The present invention concerns a process for the production of nitric acid according to the Ostwald method, Comprehensive conversion of ammonia with air oxygen (primary air) to a NOx-containing gas stream in an ammonia oxidation reactor (11) at first pressure and absorption of the NOx-containing...
As emission of Nsub2/subO represents a very serious problem due of its huge contribution to global warming, certain measures focused on its maximum reduction should be undertaken. Minimization of Nsub2/subO emission in nitric acid production can be achieved in different parts of the process flow,...
Fig. 1. Main stages of the nitric acid production process. The air used for this process comes from a centrifugal compressor connected to a compression train which delivers oil-free air at a temperature of 184 °C. The ammonia used is 99.8 % ammonia by weight and free of lead, iron, si...
Sepiolite (SEP) produced from Yuezhou city of China, was purified by acidification and calcination. Some raw SEP was added to 5 mol/L nitric acid aqueous solution for 2 h at 60 °C with vigorous stir, then rinsed with deionized water. Whereafter, the purified clay was calcined at ...
The present invention relates to an absorption tower (10) for a plant for the production of nitric acid according to the Ostwald process, comprising a plurality of sieve trays (14) arranged one above the other and spaced apart from one another, an inlet (12) for water in an upper region...
CATALYST FOR REACTING DINITROGEN MONOXIDE AND USE THEREOF IN INDUSTRIAL NITRIC ACID PRODUCTIONIn the oxidation of ammonia according to the Ostwald process as a precursor for the production of fertilizers, dinitrogen monoxide is created as an undesired byproduct that is extremely damaging to the climate...
The technology for the heterogeneous oxidation of ammonia to NO_2, necessary for the synthesis of weak nitric acid (WNA), was first devised by W. Ostwald (Germany) in 1902 and put into industrial practice in 1907. Platinum was suggested as a catalyst for this process [1]. Later on, ...
2.4. Double Immunofluorescence Incubation of Mouse Brainstem Sections For double-immunostaining experiments, sections were incubated in primary Cygb-antibody as described above and, simultaneously, in a polyclonal sheep antibody raised against neuronal nitric oxide-synthase (nNOS, 1:50, Abcam, Cambridge, ...