0
฿0.00
An empty cart
You have no item in your shopping cart
Product Category · Chemical & Petrochemical
Nitrogen & Oxygen Gas GeneratorsOnsite Gas Generation for Process Plants
Nitrogen and oxygen are essential for many chemical and petrochemical processes, including inerting, purging, blanketing, and oxidation. Domnick Thailand provides on-site gas generation systems that produce high-purity nitrogen and oxygen on demand, helping improve supply reliability, enhance operational safety, and reduce long-term gas supply costs across industrial facilities.
✓ PSA & Membrane Nitrogen Technology ✓ PSA & VPSA Oxygen Technology ✓ Purity to 99.999% ✓ Up to 90% Lower Gas Cost
Onsite Gas Generation Circuit Overview
GAS GENERATION SPECIFICATIONS
Nitrogen TechnologyPSA and membrane onsite generation
Oxygen TechnologyPSA and VPSA onsite generation
Purity Range95% to 99.999% depending on application
Supply ModelContinuous onsite, no cylinders required
Cost ReductionUp to 90% versus delivered gas
✓ Air Separation Unit Technology ✓ 24/7 On-Demand Gas Supply ✓ Tank Blanketing, Inerting & Purging Duty ✓ Hazardous Area Options Available
Industry Overview
Why Onsite Gas Generation Replaces Cylinder and Bulk Delivery in Chemical Plants
Chemical and petrochemical facilities consume nitrogen and oxygen continuously, and the traditional model of trucking in cylinders or bulk liquid gas carries real costs beyond the invoice, delivery scheduling risk, storage space, venting losses, and dependency on a third-party supplier's logistics network. A nitrogen gas generator for petrochemical industry use produces gas from compressed air onsite, on demand, eliminating the delivery dependency entirely. The same logic applies to oxygen, an oxygen gas generator for chemical plants removes the need for bulk liquid oxygen tanks and the associated boil-off losses.
Nitrogen's primary role in chemical processing is safety, inerting tank headspace and process vessels displaces oxygen that could otherwise react with volatile or flammable materials, preventing fire and explosion risk. High purity nitrogen for chemical processing also supports purging, sparging dissolved gases out of liquids, and blanketing sensitive feedstock against oxidation. Oxygen serves a different but equally critical role, high purity oxygen for petrochemical applications is used as a reactant in oxidation chemistry, for combustion air enrichment, and to increase aeration efficiency in wastewater treatment systems associated with chemical plants.
Domnick Thailand engineers complete industrial gas generation system infrastructure built around an air separation unit for chemical industry use, matching PSA, membrane, or VPSA technology to the actual purity, flow, and pressure each application demands.
- Nitrogen gas generator for petrochemical industry, PSA and membrane
- Oxygen gas generator for chemical plants, PSA and VPSA
- Onsite nitrogen generation system, tank blanketing and inerting
- Onsite oxygen generation system, oxidation and combustion duty
- Nitrogen supply solution for petrochemical plants, 24/7 supply
- Oxygen supply solution for chemical manufacturing, no cylinders
Two Gases, Two Technologies
How Onsite Nitrogen and Oxygen Generation Work
Nitrogen and oxygen are both separated from compressed air, but each gas uses a different technology matched to its purity and flow requirements.
🔵
Nitrogen Generation
An onsite nitrogen generation system separates nitrogen from compressed air using one of two proven technologies, selected by purity and flow demand.
Membrane Separation95% – 99.5% Purity
Compressed air passes through hollow-fibre membrane modules, oxygen molecules permeate faster than nitrogen, leaving a concentrated nitrogen stream. No moving parts inside the membrane itself keep maintenance low.
Pressure Swing Adsorption (PSA)Up to 99.999% Purity
Compressed air passes through a carbon molecular sieve that adsorbs oxygen, releasing high purity nitrogen. Twin towers alternate between adsorption and regeneration for continuous supply.
🟠
Oxygen Generation
An onsite oxygen generation system uses a mirrored principle, a zeolite molecular sieve captures nitrogen and releases a concentrated oxygen stream.
PSA OxygenUp to 95% Purity
Compressed air passes through a zeolite molecular sieve vessel, nitrogen is captured and a clean stream of oxygen is released. Suited to moderate flow requirements.
VPSA OxygenHigher Flow, Lower Pressure
Blowers and a vacuum pump replace compressed air feed, optimising molecular sieve regeneration for larger volumes at lower operating cost per unit of oxygen produced.
Why It Matters
Matching Gas Purity to the Process Application
Not every application needs the highest available purity, over-specifying purity adds unnecessary cost, while under-specifying it compromises safety or product quality. High purity nitrogen for chemical processing and high purity oxygen for petrochemical applications are each matched to the duty they perform.
