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HiiROC

HiiROC Limited

Tunbridge Wells, Kent, United Kingdom

HydrogenLimited company
Founded 201951-200 employees
Profile last updated: August 19, 2026

About

Founded in 2019, HiiROC is a limited company headquartered in Tunbridge Wells, United Kingdom with approximately 51-200 employees specializing in Hydrogen.

HiiROC is a British company developing Thermal Plasma Electrolysis (TPE), a proprietary process that produces clean hydrogen and solid carbon without CO2 emissions. The process uses about one-fifth of the electricity required for water electrolysis and can convert biomethane (producing carbon-negative biohydrogen), flare gas or natural gas. HiiROC also develops Thermal Plasma Reforming for Sustainable Aviation Fuel through its subsidiary Zeleno Ltd. The company has development facilities in Hull, commercial offices in southern England and a research lab in Europe.

Headquarters

Tunbridge Wells, United Kingdom

Founded

2019

Employees

51-200

Company type

Limited company

Focus areas

Thermal Plasma Electrolysisclean hydrogenbiohydrogencarbon negativesolid carbonSustainable Aviation FuelThermal Plasma ReformingLow Carbon Hydrogen Standard

Products & services

Business models

B2B

Value chain

R&DDevelopment

Service areas (1)

  • Clean hydrogen production technology

    Thermal Plasma Electrolysis technology for producing clean hydrogen and solid carbon from biomethane, flare gas or natural gas.

Locations

Headquarters

Mount Ephraim 22, TN4 8AS, Tunbridge Wells, Kent, United Kingdom

Operating locations (1)

  • National Avenue 303, Hull, United Kingdom

Service regions

United KingdomJapan

Projects

5

Tokyo Gas MoU

PlannedHydrogen production

Non-binding MoU to explore a strategic partnership on decarbonisation and use of solid carbon by-product using HiiROC's Thermal Plasma Electrolysis technology in Japan.

JapanClient: Tokyo Gas Co., Ltd.

East Midlands Hydrogen Pipeline Concept Study

PlannedBiohydrogen production

Concept study to assess integrating HiiROC's TPE technology with EMP pipeline assets at Nottingham, targeting up to three tonnes of biohydrogen per day.

Nottingham, United KingdomClient: East Midlands Pipeline Ltd

Hydrogen-ready pipeline conversion (EMP)

PlannedHydrogen pipeline and storage

Repurposing a decommissioned 63 km underground fuel pipeline into a hydrogen-ready asset for storage and transport of clean hydrogen across the East and West Midlands, with HiiROC as hydrogen producer.

United KingdomClient: East Midlands Pipeline Ltd

Zeleno SAF feasibility study

PlannedSustainable Aviation Fuel production

Feasibility study by subsidiary Zeleno Ltd with Stratus Energy Partners on Thermal Plasma Reforming to produce Sustainable Aviation Fuel in Scotland, funded by Scottish Enterprise.

Edinburgh, United Kingdom

Thainstone Energy Park collaboration

PlannedHydrogen production

Exploration of deploying HiiROC's technology to produce clean hydrogen and recover waste materials at Thainstone Energy Park in Scottish Highlands, with Agile Energy.

United KingdomClient: Agile Energy

Credentials & affiliations

Certifications

Low Carbon Hydrogen Standard recognition for TPE process

Issued by: UK Government

Awards

UK Tech Innovator of 2022

KPMG2022UK Tech Innovator

Industry memberships

East Midlands Hydrogen

Partnerships

Tokyo Gas, East Midlands Pipeline Ltd, Stratus Energy Partners, Agile Energy, Catalsys, XeleratedFifty, Airbus, Forth Green Freeport

People

Management & team (4)

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