A device and a method produces fertilizer from the exhaust gases of a production system, for example a system for producing cement. The exhaust gases are completely converted such that the exhaust gases are not released into the environment. For this purpose, the exhaust gases are introduced directly into the device from the production system. Exhaust gases such as NO.sub.x and/or SO.sub.2 are first oxidized in the device and then reprocessed into NH.sub.4NO.sub.3 or (NH.sub.4).sub.2SO.sub.4. CO.sub.2 is reprocessed into NH.sub.4HCO.sub.3 in the device while nitrogen is converted into ammonia, and the ammonium, among others, is used to produce NH.sub.4HCO.sub.3 from CO.sub.2.

The disclosure pertains to an ammonium nitrate reactor with a first type static mixer in the mixing zone upstream of the tube bundle and/or a second type static mixer downstream of the tube bundle.

Disclosed is a system for the production of urea ammonium nitrate (UAN), which is particularly suitable for processing relatively small ammonium nitrate waste streams into UAN. The system comprises a concentration for ammonium nitrate, a treatment section which allows recovering and recirculating nitrogen compounds entrained in vapor from the concentration section, and a pH control section allowing to adjust the pH of the processed ammonium nitrate waste stream to the extent necessary.

A method and system are provided for synthesizing nitrogen-containing compounds, including ammonia, urea, amino acids, and ammonium salts, under ambient temperature and pressure conditions without the use of external catalysts or high-energy input. A nitrogen-containing gas and water are introduced into an aqueous solution through a submerged bubble-diffusing component, generating microbubbles that collapse and rupture to form high-energy microenvironments. These environments facilitate in situ molecular dissociation and the formation of reactive nitrogen species, including ammonia as an intermediate. The method supports reaction with co-solutes such as carbon dioxide, organic acids, or inorganic anions to yield target compounds. Optional low-energy augmentationssuch as ultraviolet irradiation, ultrasonic agitation, or shear mixingmay enhance yield and selectivity. The system is compatible with isotopic gas variants and can be configured for batch or continuous-flow operation. Applications include decentralized production of fertilizers and biochemical precursors in agricultural, hydroponic, or laboratory settings.

Disclosed is a method for the integrated production of two different urea products. One is an aqueous urea solution suitable for use in NOx abatement (generally indicated as Diesel Exhaust Fluid DEF). The other is a solution used as a fertilizer, viz. Urea Ammonium Nitrate (UAN). The production of DEF and UAN are integrated as follows: ammonia recovered from the production of urea is used as a feed to the production of ammonium nitrate. At least part of an aqueous urea stream from urea production, is mixed with ammonium nitrate so as to obtain UAN.

The present invention relates generally to an ammonia capture system or method comprising plasma NOx and, more particularly to such system and method for ammonia capture comprising a two-tank NOx absorption system. Furthermore the present invention concerns a system to produce ammonium nitrate in solution or as a solid from atmospheric ammonium.

Disclosed is a system for the production of urea ammonium nitrate (UAN), which is particularly suitable for processing relatively small ammonium nitrate waste streams into UAN. The system comprises a concentration for ammonium nitrate, a treatment section which allows recovering and recirculating nitrogen compounds entrained in vapor from the concentration section, and a pH control section allowing to adjust the pH of the processed ammonium nitrate waste stream to the extent necessary.

The disclosure pertains to an ammonium nitrate reactor with a first type static mixer in the mixing zone upstream of the tube bundle and/or a second type static mixer downstream of the tube bundle.

A method for producing ammonium nitrate includes a nitrogen dioxide recovery step of bringing nitrogen dioxide in a cement exhaust gas into contact with water to obtain an NOx-containing solution, a reduction reaction step of producing ammonia by bringing a reducing catalyst into contact with the NOx-containing solution, an ammonia recovery step of vaporizing the ammonia with a waste heat gas, a solid-liquid separation step of separating a residue after the ammonia recovery into iron hydroxide and an unused residue of NOx, a neutralization step of bringing the separated nitrate/nitrite nitrogen-containing solution and the NOx-containing solution into contact with the ammonia vaporized and recovered to prepare ammonium nitrate, and a catalyst production step in which magnetite used in the reduction reaction step is obtained by reacting iron sulfate with a sodium hydroxide aqueous solution and separating the mixture into solid and liquid, the sodium sulfate aqueous solution in the solid-liquid separation is separated into sodium hydroxide and sulfuric acid by electrodialysis, and the sodium hydroxide is used in a circulatory manner for preparing the magnetite, where the nitrogen dioxide in the cement exhaust gas is treated simply and efficiently while reducing environmental burden.