Hydrogen Generator for Refineries
On-site hydrogen systems for refinery make-up H2, hydrotreating, desulfurization, hydrocracking, biofuel co-processing and hydrogen-rich stream purification. Gastek sizes the package around flow, purity, pressure, dew point, compression, storage, controls and refinery safety requirements.
Sizing Snapshot
Refinery H2
Common duties
Hydrotreating, desulfurization, hydrocracking and refinery hydrogen networks
Make-up H2
Typical quality
Selected from catalyst sensitivity, dew point, contaminants and process role
99.9-99.999%
Sizing basis
Normal use, peak use, buffer storage, compression and network pressure
Flow + pressure
Hydrotreaters
Hydrocrackers
H2 recovery
Existing hydrogen users
Refineries already consume hydrogen for sulfur removal, hydrotreating and upgrading, so the H2 package should be specified from actual process demand, header conditions and catalyst requirements.
Low-carbon substitution
Electrolysis can support green or low-carbon hydrogen substitution when the power source, certification, utilization and integration scope are commercially clear.
Network integration
The buying decision is not only the electrolyser. It includes purification, drying, compression, storage, controls, safety and tie-in to the refinery hydrogen network.
Refinery hydrogen demand is a process-network decision.
A refinery hydrogen system should not be sold from an electrolyser nameplate alone. The package has to fit the refinery unit, catalyst requirements, hydrogen network pressure, buffer storage, safety basis, control interface and whether the project needs new hydrogen generation or purification of an existing hydrogen-rich stream.
Desulfurization
HDS and ultra-low sulfur fuels
Hydrotreating
Naphtha, diesel, kerosene, lube oils
Hydrocracking
Heavy feeds and middle distillates
Make-up Supply
Stable H2 header support
Purification
Hydrogen-rich stream cleanup
Safety Interface
Detection, purge logic, controls
Refinery hydrogen applications that need engineered supply
Hydrotreating, hydrocracking, biofuel co-processing, make-up supply and PSA purification do not have the same flow, pressure or gas-quality profile. Separate the duty before sizing the package.
HDS, HDT and clean-fuel production
Hydrodesulfurization and hydrotreating
Supply hydrogen for sulfur, nitrogen, oxygen and metals removal across refinery streams where catalyst performance, purity and continuous operation matter.
- Diesel and kerosene hydrotreating
- Naphtha pre-treatment
- Ultra-low sulfur fuel support
Sizing cue
Start with H2 consumption, purity, pressure, dew point, sulfur target, catalyst sensitivity and hydrogen header conditions.
Heavy feed upgrading
Hydrocracking make-up hydrogen
Review on-site hydrogen generation for hydrocracking units that need reliable make-up supply to convert heavier feedstocks into lighter products.
- VGO hydrocracking
- Middle distillate yield support
- Lube and specialty hydroprocessing
Sizing cue
Define normal and peak H2 demand, operating pressure, compression scope, buffer storage and tie-in limits.
Header, storage and pressure control
Refinery hydrogen network support
Use electrolysis as a make-up or supplemental source where the refinery wants more control over hydrogen availability, pressure stability or carbon intensity.
- Make-up hydrogen
- Hydrogen header support
- Backup or supplemental generation
Sizing cue
Confirm network pressure, pressure-control philosophy, storage volume, compressor scope and simultaneous users.
Emerging refinery demand
Biofuel and renewable diesel co-processing
Hydrotreating bio-based feedstocks can increase hydrogen intensity. A project review should separate pilot, co-processing and dedicated renewable fuel duties.
- Bio-feed hydrotreating
- Renewable diesel projects
- SAF or specialty hydroprocessing review
Sizing cue
Feedstock variability, oxygen content, catalyst requirements and H2 consumption profile should drive early sizing.
Reformer off-gas and hydrogen-rich streams
Hydrogen purification and recovery
Some refinery projects need purification or recovery before they need new hydrogen production. PSA purification may be relevant for hydrogen-rich streams.
- Hydrogen-rich off-gas cleanup
- PSA hydrogen purification
- Purity polishing and recovery review
Sizing cue
Share stream composition, pressure, flow, impurities, target recovery and required product purity.
Policy, carbon and certification-driven projects
Green hydrogen pilots and substitution
Electrolysis can support low-carbon refinery hydrogen when renewable power, certification, operating hours, battery limits and commercial offtake are defined.
- Pilot electrolyser packages
- Partial grey hydrogen substitution
- Carbon reporting and certification support
Sizing cue
Utilization, electricity source, certification route, metering, and battery limits should be agreed before equipment selection.
Match hydrogen supply to the refinery unit and H2 network.
Refinery projects can over-focus on hydrogen production capacity while under-defining pressure, storage, purity, purification, compression and control scope. A stronger enquiry separates process demand, hydrogen quality, network tie-in and safety requirements.
Practical sizing rule
Start with the refinery unit, not the electrolyser.
Hydrotreating, hydrocracking, biofuel processing, make-up header supply and PSA recovery all need different engineering assumptions.
Safety boundary
Hydrogen safety, hazardous-area classification, venting, interlocks, startup and shutdown sequences, and operating procedures must be finalized with the refinery engineering and safety teams.
