DatasheetUnder NDA
Nerva H2Sep 500 technical datasheet
Typical properties, polarisation curves, stress–strain data and GC chromatograms, with full test conditions.
Separator · PDF · 2 pp
Resource centre
Datasheets, guides and technical reading
Everything an engineer, quality lead or buyer needs to evaluate Greenprastha products. Technical documents are shared under a simple NDA.
8documents on separators, technology and the company
1 daytypical turnaround for NDA documents
14terms explained in the glossary
Library
Documents
Public documents are sent on request; technical documents are shared under NDA with named recipients.
BrochurePublic
Nerva H2Sep 500 product overview
What the separator is, how it performs against a commercial reference, and how evaluation works.
Separator · PDF · 4 pp
ProtocolUnder NDA
Separator qualification protocol
A proposed cell and short-stack test protocol: polarisation, gas purity, resistance and durability.
Separator · PDF · 6 pp
GuideUnder NDA
Separator handling, storage and installation guide
Storage conditions, cutting, wetting and stack assembly guidance.
Separator · PDF · 4 pp
WhitepaperPublic
Why the separator sets electrolyser economics
How ionic resistance and current density flow through to stack capex and the cost of hydrogen.
Technology · ArticleRead online
WhitepaperPublic
AEM electrolysis: membranes without precious metals
Why AEM combines alkaline's low-cost materials with PEM-like performance, and where the membrane fits.
Technology · ArticleRead online
CertificateUnder NDA
Sample domestic value-addition certificate
The local-content documentation we provide for SIGHT and National Green Hydrogen Mission claims.
Company · PDF · 1 p
BrochurePublic
Greenprastha company profile
Our technology, products, quality system and founders.
Company · PDF · 6 pp
FAQ
Frequently asked questions
Straight answers to the questions engineers and buyers ask us most.
Still have a question?Our application engineers reply within two working days.
01How do I get the Nerva H2Sep 500 datasheet?
Request it from the Products or Contact page. The full datasheet is confidential; we send it to your work email, under an NDA where needed.
02Can I get samples before signing an NDA?
We share the datasheet under NDA first so that we can agree your test protocol. Samples in your sizes then ship in about two weeks.
03Are your performance numbers independently verified?
Our published values are typical lab values measured at IIT Bombay against a commercial reference. We run joint trials on customer benches and independent third-party testing before volume supply.
04Is Nerva H2Sep 500 a drop-in for my stack?
At 430 ± 30 µm it sits in the 500 µm class, so we expect no re-tooling of frames or gaskets. We confirm fit on your cell.
05Do you supply outside India?
Yes. We work with stack makers in India, the Middle East, Europe and beyond, and provide the technical and quality documentation each market needs.
06Do you make electrolysers?
We make the core components inside them: separators today, then electrodes, zero-gap assemblies and AEM membranes, and AEM stacks in development.
07How is my information protected?
Documents are shared with named recipients, and customer data is stored in India. See our Security & trust page.
Glossary
Membrane and electrolyser terms, explained
- AEM electrolysis
- Anion-exchange-membrane electrolysis: combines low-cost alkaline materials with PEM-like performance, without platinum-group metals.
- Alkaline electrolysis
- Water electrolysis in hot concentrated KOH, with a porous separator between the electrodes. The most established electrolyser technology.
- Bubble point
- The gas pressure needed to push through a wetted porous membrane. Higher bubble points mean better separation of hydrogen and oxygen.
- Crossover
- Gas passing through the separator into the wrong compartment; it limits purity and the safe operating window.
- Current density
- Current per unit of electrode area (A/cm²). Higher current density means more hydrogen from the same stack.
- Ionic resistance
- Resistance to ion transport through the separator (Ω·cm²). Lower resistance means lower cell voltage and less power per kilogram of hydrogen.
- KOH
- Potassium hydroxide, the electrolyte in alkaline electrolysers.
- LCOH
- Levelised cost of hydrogen: lifetime cost per kilogram of hydrogen, including capital and energy.
- MEA
- Membrane-electrode assembly: a membrane bonded to electrodes, the core of PEM and AEM cells.
- Polarisation curve
- Cell voltage plotted against current. It shows how efficiently a cell converts power into hydrogen.
- Zero-gap assembly
- Electrodes pressed directly against the separator to minimise the gap and the cell voltage; supplied ready to stack.
- Green hydrogen
- Hydrogen produced by splitting water with renewable electricity, with no carbon emissions in production.
- Separator
- The porous sheet between electrodes in an alkaline electrolyser that conducts ions and keeps hydrogen and oxygen apart.
- SIGHT
- India's Strategic Interventions for Green Hydrogen Transition programme, which incentivises electrolyser manufacturing.
Need something specific?
Ask for test data at your operating conditions, a quality plan or a supplier questionnaire.