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Why On Site Gas Generation

ON-SITE Gas Generation Vs MERCHANT Gas Supply

The majority of the world’s industrial nitrogen and oxygen is created through large scale cryogenic separation at an Air Separation Unit (ASU). The product gases that ASU produce is normally sold to end users as a liquid at nearly -200°C and stored in thermally insulated vessels or it is evaporated to a gas and compressed at pressures up to 200 bar into steel cylinders.

Another method of supplying industrial nitrogen is with an on-site nitrogen gas generator. A gas generator carries several benefits over traditional supplies including safety, convenience and cost saving

On-Site Gas Generation Supply

Nitrogen generators utilize proprietary selective permeation membrane and pressure swing adsorption (PSA) technologies to produce high purity nitrogen from compressed air. Nitrogen generators are designed to continually transform standard compressed air into nitrogen as safe, regulated pressures without operator attention. An on-site N2 generator will eliminate all of the above problems and increase profitability, reliability and sustainability.

Advantages of On-Site Gas Generation

On-site gas generation offers a unique design and advanced energy-saving technology that requires less compressed air to generate more nitrogen. Substantially lower servicing costs, reduced downtime, and longer working life make it the most cost-efficient nitrogen supply available. Additional benefits include:

  • Take full control of your manufacturing gas supply.
  • Increase your profitability by eliminating the need to purchase over-priced nitrogen from the traditional sources.
  • No more contract
  • No delivery charges and rental cost for liquid bulk tank and cylinders
  • No more hidden cost
  • No more expensive per unit gas pricing

Key Benefits

Exception ROI

A well designed system can offer a payback period of 10 - 24 months and 50- 80% reduction in annual nitrogen expense is possible

Enhanced Safety

Remove the dangerous tasks of handling 200 bar high-pressure gas cylinders and working with extremely low temperature -196°C of liquid nitrogen

Unmatched Pricing

Merchant Gas Supply vs On-site Nitrogen Gas Supply

Gas Cylinder $2.00 – $5.00 per m3

Dewar / PLC $1.00 – $2.00 per m3

LN2 Bulk Tank $0.30 – $1.00 per m3

Gas Generator $0.10 – $0.25 per m3

No Wastage
  • Gas on demand base on end use consumption
  • No evaporation loss – Liquid nitrogen usually 10 – 15% loss each month
  • No unfinished cylinder gas return to merchant gas supplier due to low pressure
Ease of Supply
  • Unlimited and timely supply
  • No longer run out of gas due to miss order for cylinder gas replacement or liquid gas refill
  • No purchasing or accounts payable required to handle paper works, verify quantities or approve invoices
Environmental Impact

Reduce CO2 emissions by eliminating the electrically demanding fractional distillation process and frequent nitrogen deliveries from remote air separation plants

Merchant Gas Supply

Non-Cryogenic High Pressure Cylinders
Cryogenic Dewar / Portable Liquid Container
Cryogenic Liquid Bulk Tank

Disadvantages of Traditional Merchant Gas Supply

One of the main problems, when confronted with a traditional gas supply, is that generally there is no indication on the vessel or cylinder as to how much purity it contains and what flow rate is delivered. Beyond the highly variable costs of industrial gas, supply methods such as cylinders, dewars and bulk liquid storage also create significant challenges for businesses, as well as many additional and hidden costs, which ultimately impact on the bottom line compared to an on-site nitrogen generator.

Added Costs
  • Cylinder or Dewar rental & supply delivery charges
  • Bulk liquid storage planning permission, installation, rental & upkeep
  • Multi-year purchase contract commitments with long notice periods
Logistics & Safety
  • Frequent hazardous truck deliveries to facility
  • High pressure storage, with risk of explosive decompression or leaks
  • Compressed gas cylinders & dewar liquid gas require heavy manual handling
Product Losses & Wastage
  • Unpredictable supply timescales
  • Bulk supply needs frequent switching & monitoring
  • 10% gas returned to supplier & 20% lost to ‘off-gassing’
  • Downtime = lost revenue

An Outstanding Investment That Pay Off

Typical ROI on Gas Generation

An nitrogen generation system can reduce cost by up to 90% when compared to traditional methods of supply. If a company use liquid nitrogen was convert to gas generation technology, the new system could be expected to pay for itself in typical less than 2 years. For a company using cylinders, the payback period could be even earlier which less than 12 months in many cases.