I enjoy working on Hydrogen energy, energy storage & carbon capture technologies. I have industrial experience to apply the principles of thermodynamics, computational fluid dynamics, electro-chemistry, heat & mass transfer, and system integration over the past 17 years at my own companies.

I have worked on hydrogen production from water, hydrogen fuel cells, gas compression, biogas production, biogas upgrading into bio-methane, capturing Carbon di Oxide from various sources using water scrubbing, and pressure swing absorption methods. I have experience on high pressure storage of hydrogen and bio-natural gas (Bio-CNG). I have studied the super critical fluid properties of CO2 at high pressure.

While developing fuel cell and electrolyser technologies at my own companies I have gained experience on mathematical modelling of fluid flow through very thin channels and fine pores for designing of bipolar plates and electrodes. This helped my understanding of the characteristics of gas bubble movement, capillary action, fluid viscosity and rheology under various temperatures and pressures. I have developed catalyst ink for electrodes using solvent, carbon powder, metal-catalyst, binders etc.

I have two international patents granted on electrolyser for hydrogen production as the sole inventor and owner. 



My first degree was in Civil Engineering with specialisation on Environmental Engineering (1990-1994) from India. I then took my Masters Degree on Energy Engineering from India which gave me an exposure to both conventional and non-conventional energy systems (1999-2001). I then completed my PhD (2002-2006) on electrolysers for hydrogen production from water and hydrogen fuel cells from Loughborough University, UK at the Centre of Renewable Energy Systems Technology (CREST), Department of Electrical and Electronic Engineering. I have also completed my MBA from Surrey University Business Schools, UK in 2015.

Teaching-phase-1 (1995-2002):

I then started my career at the age of 23 years as a Lecturer in Civil Engineering at the National Institute of Technical Teachers' Training and Research, India (1995-2002) to provide training programmes on advanced subject matters (on civil engineering) to industry personnel and academics (lecturers-professors) from various Indian Polytechnics and Universities.

Teaching-phase-2 (2019-ongoing):

I joined the School of Energy and Electronic Engineering at the University of Portsmouth, UK in September 2019 as a Senior Lecturer on Renewable Energy Systems. I am currently working with other colleagues to design brand new BEng, MEng and MSc courses related to Energy Systems at the University of Portsmouth which will be launched in due course. 

My Research & Business activities:

I completed my PhD at Loughborough University. I have been instrumental to build the UK's first large scale wind-hydrogen energy storage scheme of 8 MWh capacity at West Beacon Farm, Loughborough, Leicestershire. This large project was co-funded privately and I have then formed my first spin out company, Bryte Energy (2005-2009) from Loughborough University, with my two other co-researchers. At Bryte Energy I have done long term forecasting of energy systems including the future role of hydrogen energy. I have provided consultancy services to large utility companies. I have done due dilligence reports on energy technologies for investment bank/ VC funds.

AFC Energy Plc (2006-2009):

After completing my PhD on electrolyser and hydrogen fuel cells from Loughborough University in 2006, I started working at AFC Energy Plc from its inception (, which is an alkaline fuel cell company. I led the development of fuel cell technology. I worked for 4 years (2006-2009) at AFC Energy as the Head of Fuel Cell Division responsible for electrode development, stack development and system integration; later on I became the Business Development Manager there. After floating AFC Energy Plc on the AIM market of London Stock Exchange I then started another company, RE Hydrogen Ltd.


RE Hydrogen Ltd (2009-2016):

As the founder, CEO, CTO I have developed novel electrolyser and hydrogen compressor at RE Hydrogen and completed several Innovate UK funded projects on hydrogen energy related technologies in collaboration with leading industrial and University partners. I have received Rushlight Industry Award for my contribution on hydrogen and fuel cell sectors in the UK. I have been a member of Green Hydrogen Standards Committee, appointed by the Department of Business Energy & Industrial Strategy- BEIS- UK Govt. I am also a member of the UK working group OIML on Gas Metering for Product safety & standards, appointed by BEIS.


Engas UK Ltd (2014-ongoing):

As the founder/CEO/CTO, I have developed a novel CO2 capturing technology from biogas, landfill gas, syngas, coalbed methane, crude natural gas, & dry the gas apart from compressing it up to 250bar. I have developed a novel biogas upgrading technology to produce biomethane fuel for vehicles, back up power. I have sold my own bio-CNG vehicles refuelling plants to the UK and India and established manufacturing partners under licensing. 


Research interests

  1. My own Research Grants UK/ EU: 2009 to 2021

1. Sept 2021: Project cost: £1.5million: Collaborative project Hydrogen Production, compression, storage and refuelling of hydrogen boats in maritime applications. Innovate UK.


2. June 2018: Project cost: 99,400. Project title: “Liquid piston compressor to purify raw biogas into bio-CNG fuel.” Principle Investigator: Amitava Roy (Engas UK). Sources of funding: Innovate UK.


3 January 2017: Project Cost= £99,700. “Interconnected system for waste, energy, water and transport fuel with CO2 capture.”. Principle Investigator: Amitava Roy (Engas UK), Sources of funding: Innovate UK.


4. August 2017: Project Cost =£192,000. “Affordable biomethane production, storage, and refuelling kit for the world markets.” Principle Investigator: Amitava Roy (Engas UK). Sources of Funding: Innovate UK.


5. March 2015: Project cost: £40,000; “Integrated closed loop cycle for energy, fuel and bio fertiliser from waste”. Principle Investigator/Lead Technologist: Dr Amitava Roy; Sources of funding: Technology Strategy Board, Integrated supply chain for energy systems call.


6. Oct 2014: Project cost: £5000; “Business Development support for Growth Accelerator” by Oxford Innovations Ltd; Sources of funding: Technology Strategy Board.


