Nitrogen production by PSA

The technology of pressure swing adsorption (PSA) allows to supply nitrogen at a purity of up to 6.0 / 1.0 ppm (residual oxygen) by quantity of 0,5 – 10.000 Nm³/h. The PSA technology is based on the separation of nitrogen and oxygen molecules from compressed dry air in an adsorption column filled by carbon molecular sieve (CMS).

Серийная продукция Инматек
Inmatec serial products

The PSA process for nitrogen generation can be divided into two phases: pressurization/adsorption of oxygen and depressurization/desorption of oxygen. In the initial phase, the CMS adsorbs oxygen under high-pressure conditions and pure nitrogen leaves the column outlet as a product gas. In the second phase, the adsorber is depressurized to atmospheric pressure and oxygen molecules release the column. Typical PSA line consists of two adsorption columns, which are alternately charged with compressed air and de-pressurized. Thus the quasi-continuous process of nitrogen generation can be achieved.

Continuous measurement of temperature and pressure of compressed air as well as pressure and purity of nitrogen guarantees the required quality of product. Every PSA column is equipped by INMATEC touch control panel, which displays the measured values and allows operator to control the process directly at the unit or distantly.

3D модель линии КЦА для производства азота под ключ
3D Model of turnkey plant for N₂ production by PSA


Technical Data PSA*

1 Air compressor
Inlet pressure atm.
Inlet temperature 30 °C
Relative Humidity 70 %
Cooling water temperture 27 °C
Outlet pressure 9 bar
Productivity 161,2 Nm³/h
Power consumption 1028 kWh
2 Puffer tanks for wet and dry compressed air
Volume 10.000 l
Max. pressure 11 bar
Filtration of compressed air
Max. temperature 120 °C
Max. pressure 16 bar
Particle removal 0,01 micron
Max. oil carryover at 20°C 0,01 mg/m³
Compressed air dryer
Dew point 3 °C
Refrigerant R407C
Nominal absorbed power 14,23 kWh
6 Buffer tanks before and after N2 generator
Volume 20.000 l
Max. pressure 11 bar
3 N2 generators
Max. pressure of inlet compressed air 10 bar
Purity 99,99%
Productivity 600 Nm³/h
*data based on the nitrogen generator with total nitrogen capacity of 1800 Nm³/h


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BLN Consulting is a multi-industry consulting company, which offers professional support in the realization of diversified projects in Europe, Russian Federation and in the Commonwealth of Independent States.

Our core business lines are:

  • Multimodal transportation of various goods with the use of all kinds of surface, air and maritime transport as well as organization of customs processing
  • Recycling of used oils in the plasma tube reactor 
  • Recovery of wasted solvents via vacuum distillation including fractionation
  • Exhaust air treatment via thermal incineration, regenerative and catalytic oxidation including heat recovery system
  • Nitrogen generation with PSA and cryogenic plants

The primary purpose of the company's business is to help our clients to accomplish their goals with maximum value and at minimum costs. Your main advantages of cooperation with us are our long-term experience in international projects and in delivery of goods in to/out from CIS; innovative approach to the realization of projects and application of most modern methods and technologies; as well as professional consultant team and reliable suppliers of services and technologies.

Moreover, a strategic location of the office in Tallinn – trade center between Central Europe, Scandinavian and Russia in the country with the highest internet penetration rate in the world – is a guarantee of the fastest realization of you projects.

We appreciate your interest in our company and look forward to a continued good cooperation.

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