Engineered to outperform the global benchmark
More current than a premium composite separator in the same cell, in a sheet about 2.7 times stronger. Developed at IIT Bombay and manufactured in India for electrolyser makers worldwide.
What you get with Greenprastha
Performance
More hydrogen per stack, or the same output at lower power.
Durability
A stronger sheet for assembly and pressure cycling.
Local value addition
Supports domestic-content requirements for Indian stacks.
Supply security
Rupee pricing, short lead times and safety stock.
Support
Engineers on site within 48 hours.
More current at the same cell voltage
Lower ionic resistance means less power lost in every cell. Use it as more hydrogen from the same stack, or the same hydrogen at lower power.
Room temperature
80 °C
Measured at IIT Bombay against a commercial 500 µm-class reference. Typical values, not a specification.
A sheet that survives the stack
About 2.7× the tensile strength of the commercial reference and a Young's modulus above 600 MPa. Stiffness and strength decide how a separator behaves in assembly, thermal cycling and pressure swings.
- Easier handling and assembly in large-area cells
- Built for pressurised designs and load-following operation
- Long-duration durability validated with you, on your bench
A step beyond fabric diaphragms. Ahead of the premium benchmark.
Alkaline separators fall into two classes. Low-cost polymer fabric diaphragms conduct well but let gases cross. Premium composite separators hold gases apart and set the performance benchmark. Nerva H2Sep 500 is a composite that outperforms that benchmark in the same cell.
| Property | PPS fabric diaphragm | Premium composite separator | Nerva H2Sep 500 |
|---|---|---|---|
| Construction | Woven or needle-felt polymer fabric | Zirconia–polymer composite | Nanomaterial-modified zirconia–polymer composite, 430 ± 30 µm |
| Bubble point (gas separation) | ≈ 0.02 bar † | 2 ± 1 bar | 2.5 ± 1 bar |
| Gas crossover | Significant, from large open pores † | Low | Low; qualitative GC comparison ‡ |
| Cell current at 2.4 V, room temperature | — | ~1.45 A | ~2.00 A (+38%) |
| Cell current at 2.4 V, 80 °C | — | ~2.10 A | ~2.65 A (+26%) |
| Tensile strength | — | ≈ 24 MPa | ≈ 65 MPa (~2.7×) |
| Young's modulus | — | 310 MPa | > 600 MPa |
| Max. operating temperature | — | 110 °C | 100 °C |
‡ Measured at IIT Bombay against a commercial 500 µm-class reference. Typical values, not a specification. Reference values measured on the same rig or taken from the reference manufacturer's published data. † Published literature on PPS fabric separators: Chem. Rev. 124 (2024), “Separators and Membranes for Advanced Alkaline Water Electrolysis”; ACS Omega (2024), “High-Performance Composite Separator with a Porous Bicontinuous Structure for Alkaline Water Electrolysis”. — = not tested by Greenprastha.
Raise the domestic content of every stack
India rewards domestic value addition in electrolysers, and domestic value addition in alkaline separators is close to zero today. Nerva H2Sep 500 lets Indian stack makers raise it without compromising on performance.
Dependable supply, worldwide
Short and predictable
Planned production and documented lead times for every order, in India and for export.
Predictable
Rupee pricing for customers in India removes import duty and currency risk from the bill of materials.
Safety stock
Stock held for qualified customers, to protect your production plan.
On site within 48 hours
Application engineers support qualification, installation and troubleshooting at your facility.
We don't publish prices. Ask us for a quotation for your volumes.
See the difference on your own bench
Start with A4 samples and a test protocol agreed with your engineers.