Completed Clean Energy Chemistry

Roto-reformer Ammonia Cracker (RAC) for decentralised on-site, on-demand hydrogen refuelling station

In plain English

AI plain-English summary

A compact ammonia cracker the size of a shipping container will produce hydrogen on demand at vehicle refuelling stations, bypassing the need to transport hydrogen itself. Hydrogen is essential for decarbonising heavy trucks and buses, but building a refuelling network faces a chicken-and-egg problem: stations are uneconomical when demand is low, and operators won’t buy hydrogen vehicles without reliable refuelling. Ammonia offers a workaround—it stores hydrogen at high density, is cheap, and already moves globally via existing infrastructure. The catch is that extracting hydrogen from ammonia currently requires large, centralised plants that burn fossil fuels to reach cracking temperatures, erasing environmental gains and still needing hydrogen transport. This project builds a compact, energy-efficient cracker that sits at the refuelling station itself. If successful, it would let station operators produce hydrogen on-site, on demand, matching the operational model of today’s diesel pumps. That could break the infrastructure deadlock, giving freight and bus operators confidence to switch to hydrogen before 2040, when new diesel truck sales are banned. The impact is a refuelling network that quietly keeps heavy transport running—without the carbon.

View original technical description
Hydrogen is widely anticipated to play a crucial role in decarbonising HGV freight and public transport particularly bus operations. Net-zero regulations will ban the sale of new diesel HGVs/trucks by 2040\. However, the challenges of delivering an economically viable hydrogen refuelling network (HRS) at initial/low infrequent demand combined with supplying hydrogen at cost-parity to diesel for commercially viable freight/transport operations are significant barriers for operator confidence to transition to hydrogen vehicles. Ammonia is gaining traction as a zero-carbon high density, low-cost hydrogen energy-carrier, overcoming the challenge of transporting and storing hydrogen with already well-established global logistics infrastructure for bulk transport. Ammonia-cracking plants to extract hydrogen are in the early, pre-commercial stages of development. All are centralised high volume cracking technologies requiring combustion to achieve the high temperatures for the cracking process to occur. This approach risks environmental gains from green ammonia production and does not overcome the challenges and costs of transporting hydrogen to the point of use for refuelling hydrogen vehicles. This project will develop a highly energy-efficient ammonia cracking technology in a compact form to deliver commercially viable on-demand hydrogen production at the point of use. The project outcomes will enable the development of hydrogen refuelling station networks in line with current diesel refuelling operational and business models.

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Related Research

Grants with similar aims, by meaning.

Ammonia Cracking for High Purity Hydrogen
Green ammonia cracking for transport
Low cost hydrogen for fuel cell transport
Storage and Distribution of Low Carbon Ammonia as an Economical Hydrogen Carrier to Decarbonise the Cement Industry
SMAHRT - Scalable Modular Ammonia to Hydrogen Refueling Terminal

Original classification

Collaborative R&D

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