Applications are now open for PhDs for October 2026 entry. Applications will be reviewed on an on-going basis. At the point of application you will be given a choice to EITHER a) apply to up to two specific projects or b) apply to the CDT-GIF programme, indicating up to two universities at which you would be interested to study.*
*Please be advised that currently only Imperial College London are accepting applications from international students. Whilst the system will allow international students to apply for ‘home only’ projects at all four universities, such applications are NOT being read/reviewed/considered by either the Central Team or the project supervisors at University of Sheffield, University of Bath or Heriot-Watt University.
If you are interested in applying for any of the specific projects listed below, please visit the How to Apply page and click the ‘Apply Now’ button. You may apply for up to 2 projects at any one point in time.
Heriot-Watt University Projects
We have project options across a range of areas, including but not limited to advancing sustainable polymer biodegradation, CO₂ measurement techniques for CCUS, co-adsorption in carbon capture, and hydrogen storage using repurposed oil and gas wells. Supervisors are involved in projects supported by industry. We welcome applicants interested in experimental methods and industry-focused decarbonisation research.
Please note these opportunities are currently open to Home students only at the moment. See the “How to Apply” page for full eligibility criteria.
Capturing CO2 from air may prove an indispensable technology for combatting climate change, but current costs (partially driven by high energy use) present a significant hurdle to commercial deployment. Most investigations focus on using chemical adsorbents for direct air capture, while the USORB-DAC project (https://usorbdac.hw.ac.uk/) has shown that some physical adsorbents may also show potential, subject to contactor and process design. A key open question is how different chemical and physical sorbents perform in different air contacting geometries. This project will expand on previous solid sorbent direct air capture work at Heriot Watt by investigating chemical and physical adsorbents in different contactor types, e.g., monoliths, films, or fibres via simplified and/or detailed mathematical modelling. This will pave the way for future process design, testing, and scale up.
Achieving net-zero and net-negative greenhouse gas emissions will require scalable and durable carbon dioxide removal (CDR) technologies. One promising pathway is mineral-based carbon capture and storage, in which carbon dioxide reacts with alkaline materials to form stable carbonate minerals. Lime (CaO/Ca(OH)₂), widely produced for industrial applications, offers a highly reactive and potentially scalable material for such processes.
This PhD project will explore lime carbonation systems for carbon dioxide removal, focusing on the fundamental chemistry, process design, and system-level performance of lime-based CDR pathways. The research will investigate how lime can be used to capture CO₂ from air, while addressing challenges related to kinetics, energy demand, material cycling, and overall environmental impact.
-The project may include, but is not limited to, the following topics:
-Fundamental carbonation kinetics of lime and hydrated lime under varying conditions
-Design and optimisation of lime carbonation reactors and systems
-Coupling lime carbonation with calcination and material regeneration cycles
-Evaluation of energy, carbon, and material balances for lime-based CDR systems
-Life cycle assessment and techno-economic analysis of candidate processes
-Integration of lime carbonation into industrial or environmental contexts
The exact focus will be shaped by the candidate’s interests and background.
Hydrogen is expected to play a major role in building a green industrial future, but producing it sustainably is still a challenge. This project will investigate how renewable energy sources such as solar panels and wind turbines can be used to power electrolysers, which split water into hydrogen and oxygen. Since sunlight and wind are not constant, the project will explore how weather and energy intermittency affect the amount of hydrogen produced in real time. Students will gain hands-on experience with laboratory experiments using solar-powered electrolysis, combined with computer simulations of wind-driven systems. Alongside the technical work, the project will assess the economic feasibility of renewable hydrogen production and its potential role in supporting industry to move towards net zero.
Developing new technologies to reduce atmospheric CO2 levels is a globally important research challenge. One of the most promising technologies is direct air capture (DAC), which selectively captures CO2 from air for downstream utilisation or storage. DAC systems currently include a process step that uses chemisorbents, such as amine-based materials, to capture CO2. These sorbents are highly selective for CO2, which is important because the concentration of CO2 in the air is around 400 parts per million. However, using chemisorbents for this separation stage presents sustainability challenges, including the need for high energy inputs to regenerate the sorbent during cycling.
