摘要:
Method for the production of ammonia, and optionally urea, from a flue gas effluent from an oxygen-fired, process, wherein the production of ammonia and optionally urea includes a net power production. Also provided is a method to effect cooling in an oxygen-fired process with air separation unit exit gases utilizing either closed or open cooling loop cycles.
摘要:
A process for ammonia -urea production where: liquid ammonia produced in an ammonia section is fed to a urea section directly at the ammonia synthesis pressure, and where the liquid ammonia is purified at high pressure with the steps of: cooling the liquid ammonia (20) obtaining a cooled liquid ammonia stream (21), separating a gaseous fraction (22) comprising hydrogen and nitrogen from said cooled liquid ammonia, obtaining purified liquid ammonia (23) at a high pressure, and reheating said purified liquid ammonia (23) after separation of said gaseous fraction, obtaining a reheated purified ammonia (24) having a temperature suitable for feeding to the urea synthesis process. The application also deals with an ammonia -urea plant comprising an ammonia cooler, a liquid-gas separator and an ammonia re-heater and with a method for revamping existing ammonia -urea plants.
摘要:
Process 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, water gas shift and acid gas wash for removal of carbon.
摘要:
An integrated process for the manufacture of olefins and intermediates for the production of ammonia and urea, comprising an FCC reactor, a regenerator, a steam reforming unit, an air-separation unit, an ammonia production unit and a urea production unit, is described. This process makes it possible to minimize CO2 emissions to atmosphere, make use of heavy feedstocks of low added value (AR) for the production of light olefins, in addition to making maximum use of all the flows involved, thus increasing the energy efficiency achieved, all at the same time.
摘要:
Systems and processes for producing one or more products from syngas are provided. A feedstock can be gasified in the presence of an oxidant to provide a syngas comprising carbon dioxide, carbon monoxide, and hydrogen. At least a portion of the syngas can be combusted to provide an exhaust gas. At least a portion of the exhaust gas can be introduced to a channel having one or more reaction zones at least partially disposed therein, wherein the one or more reaction zones are in indirect heat exchange with the exhaust gas, wherein the one or more reaction zones comprises one or more catalyst-containing tubes. A reactant can be reacted in at least one of the one or more reaction zones to provide one or more reactor products.
摘要:
The present invention enables the coproduction of methanol and ammonia by using a remarkably smaller amount of raw material, natural gas, as compared with the case of independently producing either of methanol or ammonia. Specifically, the present invention provides a process of coproducing methanol and ammonia by using natural gas, LPG, butane, or naphtha as raw material, having a methanol production process (A) composed of specific steps and an ammonia production process (B) also composed of specific steps, in which (1) directing a gas rich in hydrogen recovered in a hydrogen recoverying step in the methanol production process (A) to a certain step after an air reforming step and before a ammonia synthesis step in the ammonia production process (B) to prepare additional feedstock gas for ammonia synthesis; and also (2) cooling a synthesis gas, formed in a steam reforming step in the methanol production process (A) and separating and removing condensed water from the cooled synthesis gas, mixing the water removed synthesis gas and carbon dioxide obtained by pre-compressing carbon dioxide obtained in a CO2 removing step in the ammonia production process (B), compressing up to the methanol synthesis pressure to be supplied as reactant gas for methanol synthesis to the methanol synthesis step (A-2).
摘要:
A process for urea production comprises a first process step in which ammonia (7) and carbon dioxide (6) are obtained, subjecting natural gas (1) to reforming treatments (12, 14), and a second step of urea (8a) production from such ammonia (7) and from carbon dioxide, through a formation of a solution comprising urea and ammonium carbamate in a urea synthesis reactor (20) and a subsequent decomposition of the ammonium carbamate and. urea recovery, the process comprises the steps of:—treating combustion smokes (5) comprising carbon dioxide with an aqueous solution (9a) comprising a part (7b) of such ammonia (7), obtaining an aqueous ammonium carbamate solution (9c);—supplying the solution (9c) thus obtained to the second process step.
摘要:
Disclosed is a method for the production of urea from natural gas, wherein a) natural gas undergoes partial oxidation or autothermal reformation with a gas containing oxygen in a first step and the raw synthesis gas thus arising, consisting essentially of carbon monoxide, carbon dioxide, methane and hydrogen, can be transformed by catalytic conversion of CO and H2O to form CO2 and H2, whereupon carbon monoxide and methane are removed in a multistep gas cleaning process and the hydrogen is converted into ammonia upon addition of nitrogen, and subsequently, b) the ammonia is recombined with the previously separated carbon dioxide in a second step and the ammonia is thus fully converted into urea.
摘要翻译:公开了一种用于从天然气生产尿素的方法,其中a)天然气在第一步中用含氧气体进行部分氧化或自热重整,由此产生的原始合成气基本上由一氧化碳,二氧化碳, 甲烷和氢气可以通过CO和H 2 O 2的催化转化而转化成CO 2 H 2和H 2 O,从而一氧化碳和甲烷 在多步骤气体清洗过程中被除去,并且在加入氮气时将氢气转化成氨,随后b)在第二步骤中氨与先前分离的二氧化碳重新组合,因此氨完全转化为尿素。
摘要:
A gasification plant and methods for producing ammonia, Fischer-Tropsch fuels, electrical power, and/or sulfur from carbon-bearing feedstocks including coal and/or petroleum coke. Methods for production of desired relative amounts of ammonia and Fischer-Tropsch liquid hydrocarbons by adjusting the amount of synthesis gas bypassing the Fischer-Tropsch reactor. The multi-product and integrated plants may be used to reduce the amount of CO2 vented into the atmosphere during the production of these products.