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Amnis Pura focuses on the purification of hydrogen from decentralised production processes such as ammonia cracking, steam reforming, hydrogen production from waste, methane decomposition and other costumised solutions.

Amnis Pura develops purification systems based on pressure swing adsorption technology, typically known as PSA. The operating principle is the selective adsorption of one or more components of a gas mixture on an adsorbent material packed in several beds. The PSA technique involves two main phenomena: adsorption and desorption. The adsorption step is carried out at high pressure, improving the performance of the process. The desorption step is carried out later by depressurising the bed.


Ammonia cracking technology is a process for producing hydrogen from the conversion of ammonia into hydrogen at high temperatures and pressures between 50-100 bar, requiring a subsequent separation step. Amnis Pura manufactures PSAs with an optimised arrangement that can operate at the same pressure as upstream processes with a negligible pressure drop, producing highly pure hydrogen with efficient hydrogen recovery. No nitrogen, no ammonia, just clear, sustainable green energy.


Steam reforming is a common process for producing hydrogen by reacting hydrocarbons such as natural gas, liquid gas or naphtha with water molecules. The process takes place at temperatures of around 800 °C to 900 °C and at average pressures of 20-30 bar in the presence of a catalyst to produce hydrogen, carbon dioxide and carbon monoxide. Amnis Pura has developed and optimised an adsorbent to remove carbon monoxide, which is the bottleneck in this type of separation. With an optimised multi-layer bed, Amnis Pura is able to meet the purity standards of ISO 14687-2, with a recovery of over 90 %.

Hydrogen production
from waste

Gasification is a viable solution against global warming, promoting the valorisation of waste in a circular economy. It is an industrial process in which carbonaceous raw materials (waste, biomass and heavy oils) are converted into a combustible gas called synthesis gas (CO and H2) and into inert slag or coal. Controlled quantities of an oxidiser are injected into a sealed reactor to generate high temperatures, usually over 800 ºC. Gasification is very demanding in terms of purification due to the large amount of contaminants. In addition, since it is a discontinuous process, Amnis Pura’s PSAs have the cycle synchronised with upstream processes to guarantee high purity levels.


Methane decomposition is the cracking of methane, where only COx-free hydrogen and solid carbon is produced. Due to the strong C-H bonds, the thermal cracking of methane requires temperatures above 1200 °C to obtain a reasonable yield, which can be improved with the use of nickel-based catalysts. This process has the potential to make the rapid transition to a fully decarbonised economy and beyond, which in the case of biomethane will support the removal of CO2 from the atmosphere. Amnis Pura has developed purification solutions to remove methane, carbon dioxide and carbon monoxide, as well as traces of acetylene normally present.


Amnis Pura also provides customised solutions for nitrogen and oxygen generators, as well as carbon monoxide and biogas gas purification. Our solutions and advanced technology are tailored to meet your specific needs for clean and sustainable energy.