This PhD project aims to develop porous materials (physisorbents) that capture water or CO2 from air via physical adsorption. Physisorbents are, in principle, advantageous for DAC systems because they bind CO2 less strongly, which reduces the energy input required for regeneration. However, a key challenge of using physisorbents is the presence of water vapour in the air, which can interfere with CO2 capture. We propose to overcome this by developing an innovative two-step process that combines two separation steps: 1) water harvesting to remove moisture from air, followed by 2) CO2 capture from the resulting dry air. By this combined strategy, the DAC process can become more resource-efficient, particularly in water-stressed areas. The project will interface with a large project team that includes industrial collaborators to develop innovative machine learning methods to accelerate the discovery of physisorbents (Nature, 2024, 632, 89).
The project is at the interface of chemistry and chemical engineering. It will involve synthesis and testing, focusing initially on metal-organic frameworks, which have tunable pore structures that can be optimised for specific applications, including CO2 capture. However, there is scope to expand to other material classes such as covalent organic frameworks.
The use of CO₂ as a resource and feedstock for chemical synthesis has been proposed as a way to cut reliance on fossil fuels and to reduce global anthropogenic CO₂ emissions by around 10%. Among the many sources of CO₂, flue gas from fossil fuel combustion and industrial activity stands out as a major, localised, and concentrated stream that can be directly targeted. Flue gas is composed primarily of nitrogen, but it also contains up to 33% CO₂, water vapor, and smaller amounts of other harmful pollutants, including carbon monoxide, nitrogen oxides, and sulfur oxides. Tackling flue gas emissions is therefore a powerful and practical strategy for curbing greenhouse gases at their point of release.
Nitrogen oxide emissions are often overlooked, even though their environmental and health consequences are profound. As key drivers of smog, acid rain, and ozone layer depletion, these compounds destabilize ecosystems and harm human health. Meanwhile, nitrous oxide, the third most abundant nitrogen oxide component, is itself a greenhouse gas with nearly 300 times the warming potential of CO₂. The steady rise in atmospheric nitrogen oxides demands urgent solutions. Beyond mitigation, these pollutants and their derivatives such as nitrites and nitrates represent an untapped opportunity as they can be converted into valuable products.
This project aims to address both challenges by developing process models for an electrochemical platform that can simultaneously purify and valorise CO₂ and nitrogen oxides from industrial flue gas. The work begins with thermodynamics-based models, which will then evolve in complexity to account for additional factors needed to achieve realistic and adaptable process models for industrial use. The end goal is to deliver robust tools capable of guiding industrial-scale implementation.
To achieve net-zero targets by 2050, it is essential to remove significant amounts of carbon dioxide (CO₂) from the atmosphere, in addition to substantial reductions in greenhouse gas emissions. This project focuses on optimizing and reducing the costs of Direct Air Capture (DAC) technologies, a critical pathway to CO₂ removal from the atmosphere, by exploring the application of Metal-Organic Frameworks (MOFs) as advanced materials.
MOFs, renowned for their high surface area, tuneable porosity, and versatile chemical functionalities, hold immense potential for a wide range of applications including CO₂ capture. The student will investigate MOF-based solutions for DAC, with an emphasis on developing data-driven approaches for speeding up the screening of materials and the evaluation of the performance of DAC processes.
The research will also focus on assessing materials performance under real-world conditions and evaluating their cost-effectiveness and scalability for industrial adoption. Additionally, the project will compare the performance of MOFs with benchmark materials and current state-of-the-art technologies to provide a comprehensive evaluation of their advantages and limitations. This comparative analysis will help identify opportunities where MOFs can outperform existing solutions and contribute to the development of innovative and competitive technologies for addressing global energy and environmental challenges.
The project will provide hands-on experience in research methodologies, critical thinking, and problem-solving in this impactful and rapidly growing field.
Saline aquifers represent the largest long-term CO₂ storage option in the UK Continental Shelf (UKCS), offering vast capacity and fewer penetrations than depleted hydrocarbon fields. Recent assessments confirm that open aquifers dominate the offshore resource base, yet their potential is often underestimated when storage evaluations focus only on structural traps. Migration Assisted Storage (MAS) provides a promising alternative, allowing injected CO₂ to migrate within unconfined aquifers where it is progressively immobilised through residual and solubility trapping. Although the concept has been recognised in other regions, its capacity, behaviour and risks under UKCS conditions remain poorly constrained.