7. July 2013: Project cost: £5000; “IP Audit, IP strategy, and Freedom to Operation Search on RE Hydrogen’s patents”, By Collar IP; Sources of funding: Technology Strategy Board.


8. Jan 2013: Project cost: £49,700; “Closed Loop carbon Cycle for food energy, fuel, waste and water”. Principle Investigator/Lead Technologist: Dr Amitava Roy;Sources of funding: Technology Strategy Board, SBRI call on Bio Energy (Greenius Awards).


9. July 2012: RE Hydrogen’s own cost: £596,000; Total Project cost was about £1.18M; “Green hydrogen production storage and use”. Partners: RE Hydrogen, Juwi Solar, flextricity, Crown Trucks, Revolve Technologies, Arcola Energy, Rutland Management Ltd. Sources of funding: Technology Strategy Board, Fuel cell and hydrogen- whole system integration call.


10. May 2012: Project cost up to £50,000; “Technology due diligence and commercialisation support” by Carbon Limiting Technologies; Sources of funding: EU funding for business incubation.


11. March 2012: RE Hydrogen’s own cost: “£415,000. The total project cost was £983,427.“90% lower cost electrolysers using novel catalyst and membranes to establish green hydrogen infrastructure for cross sectoral industrial markets”. Partners: RE Hydrogen, Newcastle University, C-Tech Innovation, flexitricity, juwi solar. Sources of funding: Technology Strategy Board Materials for Energy call.


12. Jan 2012: Project cost: £5,000. “Market and technology due diligence for RE Hydrogen’s electrolysers” by ISIS Innovation Ltd, Oxford. Sources of funding: Carbon Trust Fast Track Entrepreneurs Programme Business Incubation.


13. Sept 2011: Project cost: £60,000. “Development of 5kW alkaline electrolyser stack and hydrogen compressor”. Principle Investigator/Lead Technologist: Dr Amitava Roy; Sources of funding: European funding, Finance South East Sustainability fund.  


14. Sept 2011: Project cost: £60,000. “Development of 5kW alkaline electrolyser stack and hydrogen compressor”. Principle Investigator/Lead Technologist: Dr Amitava Roy; Sources of funding: European funding, Finance South East Commercialisation fund.


15. Aug 2011: RE Hydrogen’s own cost: £414,869. The total project cost was about £886,742. “Development of very low carbon footprint hydrogen distribution, utilising 90% lower cost alkaline electrolyser with low cost end-user fuel cell solutions manufacturing”. Partners: RE Hydrogen, British oxygen (BOC), and Arcola Energy. Principle Investigator/Lead Technologist: Dr Amitava Roy. Sources of funding: Technology Strategy Board High value manufacturing call.

16. June 2011: Project cost: £3000. “Third Party IP Audit on RE Hydrogen’s patents”. Patent Attorney: Harrison Goddard Foote, Sources of funding: Intellectual Property Office through the Technology Strategy Board.  


17. Nov 2010: Project cost £25,000. “Extremely low cost novel electrolyser for hydrogen production”. Principle Investigator/Lead Technologist: Dr Amitava Roy, Sources of funding: Technology Strategy Board. Technology Inspired Innovation callDisruptive Solutions for Energy call.


18. Oct 2009: Project cost £33,000. “Pressurised flash pyrolysis of cattle manure to produce upgrade bi-oil by in-situ hydrogen synthesis.” Principle Investigator/Lead Technologist: Amitava Roy, Sources of funding: Technology Strategy Board.


My International Funding for overseas projects

19. December 2017: £75,000: “Multiple Bio-CNG plants for India for refuelling of vehicles”. Source of funding: DSIR-India (Department of Scientific an Industrial Research).


20. March 2016: £26,000: “Bio-CNG upgrading technology to produce 72 Nm3 CNG per day”. Source of funding: DSIR-India (Department of Scientific an Industrial Research). 


My Publications:

i). Comparison of electrical energy efficiency of atmospheric and high-pressure electrolysers, International Journal of Hydrogen Energy, Volume 31, Issue 14, November 2006, Pages 1964-1979, Amitava Roy,Simon Watson and David Infield. doi:10.1016/j.ijhydene.2006.01.018 . Compared to other publications in the same field of similar age, this publication has 78 citations and has received 17 times more citations than the average.

ii). HARI case study report for the International Energy Agency -Rupert Gammon, Amitava Roy, John Barton, Matthew Little, CREST (Centre for Renewable Energy Systems Technology), Loughborough University, UK.

iii). Development of new materials for alkaline electrolysers and investigation of the potential electrolysis impact on the electrical grid, Cruden Andrew, Infield David, Kiaee Mahdi, Douglas Tamunosaki G. and Roy Amitava (2013), [in special issue: Selected papers from World Renewable Energy Congress - XI] Renewable Energy, 49, 53-57.(doi:10.1016/j.renene.2012.01.067).

iv). Compatibility of pressurised and atmospheric electrolysers with stand-alone renewable-hydrogen energy system- Amitava Roy, Simon Watson, David Infield. Proceedings of the 2nd European Hydrogen Energy Conference, November 2005, Zaragoza, Spain.

v). A novel design of a low cost, robust, efficient & dynamic electrolyser optimised for fluctuating & intermittent renewable energy powered operation-Amitava Roy, Simon Watson, David Infield. Proceedings of the International Congress of Young Scientists on Hydrogen May 2005, Turin, Italy.

vi).  Design of Hybrid Wind-Hydrogen energy system in stand-alone mode- Amitava Roy, Proceedings of the International Conference on world Wind energy conference and exhibition, July 2002, Berlin-Germany.

vii). Design of floating foundation for installation of wind turbine at offshore sites- Amitava Roy, Proceedings of the International Conference on wind Power for the 21st Century, September 2000, Kassel-Germany.