said portion containing unreacted make-up gas.

Process for the synthesis of ammonia

A multi-bed catalytic converter comprising at least a first catalytic bed, a second catalytic bed and a heat exchanger arranged between said first bed and said second bed, wherein said heat exchanger is arranged to transfer heat from the hot effluent of the first bed to a cooling medium; said heat exchanger comprises a plurality of stacked round plates, wherein adjacent plates define gaps therebetween, and the effluent of the first catalytic bed and the cooling medium are respectively fed into alternate gaps.

Multi-bed catalytic converter with inter-bed cooling

A method for revamping a CO2 removal section for removing carbon dioxide from a hydrogen-containing synthesis gas, wherein the CO2 removal section comprises an absorption section () wherein carbon dioxide is transferred to an absorbing solution and a stripping tower () for regeneration of the CO2-loaded solution, said stripping tower comprising an upper zone () where a first gaseous CO2 stream () and a partially regenerated semi-lean solution () are produced, and a lower zone () acting as a stripping zone where a second gaseous CO2 stream () and a lean regenerated solution are produced, the second CO2 stream () being a substantially pure stream containing less hydrogen and impurities than the first CO2 stream, and wherein the method of revamping provides the installation of sealing means () inside the stripping tower (), arranged to isolate said second gaseous CO2 stream () from the first stream (), so that the second stream () can be exported separately.

Method for revamping a CO2 removal section for purification of a hydrogen-containing gas

A method for revamping an ammonia plant including a steam system, said steam system comprising at least a high-pressure section operating at a first pressure and a medium-pressure section operating at a second pressure lower than said first pressure, the revamping including: the provision of at least one additional heat recovery by means of a steam flow at a third pressure which is intermediate between said first and second pressure, and the provision of a steam export line arranged to export outside the ammonia plant at least a portion of said steam flow at said third pressure.

Method for revamping an ammonia plant

A method for treatment of process condensate () in an ammonia plant, wherein the ammonia plant comprises a front-end section producing a make-up gas and a synthesis section where the make-up gas is reacted to ammonia, and said process condensate () is collected from one or more equipment of the ammonia plant and is an aqueous solution comprising ammonia, carbon dioxide and methanol. Said method comprises: stripping said process condensate with low-pressure steam (), obtaining a vapour phase () comprising ammonia, carbon dioxide and methanol stripped from the process condensate; condensing said vapour phase, obtaining a solution () enriched of ammonia and methanol; re-introducing a first portion () of said solution to said stripping environment; recycling a second portion () of said solution to said ammonia plant.

Method for increasing the capacity of an ammonia plant

A process for producing ammonia synthesis gas from a hydrocarbon-containing feedstock, with steps of primary reforming, secondary reforming with an oxidant stream, and further treatment of the synthesis gas including shift, removal of carbon dioxide and methanation, wherein the synthesis gas delivered by secondary reforming is subject to a medium-temperature shift (MTS) at a temperature between 200 and 350&#xb0; C., and primary reforming is operated with a steam-to-carbon ratio lower than 2. A corresponding method for revamping an ammonia plant is disclosed, where an existing HTS reactor is modified to operate at medium temperature, or replaced with a new MTS reactor, and the steam-to-carbon ratio in the primary reformer is lowered to a value in the range 1-5&#x2212;2, thus reducing inert steam in the flow rate trough the equipments of the front-end.

Process for producing ammonia synthesis gas

A process and a plant for producing ammonia, where an ASU () delivers an oxygen stream and a nitrogen stream; the oxygen stream () is fed to the secondary reformer of a front-end reforming section (); the nitrogen stream () is used to wash a purge gas or tail gas taken from the synthesis loop (), preferably in a cryogenic section; a methane-free and inert-free gas stream is recovered and recycled to the synthesis loop () or at the suction of the main syngas compressor, to recover the hydrogen contained therein. A corresponding method for increasing the capacity of an ammonia plant, by providing the ASU and feeding the oxygen stream to the secondary reformer and the nitrogen stream to a suitable purge gas recovery unit.

Process for revamping an ammonia plant with nitrogen-based washing of a purge stream

A process for producing methanol, where a hydrocarbon feedstock () is reformed and a make-up syngas is reacted in a synthesis loop, obtaining crude methanol which is further treated to obtain high-grade methanol, and where the carbon dioxide dissolved in the crude methanol is recycled to the reforming section in order to adjust the stoichiometric number of the make-up syngas. In a preferred embodiment, a flash gas () separated from the crude methanol () and light ends () coming from distillation are recycled to a compressor () and fed to a primary reformer (); further carbon dioxide can be recycled from the flue gas ().

[object Object]

A process and a plant for producing a makeup synthesis gas () for the synthesis of ammonia where a hydrocarbon feedstock is reformed in a primary reformer () and in an autothermal reformer () in parallel with said primary reformer; nitrogen is furnished by an air separation unit (), and O-enhched air () produced in said air separation unit is fed to the autothermal reformer. A method for the revamping of the front-end of an ammonia plant is also disclosed.

Process and equipment for the production of ammonia make-up syngas with an air separation unit as nitrogen source

A process for selective removal of a gaseous product (P) from a gaseous system comprising said product and other components (R, R), wherein the gaseous system is admitted to a first environment, which is separated from a second environment by a boundary wall, and a permeation membrane () forms at least part of said boundary wall; a spatially non-uniform electric field () is generated between a first electrode or first plurality of electrodes () located in the first environment and a second electrode or second plurality of electrodes () located in the second environment, so that field lines of said non-uniform electric field cross said membrane, and a dielectrophoretic force generated on particles of said gaseous component (P) is at least part of a driving force of the permeation through said membrane, an amount of said product (P) being selectively removed from the first environment and collected in the second environment.

Growing community of inventors

Como, Italy

Sergio Panza