Environmental Impact: On-Site Nitrogen Generation vs. Delivered Nitrogen

As businesses look for ways to reduce their carbon footprint and operate more sustainably, the choice of how you source industrial gases matters. Nitrogen is essential across industries—food packaging, electronics manufacturing, pharmaceuticals, and more—but how you get your nitrogen can make a significant environmental difference.

Here’s a closer look at the environmental impact of on-site nitrogen generation compared to delivered nitrogen, and why producing your own nitrogen often proves to be the greener choice.

Understanding the Two Options

Traditionally, companies have relied on delivered nitrogen—either in high-pressure cylinders or as nitrogen transported in large tanks. While this approach may seem convenient, it involves energy-intensive production at off-site plants and significant transportation to get the gas to your facility.

By contrast, an on-site nitrogen generation system produces nitrogen directly from ambient air using membrane or PSA (Pressure Swing Adsorption) technology. Instead of relying on repeated deliveries, you generate only the nitrogen you need, exactly when you need it.

Lower Carbon Footprint from Reduced Transportation

One of the biggest environmental advantages of on-site generation is the dramatic reduction in transportation emissions. Delivered nitrogen requires frequent truck deliveries to your facility—sometimes multiple times per week—each trip burning fuel and producing greenhouse gases. On-site systems eliminate these recurring deliveries. Fewer trucks on the road mean lower CO₂ emissions and less wear on local infrastructure.

Energy Efficiency and Reduced Waste

Large plants that produce nitrogen consume vast amounts of energy to generate nitrogen gases. Every liter of nitrogen delivered to your site represents a significant upfront energy cost. On-site nitrogen generators, especially modern PSA and membrane systems, typically use only the energy needed to compress and separate the air. This localized process is far less energy-intensive overall.

Additionally, delivered nitrogen often involves partial cylinder returns or product loss from venting, which wastes both nitrogen and the energy used to produce it. Generating nitrogen on-site produces only what you use, helping eliminate unnecessary waste.

Smaller Environmental Footprint from Packaging and Handling

Delivered nitrogen requires cylinders, pallets, protective wrapping, and other packaging materials—many of which have limited reuse cycles and eventually end up as waste. With an on-site nitrogen generation system, these materials are no longer part of your supply chain. That translates to less landfill waste and fewer resources consumed in manufacturing and recycling cylinders or tanks.

Improved Sustainability for Your Operations

For companies pursuing sustainability goals or environmental certifications, reducing your nitrogen supply chain footprint can make a measurable difference. On-site nitrogen generation supports greener operations by minimizing fuel use, cutting greenhouse gas emissions, and lowering the embodied energy in every cubic foot of nitrogen you consume.

Long-Term Cost and Environmental Benefits

Beyond environmental gains, on-site nitrogen generation typically lowers operating costs over time. By eliminating recurring delivery fees, rental charges, and cylinder management, your company can reduce expenses while advancing its sustainability commitments. The investment in an on-site generator pays off both financially and environmentally.

Contact On Site Gas Systems Today for Your N₂ Generator Needs!

Ready to reduce your environmental impact while ensuring a consistent, high-purity nitrogen supply? Contact On Site Gas Systems today to explore on-site nitrogen generation solutions tailored to your operations. Our team can help you design and install a system that supports your sustainability goals and provides a dependable, cost-effective nitrogen source for years to come.

What Is a Nitrogen Generation System and How Does It Work?

Across many industrial, manufacturing, food, and research applications, a nitrogen generation system is a backbone utility: it delivers a continuous supply of nitrogen gas exactly on-site, on-demand. Whether you’re preserving freshness in packaging, maintaining inert atmospheres for welding or brazing, or ensuring safety in oxygen-sensitive processes, using an in-house nitrogen generation system can offer reliability and cost savings that bottled or delivered gas often cannot match.

In this article, we’ll explain what a nitrogen generation system is, explore how nitrogen generation systems work, and show you the main types and benefits of installing one.

What Is a Nitrogen Generation System?

A nitrogen generation system (also called a nitrogen generator) is a setup that extracts nitrogen gas from the ambient air, purifies it to a required purity level, and delivers it for use in-house. Instead of ordering nitrogen in cylinders or bulk deliveries, the system makes nitrogen continuously at your facility, customized to your usage rate and purity needs.

Key components typically include a source of compressed air, filters and dryers to remove moisture, particulates, and oil, the separation module where nitrogen is isolated, and controls, safety features, and sometimes storage or buffer tanks.

How Does a Nitrogen Generator Work?

There are multiple technologies for separation, and each nitrogen generation system might use one or more different methods depending on required purity, flow rate, pressure, and cost. Two of the most common technologies are PSA (Pressure Swing Adsorption) and membrane separation.

PSA systems pass compressed air through vessels filled with an adsorbent like carbon molecular sieve. Oxygen, along with CO₂ and water vapor, is adsorbed under high pressure while nitrogen passes through. The pressure is then released so the adsorbent regenerates, and the cycle alternates between two or more vessels to provide continuous output. PSA can deliver very high purity levels, often exceeding 99%.

Membrane systems push compressed air through a membrane that allows oxygen and water vapor to pass through faster than nitrogen. The slower nitrogen flow is collected as product gas. While membrane systems typically achieve 95–99% purity, this is often sufficient for many industrial applications.

Here is a step-by-step summary of how a typical PSA nitrogen generation system works:

  1. Air intake & compression – Ambient air is drawn in and compressed to a target pressure.
  2. Pre-treatment – Filtration, drying, and cooling remove moisture, oil, dust, and CO₂.
  3. Adsorption – Cleaned, compressed air enters a vessel filled with carbon molecular sieve. Oxygen and other unwanted components are captured while nitrogen passes through as the product.
  4. Switching / Desorption – Once the adsorbent becomes saturated with oxygen, the system directs air to another vessel while the saturated vessel regenerates by reducing pressure, releasing the oxygen.
  5. Purity control & buffering – Sensors monitor nitrogen purity, and buffer tanks or storage smooth out fluctuations in demand.
  6. Delivery – Purified nitrogen is delivered to the point of use or stored if needed.

Types of Nitrogen Generation Systems

Different configurations suit different needs. Options include turnkey PSA generator systems, membrane nitrogen generators for lower-purity applications, custom engineered systems for unique requirements, containerized or modular systems for portable operations, and cylinder-filling systems for facilities that want to fill their own nitrogen cylinders.

Why Choose a Nitrogen Generation System?

Key benefits include cost savings compared to bottled or bulk nitrogen, supply reliability with independence from delivery schedules, the ability to set and maintain exact purity levels, and operational flexibility to match changing demand. Additional advantages include fewer safety and handling risks and a reduced environmental footprint thanks to less transportation and packaging waste.

Contact On Site Gas Systems For Your Nitrogen Gas Needs!

Ready to bring the benefits of on-site nitrogen generation to your operation? Contact On Site Gas Systems today to discuss your specific N₂ generator needs. Our team will help you evaluate your nitrogen requirements, recommend the right system for your application, and guide you through every step—from design and installation to ongoing support—so you can enjoy a reliable, cost-effective supply of high-purity nitrogen on demand.