A process for producing hydrocarbons is disclosed in which a first feed substream and a second feed substream are obtained from a hydrocarbonaceous feed stream, of which the first feed substream is converted by means of partial oxidation or autothermal reforming to a first synthesis gas stream and the second feed substream is converted by means of steam reforming to a second synthesis gas stream and subsequently combined with the first synthesis gas stream to give a third synthesis gas stream, of which at least a first portion is converted by Fischer-Tropsch synthesis to a crude product stream comprising hydrocarbons of different chain lengths, from which light hydrocarbons are separated in a tail gas, in order to recycle them and use them in the partial oxidation or autothermal reforming. The characteristic feature here is that unsaturated hydrocarbons are separated from at least a portion of the tail gas.

Method for the preparation of synthesis gas combining electrolysis of carbon dioxide, autothermal reforming and 5 optionally tubular steam reforming of a hydrocarbon feed stock.

A plant for the co-production of methanol and ammonia from a hydrocarbon feed without venting to the atmosphere carbon dioxide captured from the methanol or ammonia synthesis gas and without using expensive air separation units and water gas shift.

A process and plant for the co-production of methanol and ammonia together with urea production from a hydrocarbon feed without venting to the atmosphere carbon dioxide captured from the methanol or ammonia synthesis gas and without using expensive air separation units and water gas shift. Carbon dioxide is removed from flue gas from reforming section and used to convert partially or fully all ammonia into urea.

A chemical looping process for the production of hydrogen and the co-production of carbon dioxide comprising: a first redox loop that comprises: feeding of a first solid oxygen carrier to a first reaction zone (R1) in which a first carbonaceous fuel is also fed, which reacts with the first solid oxygen carrier fed at its maximum oxidising state (fully-oxidised form), leading to the formation of the combustion products carbon dioxide and water and the solid oxygen carrier at a lower oxidising state (reduced form); and feeding of the first solid oxygen carrier in reduced form to a second reaction zone (R2) into which air is also fed, obtaining, from the oxidation of the first solid oxygen carrier, heat and the solid oxygen carrier in fully-oxidised form to be recycled to the first reaction zone (R1); and a second redox loop that comprises: feeding of a second solid oxygen carrier to a third reaction zone (R3) in which a second carbonaceous fuel is also fed, which reacts with the second solid oxygen carrier fed at its an intermediate oxidising state (oxidised form), leading to the formation of the combustion products carbon dioxide and water and the solid oxygen carrier at a lower oxidising state (reduced form); and feeding of the second solid oxygen carrier in reduced form to a fourth reaction zone (R4) into which steam is also fed, which reacts with the reduced form of the solid oxygen carrier, producing hydrogen and the solid oxygen carrier at an intermediate oxidising state (oxidised form) to be recycled to the third reaction zone (R3) and/or the first reaction zone (R1), wherein the first reaction zone (R1) and the third reaction zone (R3) are interconnected allowing transfer of at least a portion of the first solid oxygen carrier from the first reaction zone (R1) to the third reaction zone (R3).

The invention relates to a chemical plant comprising a reforming section arranged to receive a feed gas comprising hydrocarbons and provide a synthesis gas, wherein the reforming section comprises: an electrically heated reforming reactor housing a first catalyst, said electrically heated reforming reactor being arranged for receiving said feed gas and generating a first synthesis gas; and an autothermal reforming reactor downstream said electrically heated reforming reactor, said autothermal reforming reactor housing a second catalyst, said autothermal reforming reactor being arranged for receiving said first synthesis gas and outputting a second synthesis gas, wherein said reforming section is arranged to output said output synthesis gas comprising said second synthesis gas. The invention also relates to a process for producing a chemical product from a feed gas comprising hydrocarbons, in a chemical plant according to the invention.

A gas production system which applies plasma to a catalyst in a reactor and reforms a supplied source gas and a supplied oxidant gas to produce a product gas, includes: gas ratio change means for changing a ratio between the source gas to be supplied to the reactor by source gas supply means and the oxidant gas to be supplied to the reactor by oxidant gas supply means; and plasma generation means for generating the plasma to be applied to the catalyst. Thus, formation of highly reactive chemical species on a catalyst surface is efficiently promoted, whereby the yield of the product gas and energy efficiency are improved.

A process for the co-production of methanol and ammonia is described comprising the steps of: (a) forming a first synthesis gas stream by reacting a first portion of a hydrocarbon feedstock and steam in a steam reformer, (b) forming a second synthesis gas stream in parallel to the first synthesis gas stream by reacting a second portion of the hydrocarbon feedstock with an oxygen-containing gas and steam in an autothermal reformer, (c) synthesising methanol from a first process gas comprising the first synthesis gas stream, and (d) synthesising ammonia from a second process gas prepared from the second synthesis gas stream, wherein a purge stream containing hydrogen is recovered from the methanol synthesis step (c) and a portion of the purge gas stream is fed to the autothermal reformer and/or the second synthesis gas in step (b).

A method for improving efficiency of an existing ammonia synthesis gas plant or a new ammonia synthesis gas plant by establishing a combination of secondary steam reforming using oxygen from electrolysis of water for the production of ammonia synthesis gas.

Method and plant for producing a synthesis gas for use in the production of a hydrocarbon product, particularly a synthetic fuel, comprising: providing a hydrocarbon feed gas, providing a first oxygen rich stream by passing air through an air separation unit (ASU), carrying out autothermal reforming of said hydrocarbon feed gas in an autothermal reforming (ATR) unit, said autothermal reforming including using at least a portion of said first oxygen containing stream, providing at least part of said synthesis gas to a synthetic fuel synthesis unit for converting said synthesis gas into said hydrocarbon product and producing a tail gas, recycling part or the entirety of said tail gas to upstream said ATR, providing a first hydrogen rich stream and a second oxygen rich stream, and adding at least a portion of said first hydrogen rich stream to said synthesis gas prior to entering said synthetic fuel synthesis unit.