Selector table
Refinery H2 Duty by Application
Final specification should be confirmed against catalyst requirements, pressure, flow profile, storage, compression and refinery safety basis.
| Application | Hydrogen Role | Specification Focus |
|---|---|---|
| Hydrodesulfurization and hydrotreating | Reaction hydrogen and make-up supply | Purity, dew point, catalyst contaminants, continuous duty and header pressure |
| Hydrocracking | High-volume make-up hydrogen | Peak flow, compression, storage, unit pressure and reliability philosophy |
| Biofuel co-processing | Higher hydrogen demand for oxygenated feedstocks | Feed variability, H2 consumption, catalyst requirements and pilot-to-scale plans |
| Hydrogen purification | Recover or polish hydrogen-rich streams | Stream composition, PSA duty, recovery, impurity limits and product purity |
| Green hydrogen substitution | Electrolytic H2 blended into refinery consumption | Power source, utilization, certification, metering and battery-limit scope |
What needs to be specified for refinery hydrogen supply
Detailed generator specifications belong in the main hydrogen generator guidance. This section focuses on refinery-specific decisions that affect flow reliability, pressure integration, purification and safety.
Configuration path
Specify the refinery duty before selecting the H2 package.
Map the refinery hydrogen users
Separate hydrotreaters, hydrocrackers, make-up header demand, pilots, backup duty and purification opportunities.
Define gas quality and pressure
Confirm H2 purity, dew point, allowable oxygen, catalyst contaminants, use-point pressure and network pressure.
Calculate normal and peak flow
Use actual unit demand, startup cases, turndown, peak consumption, storage philosophy and operating hours.
Select generation or purification route
Review PEM or alkaline electrolysis for new H2, and PSA purification where a hydrogen-rich stream already exists.
Integrate controls and safety
Define compression, drying, storage, ESD, leak detection, purge logic, DCS/SCADA interface and hazardous-area scope.
H2 generation
Conditioning
Refinery tie-in
Engineering principle
A refinery hydrogen package can include water treatment, PEM or alkaline electrolysis, gas conditioning, purification, compression, storage, metering, ESD, leak detection, venting, purge logic and DCS/SCADA interface. Scope clarity matters as much as nameplate production.
Avoid vague specifications
"Hydrogen for refinery" is not enough information.
The quote should define the process unit, normal and peak flow, gas quality, pressure, compression, storage, control interface, safety scope and whether purification should be evaluated.
View main hydrogen generator specsMake-up H2 is not a generic flow number
Hydrogen demand changes by process unit, crude slate, catalyst condition, product target, startup case and operating severity.
Purity should follow catalyst risk
Catalyst sensitivity, moisture, oxygen, nitrogen and other impurities should drive the gas conditioning package.
Compression and storage are central
Electrolyser outlet pressure rarely tells the full story. Header pressure, buffer volume, booster duty and controls must be designed together.
PSA purification may be the better first question
If the refinery has a hydrogen-rich stream, purification or recovery can be evaluated before adding new hydrogen production.
Review PSA hydrogen purificationHazardous-area scope needs early review
Installation location, instruments, enclosure scope, electrical classification and refinery standards should be clarified before final quotation.
Green hydrogen depends on utilization
Low-carbon hydrogen economics depend on power cost, renewable availability, capacity factor, certification and whether the refinery can consume variable supply.
Quote inputs
What Gastek typically confirms before quoting
Output
The result should be refinery-ready H2 supply.
Common questions before buying a refinery hydrogen generator
Can an on-site hydrogen generator be used in a refinery?
Yes, when the system is engineered around the refinery duty. The important inputs are hydrogen flow, purity, dew point, pressure, storage, compression, safety logic, control interface and the specific process unit being supplied.
Is electrolysis suitable for refinery hydrogen demand?
Electrolysis can fit make-up hydrogen, pilot projects, low-carbon substitution and selected supplemental supply cases. Large continuous refinery loads need a careful review of power cost, capacity factor, storage, compression and integration with the existing hydrogen network.
What is the difference between hydrogen generation and hydrogen purification in refineries?
Hydrogen generation creates new hydrogen from water and electricity. Hydrogen purification recovers or polishes hydrogen from an existing hydrogen-rich stream. A refinery should review both routes if off-gas or reformer-linked streams are available.
What hydrogen purity is required for hydrotreating and desulfurization?
Purity depends on the catalyst, process conditions and impurity limits. Many refinery discussions start around 99.9% to 99.999% H2, but the final target should be set from catalyst sensitivity, moisture limit, oxygen tolerance and plant standards.
What information is needed to quote a refinery hydrogen system?
Share the process unit, H2 flow, purity, dew point, pressure, operating hours, peak demand, storage requirement, compression need, utilities, safety standards, control interface and installation area classification.
Can a hydrogen generator support hydrodesulfurization or hydrotreating?
It can be reviewed for make-up hydrogen, pilot projects, low-carbon substitution or selected supplemental supply. The practical fit depends on H2 flow, purity, pressure, catalyst limits, compression, storage and refinery hydrogen network integration.
When is PSA hydrogen purification better than new hydrogen generation?
PSA purification can be a better first question when the refinery already has a hydrogen-rich stream that can be recovered or polished. New generation is more relevant when additional H2 is needed and the power, water, storage and integration basis is acceptable.
Specify Refinery Hydrogen Around the Actual Unit Demand
Share the refinery unit, H2 flow, purity, pressure, dew point, storage, compression, operating profile, controls and safety scope. Gastek will recommend whether electrolysis, purification or a combined package is the right starting point.