Ammonia as a Hydrogen Carrier: Simulation and Optimization for Efficient Energy Logistics

Project »AmmonVektor«: Ammonia as the Key to Hydrogen Transport

Ammonia is being discussed as a possible carrier for green hydrogen. In this context, Fraunhofer ITWM is developing software tools for model-based decision support with regard to technical and organizational issues. These tools are intended to ensure transparency and comparability of different solution approaches.

Hydrogen is considered an energy source of the future. However, transporting it over long distances – under high pressure or liquefied atcryogenic temperatures – is very costly compared to transporting fossil fuels. Currently, there is also a lack of suitable ships. The Fraunhofer flagship project »AmmonVektor« is looking for solutions to these logistical challenges – among other things, with expertise from our team at Fraunhofer ITWM. Our researchers are developing models for safe and efficient hydrogen logistics based on ammonia.

In its liquid form, it can be transported easily and with low energy consumption. Unlike hydrogen, a global transport infrastructure already exists for ammonia due to fertilizer production.Once it arrives at its destination, hydrogen can be recovered from the transported ammonia using suitable cracking reactors. This is why ammonia is referred to here as an »Energy-Vektor«. However, it can also be used directly.

The Entire Value Chain at a Glance: Decentralized Availability of Hydrogen

During the three-year project period, researchers in the project consortium are examining the entire value chain for electricity, heat and hydrogen. They are developing new processes for flexible and energy-efficient ammonia synthesis, as well as technologies for splitting ammonia to recover hydrogen. The direct use of ammonia to generate electricity and heat is also a focus of the research. In addition, the project partners are working on storage and logistics concepts as well as viable business models – with the aim of providing hydrogen in a decentralized and demand-oriented manner using ammonia in the future.

The »AmmonVektor« Project Is Divided Into Five Subprojects:

  • Decentralized, flexible ammonia synthesis
  • Transport, storage and safety
  • Decentralized hydrogen recovery (ammonia cracking)
  • Direct ammonia utilization
  • Designing sustainable and resilient value chains

Efficient Logistics Planning: Simulations for Safe Ammonia Transport

Our researchers from the division »Optimization« and »Processes and Materials« contribute their expertise to the subprojects »Transport, Storage, and Safety« and »Designing Sustainable and Resilient Value Chains«. Our initial focus is on developing a model for simulating and evaluating various application scenarios for ammonia in a future hydrogen economy.

To this end, we are developing a software demonstrator that can be used to map the interaction between the production, transport, and use of hydrogen and ammonia in different constellations. Based on these simulations, we are working with our project partners to collect practical data with the aim of systematically analyzing and specifically optimizing the hydrogen supply chain.

Hydrogen Supply Chain With Ammonia as a Transport Derivative in the Project »AmmonVektor«.
© Fraunhofer ITWM
Hydrogen Supply Chain With Ammonia as a Transport Derivative in the project »AmmonVektor«.

Split Reactor in the Digital Twin: Modeling, Optimization, Design

In the subproject »Sustainable and Resilient Value Chains«, we are developing an equation-based model of a cracking reactor to accurately map the process of hydrogen recovery from ammonia. The goal is to calibrate the simulation model using experimentally collected measurement data. This creates a virtual reactor that enables optimized operational management of the cracking process. Multi-objective optimization methods are used to identify specific compromises between conflicting requirements, such as maximum hydrogen yield with minimum greenhouse gas emissions. In addition, we analyze how uncertainties in the model parameters affect the results of the simulation and optimization.

Another focus is on the fluid dynamic design of the reactor: we optimize the design of the flow components specifically with regard to the heat exchange between the chemical reactions inside. The goal is stable and efficient operation for maximum chemical utilization of the cracking reactor.

The Following Fraunhofer Institutes Are Participating in the Project Consortium:

  • Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT
  • Fraunhofer Institute for Chemical Technology ICT
  • Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB
  • Fraunhofer Institute for Ceramic Technologies and Systems IKTS
  • Fraunhofer Institute for Material Flow and Logistics IML
  • Fraunhofer Institute for Microengineering and Microsystems IMM
  • Fraunhofer Center for International Management and Knowledge Economy IMW
  • Fraunhofer Institute for Industrial Mathematics ITWM

Project Funding and Duration

The Fraunhofer flagship project »AmmonVektor« is funded by the Fraunhofer Society. It started in January 2024 and runs until December 2026.