95–98%Nitrogen
Tank Blanketing & Headspace Inerting
Displaces oxygen above stored volatile or flammable material to prevent fire and explosion risk
Displaces oxygen above stored volatile or flammable material to prevent fire and explosion risk
99–99.9%Nitrogen
Process Purging & Line Clearing
Displaces ambient oxygen and moisture from vessels and piping before startup or maintenance
Displaces ambient oxygen and moisture from vessels and piping before startup or maintenance
99.9–99.999%Nitrogen
Sparging & Sensitive Reaction Inerting
Removes dissolved gases from liquids and protects oxygen-sensitive reactions and feedstock
Removes dissolved gases from liquids and protects oxygen-sensitive reactions and feedstock
90–95%Oxygen
Combustion Air Enrichment
Raises furnace and kiln efficiency while lowering fuel consumption and emissions
Raises furnace and kiln efficiency while lowering fuel consumption and emissions
90–94%Oxygen
Oxidation Reaction Feedstock
Supplies oxygen as a direct reactant in chemical oxidation processes
Supplies oxygen as a direct reactant in chemical oxidation processes
Applications
Where Chemical and Petrochemical Plants Use Generated Gas
An industrial gas generation system supports a wide range of duties across a chemical or petrochemical facility, each with its own purity and flow signature.
🛢️Nitrogen
Tank Blanketing
Continuous inert blanket over stored volatile or reactive material to prevent oxidation and explosion risk.
🌀Nitrogen
Vessel Purging
Displaces oxygen and moisture from tanks and piping before maintenance, startup, or shutdown.
💧Nitrogen
Liquid Sparging
Injects nitrogen into process liquids to strip dissolved gases and volatiles for product stability.
⚗️Nitrogen
Reaction Inerting
Protects oxygen-sensitive reactions and catalysts from unwanted oxidation during processing.
🔥Oxygen
Combustion Enrichment
Increases furnace and kiln thermal efficiency while reducing fuel use and flue emissions.
🧪Oxygen
Oxidation Reactions
Supplies oxygen as a direct chemical reactant for controlled oxidation processes.
🌊Oxygen
Wastewater Aeration
Raises dissolved oxygen levels in treatment systems, reducing odour and improving efficiency.
🔍Nitrogen
Leak Testing
Nitrogen and helium blends detect leaks in tubing, piping, and pressure assemblies before service.
Why Choose Domnick
Onsite Generation Compared to Delivered Gas
A nitrogen supply solution for petrochemical plants built onsite removes the recurring costs and risks that come with delivered gas.
Cylinder & Bulk Delivery
Ongoing per-unit gas costs that rise with supplier contracts
Delivery scheduling risk and potential supply interruption
Venting losses from bulk liquid boil-off, up to 20% wasted
Storage footprint for cylinders or cryogenic tanks
Long-term dependency on third-party supplier logistics
VS
Domnick Onsite Generation
Up to 90% lower gas cost versus delivered supply
24/7 on-demand production, no delivery dependency
No venting losses, gas produced only as needed
Compact skid or containerised footprint
Independent oxygen supply solution for chemical manufacturing
Selection Considerations
What Determines the Right Gas Generation Technology
Before specifying a nitrogen or oxygen generator, these considerations determine which technology and configuration fits the application.
🎯
Required Purity Level
Tank blanketing at 95–98% nitrogen suits membrane technology, while sensitive reaction inerting above 99.9% typically requires PSA with a carbon molecular sieve.
📊
Flow Rate & Pressure
Low to moderate flow favours standard PSA oxygen systems, while high-volume, low-pressure oxygen demand is better served by VPSA technology at lower operating cost per unit.
🛡️
Safety & Hazardous Area Classification
Nitrogen inerting is itself a safety system for volatile material storage, generator placement and controls should be specified against the site's hazardous area classification.
💰
Return on Investment Timeline
Facilities switching from delivered gas to onsite generation typically see return on investment within six to twenty-four months, depending on current delivery volume and contract pricing.
🔧
Maintenance & Compressed Air Quality
Both nitrogen and oxygen generators depend on clean, dry compressed air feed, pre-filtration element replacement is the most critical recurring maintenance task for reliable long-term operation.
Standards & Compliance
ISO 9001 Quality ATEX Hazardous Area Option NFPA Inerting Compliant PED Pressure Equipment ISO 14001 Environmental ISO 8573-1 Air Quality DCS/PLC Integration Ready Thailand EEC Industrial Standards
Engineer Your Chemical or Petrochemical Gas Generation System
Tell us your required gas, purity level, and flow demand, our engineers will specify the correct nitrogen gas generator for petrochemical industry use or oxygen gas generator for chemical plants for your facility.
Get expert guidance when you need it. Our support team is here to provide you with the right solutions.
