Production of ammonia synthesis gas - …

With over 60 years of experience designing and constructing ammonia other synthesis gas plants, Linde recognizes the challenges producers face in a competitive environment, offering a flexible solution with the Linde Ammonia Concept (LAC™). We cover every phase of the project – from development, feasibility studies, engineering, procurement, construction, commissioning, startup and ongoing operational support and maintenance.


Production of ammonia synthesis gas Abstract

Production of ammonia synthesis gas - Google Books

Nitrogen is economically recovered from the flue gas evolved in a hydrocarbon steam reforming furnace by hydrogenation of free oxygen therein and removal of carbon dioxide and other minor impurities from the flue gas by pressure swing adsorption with recovery of high purity nitrogen is unsorbed effluent. The process is utilized to highest advantage in the production of ammonia syngas wherein natural gas or other hydrocarbon feed is subjected to steam reforming in a fuel-fired furnace. The nitrogen obtained by purification of the flue gas is combined with the purified hydrogen separated from the reformate providing the syngas for conversion to ammonia. In a preferred embodiment, the steam reforming is carried out in two stages, the first stage being performed in a conventional fuel-fired steam reforming furnace to which a major portion of the fresh hydrocarbon feed is charged. The hot effluent from this first reforming stage is employed as the heating medium to support reforming of the remaining minor portion of the fresh feed by heat exchange therewith.

Production of ammonia synthesis gas - Foster Wheeler …

The ways in which hydrogen is obtained from these feedstocks are dealt with separately.This involves two stages:i) the manufacture of synthesis gas (a mixture of carbon monoxide and hydrogen (steam reforming))ii) the removal of the carbon monoxide and production of a mixture of hydrogen and nitrogen (the shift reaction)Whichever way the methane is obtained, it will contain some organic sulfur compounds and hydrogen sulfide, both of which must be removed.

Catalyst for the carbon-free production of hydrogen gas from ammonia----中 国 科 学 院 上 海 硅 酸 盐 研 究 所
A process for removal of excess nitrogen and carbon oxides from a raw synthesis gas used to make ammonia

Unconverted gas is supplemented by …

Because of the low value of the equilibrium constant at high temperatures (e.g., = 0.039 at 800 K), there is no way to produce an equilibrium mixture that contains large proportions of ammonia at high temperatures. We can, however, control the temperature and the pressure while using a catalyst to convert a fraction of the N2 and H2 in the reaction mixture to NH3, as is done in the Haber-Bosch process. This process also makes use of the fact that the product—ammonia—is less volatile than the reactants. Because NH3 is a liquid at room temperature at pressures greater than 10 atm, cooling the reaction mixture causes NH3 to condense from the vapor as liquid ammonia, which is easily separated from unreacted N2 and H2. The unreacted gases are recycled until complete conversion of hydrogen and nitrogen to ammonia is eventually achieved. is a simplified layout of a Haber-Bosch process plant.

13/01/1987 · A process for removal of excess nitrogen and carbon oxides from a raw synthesis gas used to make ammonia. The raw synthesis gas is …

Ammonia production from natural gas. - SlideShare

In the hydrogen plant, the synthesis gas (syngas) is produced through steam reforming, then purified by pressure swing adsorption. High purity nitrogen is delivered from the nitrogen plant and mixed with the syngas upstream of a syngas compressor. With fewer process steps, LACTM is simpler than traditional ammonia generation processes, leading to investment and operational cost savings. Additional cost benefits can be recognized through the sale of valuable by-products from the nitrogen and hydrogen plant such as oxygen, argon and carbon dioxide. LAC plants have been constructed with capacities of between 230 to 1,350 mtd of NH3.

LAC™ (the Linde Ammonia Concept) makes possible the production of ammonia from natural gas or light hydrocarbons

Ammonia Synthesis, a Complex and Nonlinear Process ..

Want to maximize your investment? Linde’s purge gas recovery systems give plant operators an opportunity to realize the financial benefits of removing hydrogen, ammonia, argon and nitrogen from synthesis loop purge gas. These pre-assembled, skid-mounted solutions are bundled for a perfect fit for your new or existing ammonia plant.