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Research Group: Materials, Concepts & Reaction Engineering

Our world is facing major technical challenges. We deliver innovative solutions.

We combine expertise in chemistry, materials science, and chemical engineering to find solutions for emerging global technological challenges. We develop new materials and innovative reaction engineering concepts by designing new membranes, chemical looping materials and catalysts.

Our team, which comprises academics, research fellows, postdoctoral research associates, and PhD students applies new materials, transformative concepts, and creative reaction engineering to:

  • carbon dioxide separation
  • hydrogen production
  • ammonia synthesis
  • methane conversion
Material, concepts and reaction engineering students

Reaction engineering research

We focus on designing new ion-conducting materials. We then characterise them, and their interaction with the gas phase, to develop novel concepts in membrane separations, chemical looping cycles and heterogeneous catalysis.

For example, ion-conducting membranes undergo gas-solid reactions. These reactions complement the transport of charger carriers within the membrane, leading to gas permeation. Similar fundamental processes are critical in the function of a chemical looping cycle and particular catalysts.

We then exploit our fundamental understanding of materials for new reaction engineering concepts in lab-scale reactors. We explore processes including carbon dioxide capture, hydrogen production, ammonia synthesis, methane conversion, and automotive emissions control.

Cutting edge

We are at the cutting-edge of reaction engineering as we aim to cover the full value chain – materials, characterisation, processes, modelling and reactor engineering – so that we can bring fundamental discovery science to real-world application.

Many high-impact journals have accepted our papers for publication, and we are developing pilot-scale processes based upon our lab-scale investigations.

We currently receive funding from:

  • the Engineering and Physical Sciences Research Council (EPSRC) under the Programme Grant, Standard Grant and Centres for Doctoral Training schemes
  • the Royal Academy of Engineering under the Chairs in Emerging Technologies scheme and the Research Fellowship scheme

We have also received support from UK and European institutions and industrial partners.


We are a very research-intensive group. Publications are our main output, please see the selection below.


We study oxygen-ion and electron conducting solids infiltrated with molten salts. This combination of materials allows us to develop new highly-selective gas separation membranes. In Energy and Environmental Science, we demonstrated that this emerging class of membrane, the supported molten-salt membrane, has outstanding performance.

We also exploit ion-conducting properties in chemical looping processes. In Nature Chemistry, we described an entirely new approach to chemical looping, based on the properties of a non-stoichiometric perovskite.

We also study catalysts prepared by exsolution, where a metal is exsolved from a perovskite. Co-electrolysis and catalytic applications use these materials. They have enhanced activity, stability, and coking resistance.


We investigate the structure and stability of supported molten-salt membranes. For example, we use X-ray micro-CT with collaborators to study the development of membrane structure in three dimensions. We also perform wettability measurements. These help us develop self-healing membranes.

We study our chemical looping materials during operation. We have spent significant time at beamlines to carry out detailed in-situ characterisation. We have also used X-ray micro-CT to track the structural evolution of a single chemical looping particle.

For exsolved materials, we use many in-situ characterisation techniques. These include synchrotron X-ray diffraction and environmental transmission electron microscopy (TEM). We apply these characterisation techniques in fundamental studies and for application.


We design and operate lab-scale membrane reactors for high-temperature ceramic membranes. We couple these with our significant capabilities for gas analysis, using methods  such as mass spectrometry and infrared spectroscopy.

Our integral reactor is a unique lab-scale reactor. It allows us to test new chemical looping materials whilst accessing the bed with, for example, diffraction techniques. Coupled with our thermogravimetric analyser (TGA) and pilot-scale looping reactor, we can test these materials over hundreds of cycles.

We also design lab-scale reactors to test catalysts for automotive exhaust catalysis, chemical looping combined with catalysis, and electrolysis.


Join us

Job vacancies

We often have new vacancies within our team. Check out Newcastle University vacancies for current opportunities.

Contact us

Get in touch with our Head of Group, Prof Ian Metcalfe, or any of our staff to discuss how we can collaborate in our education or research activities.

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