This PhD will advance the scientific basis and practical feasibility of MAS for UK aquifers by investigating the factors that control plume migration, trapping efficiency and long-term containment. The project will quantify the additional capacity that MAS could unlock compared to conventional structural storage, while evaluating how geological heterogeneity, facies connectivity and intraformational barriers influence plume behaviour and immobilisation. It will also develop approaches to predict dynamic plume footprints, providing a scientific foundation for defining safe site boundaries in migration-based storage systems. A further component will examine the interaction of migrating CO₂ with other subsurface users in the North Sea, including legacy wells, hydrogen storage and offshore renewables, to explore both risks and opportunities for coexistence. The project will also consider monitoring and verification strategies tailored to MAS, assessing how different technologies could be deployed to detect and track plumes in complex offshore environments.
This research will strengthen the UK’s storage portfolio and contribute directly to the safe, efficient and large-scale deployment of CO₂ storage in support of national net-zero targets.
The amount of industrial waste has been increasing worldwide along with the global population, being considered as a main concern due to the impact not only to the environment but also to the human health and economy. This project will be focused on transform this industrial waste into added value products and green energy carriers by the utilisation of an energy efficient Magnetic Induction Catalytic system recently developed by our group. The project will aim to develop and test new magnetic catalysts based on earth-abundant and inexpensive transition metals such as Nickel, Cobalt and Iron as active supported nanoparticles. The textural and structural properties of the synthesised magnetic catalysis will be then studied and analysed by using different techniques such as X-ray, BET sorption analysis and FT-IR spectroscopy, among others. Then, they will be tested in different reactions at different conditions in order to obtain specific added value products and energy carriers such as Hydrogen or Biofuels, which will help to transit to a circular economy.
The aviation sector faces one of the most significant challenges in the global shift towards net-zero emissions. Due to strict energy-density requirements, the complete electrification of medium- and long-haul aviation is not achievable in the near future. Therefore, the switch to sustainable aviation fuels (SAFs) produced from captured CO₂ is among the most promising options for lowering the sector’s carbon footprint. However, current SAF production methods are hampered by inefficient catalytic processes and high energy consumption. Overcoming these obstacles requires advances in catalyst design, reaction engineering, and process optimisation.
Porous heterogeneous catalysts (e.g., zeolites) offer significant advantages for SAF production due to their high surface areas, tunable pore structures, and ability to stabilise active sites with molecular-level accuracy. These properties are especially advantageous for the complex reaction steps involved in SAF production.
This PhD project will focus on developing and optimising porous heterogeneous catalysts and reaction processes for SAF production. The successful candidate will collaborate with an industrial partner to convert methanol produced via the partner’s proprietary, commercialised CO₂ conversion technology into hydrocarbons suitable for SAF. The project will integrate catalyst design, synthesis, and catalytic screening within continuous-flow reactors for SAF production.
A key aspect of this studentship is the opportunity to develop and incorporate machine learning tools for reaction optimisation. By developing and combining flow chemistry reactors and analytical workstations with data-driven methods such as Bayesian optimisation, the project aims to accelerate the exploration of catalyst compositions and reaction conditions. This approach will be used to identify optimal performance regimes and structure–performance relationships more quickly, thereby enhancing catalytic efficiency for SAF production.
Energy Storage for distilleries; non-continuous renewable energy providing reliable heating on demand
Challenge Statement: How do you store non-continuous energy from renewable sources to provide consistent energy on demand for distilling. This project will look at a Future technoeconomic study based on distilling industry scale (from small distilleries to clusters to large individual sites), demand profile (e.g. 5-day production, 7-day production), and geography (rural, remote, island). Working in collaboration with Diageo Technical and Sustainable engineering teams to imagine a realisable future for local low or zero carbon energy production and storage to power future distilling. The project will also offer the opportunity to spend time on an industrial placement with a Diageo technical team.
Waterless Distillery – Radical Water Reduction in Scotch Whisky Production
Challenge Statement: How do we make Scotch Whisky distilling processes water neutral (1L water used to produce 1L in product) to eliminate wastewater and potential strain on local water supplies, while ensuring continuous production? This project will look at the full distilling process in scotch whisky and reimagine all aspects of the traditional role of water. This will include looking beyond what is currently possible – a theoretical design of the lowest possible water consumption that could still deliver spirit recognisable as scotch whisky. Working in collaboration with Diageo Technical and Sustainable engineering teams, the project will also offer the opportunity to spend time on an industrial placement with a Diageo technical team.