About us

Engas Global Ltd brings multiple products for energy storage, refuelling of gas-vehicles and back up power for charging of electric vehicles and electric boats:
1. a modular, containerised electrolyser for hydrogen production, 
2. 350bar hydrogen compressor, refueller and hydrogen storage.
3. a biogas-scrubber and 250bar bio-CNG refueller. 

Engas Global is based in Horsham, West Sussex, UK and have over 50 years collective experience on hydrogen production, hydrogen compression, hydrogen fuel cells, H2-ICE and biogas upgrading to biomethane (bio-CNG).

Engas Global brings hydrogen and bio-CNG technologies to the Indian markets

Engas is visiting Chennai and Kolkata, India under the Innovate UK sponsored Global Business Innovation Programme (GBIP) during 22-26th July. 

System optimisation

Engas Global team have deep understanding on how to optimise the complex trade off between the required electrical infrastructure, availability of surplus-electricity, cost of hydrogen storage, hydrogen safety considerations, and the cost of transportation of hydrogen to the point of use, linked with the size and cost of electrolysers for hydrogen production, for specific field applications and business models. Engas Global often undertakes feasibility studies, design studies, cost analysis, analysing hydrogen safety cases for demonstration projects.

Electrolysers will play a pivotal role to integrate more renewables with energy storage, manufacturing green chemicals, and transport sectors. As more and more renewables are connected to the energy mix, there will be a widening mismatch of demand vs supply of electricity thus creating major opportunities for energy storage to reduce this gap. Surplus electricity will be stored into batteries and hydrogen in particular for bulk energy storage for longer duration. Hydrogen production powered by offshore wind farms for refuelling of ships, ferries and heavy goods vehicles or hybrid vehicles (battery + hydrogen fuel cells) brings a clear opportunity for hydrogen.

Engas Global electrolysers, compressors and bio-CNG

Engas Global reduces the cost of electrolysers by 90%.

The capital cost of conventional electrolysers is very high and it contributes up to 70-80% of the overall cost of hydrogen. Therefore even if the electricity is free, the cost of hydrogen would still be over £2/kg H2 due to the capital cost for 1MW scale electrolyser running continuously for 10 years. But in reality renewable energy powered electrolysers would only run for about 30% of the time of the year at part load rather than at its full capacity, thus only about 15% capacity utilisation factor, resulting in higher cost of green-hydrogen of around £6-8/kg H2. But when the electricity cost (£1-3/kg H2 depending of tariff) and servicing costs (£0.5-1/kg H2) are added the overall cost of hydrogen tends to be about £7.5-£12/kg H2, which is much higher than equivalent diesel or LPG price.  
Engas Global is offering a combined electrolyser + hydrogen compression technology at 90% lower cost than conventional electrolysers to address this key challenges to make hydrogen viable to displace petrol/diesel, or fossil natural gas/ LPG.

90% lower cost hydrogen compressors for H2 storage

Far fewer companies make hydrogen compressors than electrolysers today. The lack of cost effective hydrogen compressors in small/medium scale influenced the electrolyser-stacks to be pressurised (10-30bars), which in turn increases the parts-counts of electrolysers adding a significant complexity in the balance of plant. However we still need up to 350-700bar storage pressure, thus an external compressor is still needed beyond the pressurised electrolyser stacks. There the combination of 10-30bar pressurised stacks along side a 350-700bar compressor makes any small/medium scale hydrogen project very expensive (potentially unviable) due to the individualised high capital costs of both pressurised electrolysers and a separate multi-stage compressor up to 350-700bar. Engas Global solved this problem by our atmospheric electrolyser stacks integrated with our own unique hydrogen compressor at a fraction of the cost of the conventional electrolysers 

Containerised, plug and play electrolyser and compressor

Engas Global brings 20 feet long containerised electrolyser integrated with a hydrogen compressor. 

a few of our selected hydrogen projects 

H2 powered boat

Engas Global is installing shoreside infrastructure to produce green hydrogen, compressing, storing and delivering hydrogen to refuel a hydrogen boat, Princess Royal in collaboration with Newscastle University and other partners which is partly funded by Innovate UK under the CMDC-3 round.  The RESTORE project will extend the operational range of CTVs (Crew transfer vessels) using hydrogen boosted propulsion to mitigate emissions at low cost. 

