– Green Hydrogen as a Fuel – Indian Companies leading the Green Revolution

In spite of being a Rain fed nation, monsoon is not always regular and with vast agricultural land we are always dearth of water not only for agriculture , even we lack potable drinking water, leave apart it’s commercial usage in industries such as mineral water , soft drinks etc and we need water for producing green hydrogen!

India has a vast V shaped coast line and we always have access to unlimited sea water.
desalination of sea water is definitely an option, though expensive at present , but given economies of scale , it could be explored.

Let us look at Electrolyser technology which would carry out the Electrolysis of water- do we need purest form of water ? Answer could be both yes & no.

As of today , we have 3 types of electrolysers (1) the good old Alkaline electrolyser which is 100 years old technology has reached its matured stage. it is cheap , uses less expensive conventional anode cathode technology. It uses highly conc KOH solution, corrodes fast, low life, not safe to use. But today it is still in use due to its simplicity and least expensive .
.Capable of using normal water , even sea water under study…

(2) PEM ( proton exchange membrane also known as polymer exchange membeane) electrolysers with H+ Diffusion, highly expensive due to expensive noble metals platinum, iridium , Ruthenium, High efficient , safe , but it would require the Purest form of water.
This has now reached commercial stage all over the world and Ohium in India has already started its operation.

(3) AEM electrolyser (Anion exchange membrane) OH – diffusion, It is in between both the world of expensive PEM and cheapest alkaline. it does not need expensive noble metals , so less expensive than PEM. AEM requires less expensive cobalt , nickel, fe, mn…needs just pure water may not require RO…
This is at an early stage of commercialisation.

There is another electrolyser called solid oxide which requires very high temp upto 500 degree …so still under R&D.

Technology is evolving very fast…Science is great …and our world is great Indian.talents are great…
IIT Chennai has developed an alkaline electrolyser which can take up raw sea water.
Why not ?.If india can send a rocket and land in South pole of the moon where no one had landed before !
I had seen another research paper where
NASA scientists have also endorsed and submitted a report that -yes Alkaline electrolyser can use sea water for electrolysis to produce hydrogen… it is the way to go…but still have a long way to go from laboratory to commercialisation.