Hydrobooster ALK · Engineered by Knergy.
Robust technology. Proven. Engineered to run 24/7 for decades.
The most proven technology in the sector
Hydrobooster ALK is Knergy's proprietary line of industrial alkaline electrolyzers. Alkaline electrolysis is, by far, the most proven technology for large-scale industrial hydrogen production. With hundreds of installations operating worldwide and decades of validation in heavy industry, it is the logical choice for any process that requires continuous operation, high availability and predictable operating costs.
Hydrobooster ALK takes this mature technology base and integrates it with Knergy's cement and steel application engineering, the balance of plant optimized for severe industrial climates, the Siemens IEC 62061 SIL2/SIL3 functional safety systems, and native integration with the client's COP. The result: the most profitable asset in your plant.
The optimal use case for alkaline electrolysis
Continuous 24/7 operation
Cement plants, steel mills, refineries, chemical plants.
Large scale
Projects from 100 Nm³/h up to multiple MW of production.
Competitive cost per kW
Lower CAPEX per Nm³/h installed vs PEM.
Extended service life
Stacks designed for 80,000–100,000 hours of operation.
No dependence on precious metals
Nickel electrodes, stable supply, predictable costs.
Hydrobooster ALK line
- Purity of H₂ produced
- Up to 99.999% (post-purification)
- H₂ dew point
- −70°C
- Operating load range
- 30% – 110% (wide modulation)
- Stack size
- 25 kW – 15 MW per unit
- Outlet pressure
- Up to 32 bar (no additional compression)
- Specific consumption
- 4.3 – 4.8 kWh/Nm³ of H₂
- Stack service life
- 80,000 – 100,000 hours
- Operating regime
- Continuous 24/7
- Safety system
- Cement/steel HAZOP + Siemens IEC 62061 SIL2/SIL3
- Control integration
- Native integration with the client's DCS/COP
- Delivery format
- Containerized plug & play or on-site installation
Cutaway diagram of a Hydrobooster ALK alkaline stack: treated water inlet, O₂ recovery and H₂ outlet.
Four capacities, plus tailored solutions
Hydrobooster ALK is available in four standardized capacities plus tailored solutions, all under Knergy's in-house engineering.
Compact solution for small kilns, white clinker lines, or an initial pilot phase. Ideal for validating the business case before scaling.
Optimal solution for medium kilns in continuous 24/7 operation. The return-on-investment sweet spot for most industrial plants in LATAM.
Significant thermal substitution in large kilns (> 4,000 TPD for cement, equivalent for other sectors). Reference equipment for clients with aggressive decarbonization targets.
Larger capacities under specific design, up to substituting 5% of the primary fuel. MW-scale green hydrogen plants for DRI-H₂ applications, power generation, refining, or green ammonia/methanol production.
Complete multi-MW Hydrobooster ALK plants
Beyond the standardized modules, Knergy designs and delivers complete Hydrobooster ALK plants at industrial multi-MW scale: integrated balance of plant, storage systems, compression, purification, auxiliary systems (industrial cooling, water management, electrical integration), and functional safety systems.
Individual stacks
From 25 kW up to 15 MW per unit.
Complete plants
Multi-stack configurations from 1 MW up to 100+ MW.
Coupling with renewables
Hybrid designs with solar/wind generation and storage systems.
HAZOP specific to your industry
Every Hydrobooster ALK unit is delivered with a thorough HAZOP analysis specific to the client's industry (cement, steel, chemical, etc.) — not a generic electrolyzer HAZOP. The functional safety system complies with Siemens IEC 62061 (SIL2/SIL3) and the components in classified zones comply with ATEX/IECEx Zone 1 and 2.
Receive the techno-economic assessment of your plant
Individual analysis of your process and sizing of the Hydrobooster ALK for your case. We do not send catalog quotes.