H2 production using biogas

Engas Global has installed a containerised electrolyser at a biogas CHP farm in West Sussex, UK to produce green hydrogen using the surplus electricity from biogas-CHP plants to create a greater value than the stranded electricity. Biogas powered electrolysers also would increase the capacity utilisation factor of electrolysers by operating up to 24/7 hours than a limited number of hours operation by solar PV and or wind turbines, to reduce the cost of green hydrogen significantly.

H2 refuelling infrastructure

Engas Global has demonstrated its containerised electrolyser and 350bar hydrogen refueller at Portsmouth International Port under the CMDC-1 round of Innovate UK. 

Engas Global's electrolyser is transportable plug and play containerised electrolyser and compressor system can be up and running within a few hours of being transported to a site.

H2 local-delivery

Engas Global is working together with partners to create a localised hydrogen delivery using IOT (internet of things) enabled solution for off-grid EV charging and back up power market to displace diesel. This project is currently being funded by Innovate UK.

H2 cylinders with IoT

Engas Global is bringing smart cylinders with IoT fitted for remote monitoring of hydrogen pressure, temperature, usages from these cylinders to understand, forecast demand, logistical planning and for scheduling the delivery of hydrogen to customers sites. 

H2 storage for boats

Engas is integrating this on-vessel hydrogen storage cylinders to install on a CTV (Crew Transfer Vessel) together with Newcastle University, Taurus Engineering and other partners in CMDC-3 project to power an on-board hydrogen-ICE to generate electricity for topping up batteries as range extender.

a few of our selected bio-CNG projects

Biogas upgrading to Bio-CNG

Engas is offering a biogas upgrading plants from 3-100Nm3/h raw biogas to produce up to 97% biomethane at 250bar pressure in cylinders. Bio-CNG provides the highest volumetric energy density than any other gaseous fuel. These two red-cylinders as shown here stores together up to 250kWh (HHV) energy offering much higher volumetric energy density than lithium ion battery.

Bio-CNG refuelling in the UK

Engas is also offering this biogas upgrading and 250bar bio-CNG refuelling plant for refuelling of city-buses and vans in the UK. It is particularly attractive for countries where a large number of CNG vehicles, e.g., buses, cars, 3 wheelers are already operating such as India. This portable plug and play Bio-CNG plants can be set up within a few hours to start refuelling vehicles. 

Bio-CNG refuelling in India

Engas has demonstrated this innovative, compact bioCNG 250bar refuelling plants in Kolkata-India, under the DSIR funding from the Indian government.   

Engas Global is offering dealership scheme to roll out our bio-CNG plants in India under an SPV (Special purpose vehicle) to create refuelling infrastructure for 2-3 wheelers in villages, towns and cities.  

Off-grid EV charging stations

The cost of getting a new 100kW-1MW grid connection for EV charging is fraught with delays, high-cost and uncertainties.  

Engas is offering cost effective, off-grid charging stations powered by our bio-CNG and hydrogen fuel. Biogas farms, city councils/municipalities, water companies, housing project developers, construction companies would benefit by this solution for rapid deployment at low cost. 

Off-grid DC and AC charging

Engas is offering 50-150kW ultra fast DC charging powered by our high energy density bio-CNG fuel. 

Engas is demonstrating off grid EV charging to directly recharge cars using our bio-CNG powered electricity.  Engas is working with leading battery companies to provide bulk energy storage powered by our bio-CNG fuel or hydrogen in 50kWh to 3MWh scale. 

Bio-CNG storage 6MWh

These bioCNG cylinders at 300bar can store up to 6MWh (HHV) energy which can be converted into 2.1 MWh electricity at 35% electrical efficiency and 3.9 MWh heat for various processes such as for evaporative cooling. In contrast a 40feet long shipping container will be required to store 2.1 MWh electrical energy which will cost over £1million. But our Bio-CNG energy storage solution offers fully sustainable solution at a fraction of these cost.

