摘要:
A process and a related equipment for making ammonia make-up synthesis gas are disclosed, where: a hydrocarbon feedstock is reformed obtaining a raw ammonia make-up syngas stream; said raw syngas is purified in a cryogenic purification section refrigerated by a nitrogen-rich stream produced in an air separation unit; the nitrogen-rich stream at output of said cryogenic section is further used for adjusting the hydrogen/nitrogen ratio of the purified make-up syngas; an oxygen-rich stream is also produced in said air separation unit and is fed to the reforming section.
摘要:
A process and a plant for producing ammonia, where an ASU (3) delivers an oxygen stream and a nitrogen stream; the oxygen stream (9) is fed to the secondary reformer of a front-end reforming section (1); the nitrogen stream (10) is used to wash a purge gas or tail gas taken from the synthesis loop (2), preferably in a cryogenic section; a methane-free and inert-free gas stream is recovered and recycled to the synthesis loop (2) 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.
摘要:
In a process for the use of a hydrocarbon feedstock (10) by reacting the feedstock in a reactor (11) with oxygen (9) to form a synthesis gas containing at least carbon monoxide, carbon dioxide and hydrogen and subjecting the synthesis gas to a conversion process comprising an exothermic reaction to produce methanol as a final product in a converter (15), the converter operating at an operating pressure, said oxygen being provided to the reactor at an oxygen pressure, the synthesis gas is produced at a pressure such that it undergoes at most one compression step with a compression ratio ranging from 1 to 1.7 before entering the converter.
摘要:
A method of conducting a process involving the generation of steam (24; 58; 104; 170; 198; 222; 259) in which a hot process stream (16; 'A'; 92; 152; 184; 204; 246) is generated. The hot process stream (16; 'A'; 92; 152; 184; 204; 246) can be generated in any manner and can include a burner section of a steam methane reformer (2), a gas turbine of an integrated combined cycle (3), a combustion chamber used to pre-heat incoming air and oxygen for a blast furnace (140), an oxygen transport membrane system (180), and a gas turbine (202) or natural gas engine that is provided to compress air in a cryogenic air separation unit (228; 240).
摘要:
The present invention comprises a method for production of a CO2-rich gas stream and a H2-rich gas stream, the method comprising the following steps: a) natural gas and water are fed to a reforming reactor and are converted to synthesis gas under supply of a O2-containing gas: b) the gas stream from a) is shifted, whereby the content of CO is reduced and the amounts of CO2 and H2 are increased by reaction of H2O; c) the gas stream from b) is separated in a separation unit into a CO2-rich and a H2-rich gas stream, respectively. The invention also concerns the use of a CO2-rich gas stream for injection into marine formations, and the use of a H2-rich gas stream for hydrogenation, as a source of energy/fuel in fuel cells or for production of electricity.
摘要:
A back-up quantity of a "first" gas is supplied temporarily to maintain the level of production of the first gas from a cryogenic separation of a gaseous mixture comprising the first gas and at least one other gas in the event of reduction in the level of production of said first gas from the separation. The separation comprises separating the mixture, or a mixture derived therefrom, in at least one cryogenic distillation system to produce liquefied first gas, the or each system retaining a portion of said liquefied first gas as inventory and vaporising a further portion of said liquefied first gas by indirect heat exchange against a process stream in at least one heat exchanger to produce said first gas. In the event of reduction in the level of production of said first gas from the separation, liquefied first gas inventory is withdrawn from the or at least one of said cryogenic distillation systems and vaporised to produce said back-up quantity of first gas. The invention has particular application to the production of gaseous oxygen ("GOX") from the separation of air.
摘要:
A first process stream of the air separation is compressed in a first compressor (2). The first compressor (2) is mechanically coupled (4) to a steam turbine (1) and to an electric motor (3).