Nitrogen Gas Generator Working Principle

Imagine having a device at your disposal that can generate nitrogen gas anytime you need it. A nitrogen gas generator accomplishes just that. And how does it operate? Learn about the fundamentals of nitrogen gas generation in this blog, from the generator’s essential parts to the science driving the procedure. You’ve come to the correct site if you’ve ever been curious in how these generators work or are thinking about buying one for yourself. So let’s investigate nitrogen gas generators and learn how they change air into pure nitrogen invisibly.

Background Information

Nitrogen gas, which is found everywhere, makes up around 80% of the air you breathe. For usage in industrial applications, getting it from the environment is more challenging. Industries use pure nitrogen for a number of purposes, including food preservation and manufacturing. Nitrogen is typically delivered to the area of use from large-scale facilities, frequently in gigantic cylinders.

On-site nitrogen production, however, is a better strategy. On-site nitrogen gas generators can be used by industries to produce high-purity nitrogen on their own. It is typically more affordable, more practical, and more efficient than the earlier methods. So how do these nifty gadgets work? Let’s investigate the fascinating processes that underlie nitrogen gas producers.

Main Components of a Nitrogen Gas Generator

Here are the main components of a nitrogen gas generator:

  • Compressed Air Source: Delivers the raw air required for nitrogen production.
  • Air Dryer: Removes moisture from the compressed air, ensuring it’s dry.
  • Prefilters: Get rid of contaminants and protect the downstream components.
  • Oxygen Removal System: Separates nitrogen from other gases. This can be a PSA unit or a membrane separator.
  • Carbon Molecular Sieve: Used in PSA units, it adsorbs oxygen, carbon dioxide, and other impurities.
  • Nitrogen Receiver Tank: Stores the produced nitrogen gas, ready for use.

You see, these components work together to give you pure nitrogen. First, the compressed air source provides the air. Then, the air dryer and prefilters clean it. The oxygen removal system, usually a PSA unit or a membrane separator, does the heavy lifting – separating the nitrogen from other gases.

If a PSA unit is used, a carbon molecular sieve helps out, grabbing onto oxygen and other impurities. Finally, all that freshly made nitrogen goes into the nitrogen receiver tank, where it’s stored until you need it. Simple as that! Now you have a clearer picture of what goes on inside a nitrogen gas generator.

Working Principle

If you’re wondering how a nitrogen gas generator operates, it all revolves around extracting nitrogen from other airborne elements. Although it may sound complicated, the underlying ideas are simple. Let me explain the two main methods – Pressure Swing Adsorption (PSA) and Membrane Separation. Now you can choose one.

Picture yourself blowing up a balloon. You use the air around you, which contains about 78% nitrogen and 21% oxygen. A nitrogen gas generator uses this same air but has the unique ability to extract the nitrogen.

Pressure Swing Absorption (PSA)

First, let’s talk about the PSA method. You’ve probably heard of adsorption – it’s a process where gas molecules cling to a solid surface. In a PSA generator, there are two chambers filled with adsorbent material, usually activated carbon or zeolite. When air enters the chambers, the adsorbent material grabs onto the oxygen, carbon dioxide, and other trace gases, leaving behind almost pure nitrogen. Then comes the swing in PSA. Every few minutes, the system switches the chamber it uses. While one chamber fills with air, the other releases the trapped gases back into the atmosphere. It’s like a relay race that ensures a constant flow of nitrogen.

Membrane Separation

Let’s now discuss the membrane separation technique. Imagine a super-fine filter that only allows certain things to pass through. In a nitrogen gas generator, this filter is a semi-permeable membrane. When you push air through this membrane, the smaller oxygen molecules move through faster than the larger nitrogen molecules. What you get on the other side is a stream of gas with a higher concentration of nitrogen. By adjusting factors like pressure and flow rate, you can get the desired purity of nitrogen.

Both methods have their own advantages and are suited for different applications. The PSA method is great for high purity levels, while Membrane Separation is often chosen for its simplicity and lower energy consumption. So, if you’re considering a nitrogen gas generator for your business, understanding these principles will help you make the right choice.


It is crucial to comprehend how nitrogen gas generators operate, to sum up. If you work in the industry or are simply interested, knowing how these gadgets function is really beneficial. Membrane Separation and Pressure Swing Adsorption are the main two ways they work. Amazingly effectively, both procedures generate nitrogen gas for a multitude of uses. Additionally, nitrogen is created precisely where it is needed, saving you time and money. A solid study of these generators will equip you to explore the world of nitrogen gas generators and make informed choices.

Leave a Comment