Portable biogas scrubber

This 3Nm3/h biogas scrubber can produce up to 25kg bio-CNG/day which will be equivalent to refuel 2500km/day driving distance @102km/kg CNG in a typical CNG motorcycle as an example. 

Engas bio-CNG refueller

Engas is offering this 250bar bio-CNG refueller for up to 3Nm3/h flow rate or up to 50kg Bio-CNG delivered per day. 

Engas refuelling at 250bar 

Engas bio-CNG plant is refuelling a Mercedes Sprinter van in Andover, UK for a logistic company.

Off-grid EV chargers powered by Bio-CNG fuel

Engas Global produces bio-CNG fuel from raw biogas and we store energy in Bio-CNG in cylinders at  20 times greater energy density than best lithium batteries to convert into electricity on demand for direct EV charging at a fraction of the capital cost of an alternative grid-connected battery powered EV charger solution. 

The bio-cng cylinders, the genset, and the ev chargers are packaged inside a container. 
Saves capital cost, generates new income for farms/car park owners and boost profitability.

Plug and play electrolyser

Engas Global's electrolyser is transportable plug and play containerised electrolyser and compressor system can be up and running within a few hours of being transported to a site.

Transportable electrolyser

Engas electrolyser, hydrogen compressor and hydrogen storage cylinders being delivered at the Biogas CHP site in Steyning, West Sussex, UK. 

Transportable bio-CNG plant

Bio-CNG plant is being installed at a dairy farm in Stockbridge, Hampshire, UK for plug and play operating within a few hours to start producing Bio-CNG fuels for vehicles and for back up power generation for EV charging.

Atmospheric electrolyser stacks integrated with own novel hydrogen  compressors

Engas Global is bringing in modular atmospheric electrolyser cells stacked up to 100kW/ stack. Multiples of 100kW stacks will be integrated up to 1MW scale electrolyser system fitted inside a 20 feet shipping container along with the balance of the plant for complete system integration. These electrolysers will be integrated with our high pressure compressor. Engas business model is to supply hydrogen and oxygen gas in pressurised cylinders or onsite generation as a service to the customers rather than selling the equipment.

Ambient pressure stacks
25bar pressurised stack

System integration

Engas Global team is experienced in balance of plant system integration of electrical systems, mechanical systems, hydraulic systems including ventilation, cooling/heating, safety and regulatory compliance.

Portable bio-CNG plant installed in Kolkata

Engas has demonstrated its portable, cost effective bio-CNG plant for 1-3Nm3/h raw biogas scrubber to produce up to 25kg bio-CNG/day. This unit also comes with a 250bar vehicle refueller as shown in the video to fill motor-cycles, 3 wheelers, or cars. This innovative technology solution would enable localised and modular and even mobile bio-CNG refuelling stations across the country. This was manufactured in the UK and exported to India.

Engas hydrogen system at Portsmouth International Port, UK

In this project Engas Global installed a 35kW electrolyser, a 137bar intermediate pressure hydrogen compressor, 350
bar booster/refuelling compressor, hydrogen refuelling nozzles.  
Engas Global plug and play electrolyser, SHAPE UK
350bar hydrogen refueller, SHAPE UK project

Shape UK- Seminar

Engas Global hydrogen system demonstration

Engas UK's disruptive innovations

Engas UK's electrolysers for H2 cooking

Atmospheric electrolyser

Engas is also bringing in 1-3kW low pressure electrolysers for onsite hydrogen production integrated with a low pressure hydrogen storage tanks to potentially use for domestic-cooking eliminating the need for expensive LPG cylinders, or natural gas or firewood in many developing or developed countries. Clean cooking using hydrogen: This solar-hydrogen cooking has the potential to address the very significant clean cooking challenges that over 2 billion people faces in the Africa, Asia and South America.  

Engas 100-350bar hydrogen compressor

Hydrogen compressor

This Innovate UK funded unique hydrogen compressor capable of scrubbing KOH from hydrogen and then drying hydrogen alongside compressing in a single step whilst operating at close to 98% volumetric efficiency unlike any piston/diaphragm, centrifugal, screw, rotary type compressors. This will be a single phase low power, high pressure hydrogen compressor enabling home hydrogen refuelling combined with our smaller modular electrolysers producing up to 1kg hydrogen/day which is equivalent to drive up to 100-150 miles/kg hydrogen using a suitable fuel cell car.

