What does anhydrous ammonia used for?

When it comes to what does the anhydrous ammonia used for, you may think that it can be used to make nitrogen fertilizers and refrigerants. In addition, it is also used in areas you may not have guessed. This article will focus on the applications of anhydrous ammonia.

Anhydrous ammonia is an inorganic compound with the chemical formula NH3. Anhydrous ammonia is common in nature, both on Earth and on the outer planets of the solar system. It is widely used in dilute form, but its concentrated form is corrosive and dangerous. In many countries, it is classified as an extremely hazardous substance, and facilities that produce, store, or use it in large quantities must adhere to strict reporting requirements.

Global industrial production of anhydrous ammonia in 2021 was 235 million tons. Industrial anhydrous ammonia is sold as aqueous ammonia or as pressurized or refrigerated anhydrous ammonia shipped in tankers or cylinders.

Anhydrous ammonia used for fertilizer

Most of the world's anhydrous ammonia is used as fertilizer in its salt, solution or anhydrous form. When applied to soil, it helps increase the yield of crops such as corn and wheat. The annual application of anhydrous ammonia worldwide is 110 million tons. Anhydrous ammonia can be used to produce nitric acid, urea and other chemical fertilizers, and can also be used as a raw material for pesticides.

Anhydrous ammonia used for refrigeration

Anhydrous ammonia is a useful refrigerant due to its vaporizing properties. They were widely used before Chlorofluorocarbons (Freon) became popular. Anhydrous ammonia is widely used in industrial refrigeration applications and hockey rinks due to its high energy efficiency and low cost. Its disadvantages are that it is toxic and requires corrosion-resistant ingredients, limiting its use in homes and small scales. In addition to its use in modern vapor compression refrigeration, it is used in absorption chillers when mixed with hydrogen and water.

Anhydrous ammonia used for aerospace
Anhydrous ammonia coolant is also used in radiators on the International Space Station to regulate internal temperatures and conduct temperature-related experiments. Anhydrous ammonia is also used to make propellant for rockets and missiles.

Anhydrous ammonia used for food

It is used in the food industry as an alkaline agent, yeast nutrient, food coloring diluent, frozen tofu manufacturing agent and solvent. Studies have found that anhydrous ammonia can eliminate more than 99% of zoonotic bacteria in some animal feeds. Anhydrous ammonia is currently used commercially to eliminate microbial contamination of beef and kill E. coli. The USDA considers the process effective and safe based on a study that found the treatment reduced E. coli to standard ranges.

Anhydrous ammonia used for chemical industry, scientific research

It is used in chemical industry, scientific research and other fields for preparing standard gas, standard mixed gas, physical property measurement, nitriding of silicon or silicon oxide, etc. In the inorganic chemical industry, it is used in the manufacture of ammonium salts, nitric acid, hydrogen cyanide, hydrazine, hydroxylamine, thiamine, nitramine, phosphorus amine, urea, etc. In the organic chemistry industry. In the organic chemistry industry, anhydrous ammonia can be reacted with alkyl chlorides or alcohols to prepare alkylamines, such as reacting with 1,2-dichloroethane to prepare ethylenediamine, reacting with adiponitrile to prepare hexamethylenediamine, and reacting with propylene to produce acrylonitrile, etc. It can also be used in the manufacture of morpholine, piperazine, methenamine, picoline, 2-methyl-5-vinylpyridine, etc.

Anhydrous ammonia used for fuel and battery energy

Anhydrous ammonia has been used as a fuel and is a proposed alternative to fossil fuels and hydrogen. Anhydrous ammonia, which is a liquid at its own vapor pressure at ambient temperature and has high volumetric and gravimetric energy density, is considered a suitable carrier for hydrogen and may be cheaper than transporting liquid hydrogen directly. Anhydrous ammonia is easier to store than hydrogen. Anhydrous ammonia is more energy efficient than hydrogen as a fuel and is much less expensive to produce, store and transport than hydrogen that must be kept compressed or as a cryogenic liquid. The raw energy density of anhydrous ammonia is 11.5 MJ/L, about one-third that of diesel.

Anhydrous ammonia can be converted back into hydrogen for powering hydrogen fuel cells or it may be used directly within high-temperature solid oxide direct ammonia fuel cells to provide efficient power sources to provide a highly efficient power source that does not emit greenhouse gases. The conversion of anhydrous ammonia to hydrogen can be achieved through the sodium amide process or the catalytic decomposition of anhydrous ammonia using a solid catalyst.

In summary, anhydrous ammonia is used in a variety of fields, from fertilizers we are familiar with to fuels in the aerospace industry. I believe that through this article, readers can have a broader understanding of this substance.