Presentations and H2 awareness video

The following presentations and hydrogen safety video production is intended for basic awareness on hydrogen energy systems, costing and safety. Please contact us for more detail information if you have any queries.

Hydrogen in comparison with other fuels

Hydrogen has the highest specific energy density (kWh/kg) than any other fuel apart from nuclear fuel. But hydrogen has very low volumetric energy density (kWh/lt), than most liquid and gaseous fuels. Therefore hydrogen needs to be compressed to increase its volumetric energy density. 
  • For every 1kg hydrogen produced, 7.8kg oxygen is also produced as a free by-product.
  • A typical electrolyser takes about 50-60kWh electricity and 11.2litre de-ionised water to produce 1 kg hydrogen and 7.8kg oxygen.
  • The electrolyser operates at about 70-80% electrical efficiency depending current density.
  • Large electrolysers can also generate heat via a heat exchanger as 10-20% of its rated electrical capacity.
  • 1kg hydrogen is equivalent to about 3.78litre of diesel on energy content basis.
A comparison chart between hydrogen, natural gas and LPG is also provided below (first chart). The right hand side chart shows the energy densities of different fuels and it highlights that hydrogen gas the lowest volumetric energy density than any other gaseous fuels. 

Comparison of flammability of hydrogen gas

Gaseous hydrogen has the lowest volumetric energy density (kWh/lt) i.e. 1/3rd of natural gas, and also hydrogen has 4-6 times greater diffusion coefficient than natural gas and propane. So in a ventilated place hydrogen offers significant advantages than natural gas and LPG (propane/ butane) with respect to safety aspect.
Flammability range of hydrogen, natural gas, propane and petrol vapour
Hydrogen explosive limits in air compared to natural gas and LPG

Hydrogen safety

The flammability range of hydrogen is 4%-75% in air, whereas natural gas has 5%-15% in air, and LPG has 2.15%-9.6% by volume in air, which means LPG would potentially reach its upper flammability limit (9.6% in air by volume) ahead of natural gas (15% in air by volume) whereas hydrogen needs a much greater leak for a much longer period to build up the required level of concentration (i.e. 75% in air by volume) in a ventilated place due to its 5-6 times greater diffusion coefficient (i.e. higher buoyancy force).

The above chart also highlight the required concentration to reach the lower or upper explosion limits; hydrogen needs about 18.9-59% in air by volume, but natural gas needs 5.7%-14% in air by volume and LPG needs 1.4%-3.3% in air by volume, which again highlights the facts that hydrogen needs a much larger leak for a much longer duration to build up the required concentration than other fuels, which again may be considered as an advantage for hydrogen as a relatively safer fuel in a ventilated place. 
D. Cirrone, D. Makarov, C. Proust, V Molkov International Journal of Hydrogen Energy Volume 48, Issue 43 , 19 May 2023, Pages 16530-16544

Minimum Ignition Energy of hydrogen

The minimum Ignition Energy of hydrogen should be considered with respect to its concentration (air-H2 mixture), however often people refer to 0.02mJ with respect to about 29% hydrogen concentration in air, which might be difficult to sustain in a ventilated place due to the 4-6 times diffusion coefficient of hydrogen gas than natural gas or LPG. The required minimum ignition energy of hydrogen at 4% hydrogen in air (i.e. the LEL= 4% hydrogen in air) is about 5mJ according to various models (experimental and predictive), which is comparable with methane and other flammable gases. Therefore having hydrogen leak detectors set at 25% of LEL i.e. 1% hydrogen in air mixture, should provide an early warning system to mitigate the risk before it can reach anywhere near 29% concentration in air.  Having said that the quantum of energy (HHV) in hydrogen in ambient pressure (i.e. at 29% H2 in air mixture) would still be 1/3rd of Methane (HHV) because the hydrogen has the lowest volumetric energy density (kWh/Nm3)  than any other gaseous fuels.