Aerosol particles emitted from transport can impact on air quality, human health and global climate. CDT projects are exploring the non-exhaust emissions from road transport, including from tyre and brake abrasion, and how these particles can impact on health. Projects are also exploring the emissions from jet engines, both in the laboratory and in the environment, their role in contrail formation with the associated impacts on climate and their potential health impacts. The impact of volcanic particles on aircraft engines is also being explored.
Nanoparticles from non-exhaust emissions: lung deposition and potential health impacts
With the ongoing transitions to hybrid and electric vehicles, tailpipe emissions will continue to fall but non-exhaust emissions are expected to rise. While a large body of research has been already done on the quantification of tailpipe emissions, their atmospheric fate, and their impact on public health, such information for non-exhaust emissions is currently scarce.
The aim of this PhD project is to fill the gap of knowledge on non-exhaust emissions, through an in-depth size and chemical characterisation and by assessing their intrinsic ability to cause lung inflammation and exacerbate diseases.
The impact of aircraft engine emissions and alternative fuels on contrail formation
Contrails are a large contributor to the climate impact of aircraft, new fuels have been proposed to reduce this impact, but their efficacy is currently unclear. This project will use satellite data to measure the development of contrails, developing accurate estimates of the impact of alternative fuels to meet climate targets.
Transport and dispersion of non-exhaust pollutants
The most damaging form of pollution is particulate matter, which can be formed by brake wear, tyre wear and resuspension. This project will investigate the transport and dispersion of non-exhaust pollutants in the flow around a vehicle, with the aim of predicting the exposure of pedestrians and other road users.
This project is an industry funded studentship supported by The Centre for Sustainable Road Freight.
Microscale dynamics and light scattering characteristics of ice crystals in contrails
The climate impact of flying is dominated by the effect of contrails, white streaks you often see trailing behind an aircraft in the sky. This project will reduce uncertainty and fill gaps in our understanding of the aerosol processes that affect how contrails form, survive and contribute to climate change.
Evaluation of the health impacts of aircraft nanoparticles using a surrogate soot source and in vitro cell exposure
Aircraft engines emit nanoparticles that may have specific health consequences due to their size and composition, especially near airports. This project will develop a laboratory source of surrogate aircraft soot particles that will be deposited on cell cultures to evaluate cellular responses and advance understanding of nanoparticle health impact pathways.
Particle Transport and Losses in Sampling Aircraft Gas Turbine Engine Combustion Emissions
Understanding soot formation and transport at the interface between engine exit and the combustor of a large gas turbine aircraft engine remains a significant challenge. This project will look to elucidate the problem, working closely with Rolls Royce, and will ultimately lead to a better understanding of the environmental impact of engines.
This project is an industry funded studentship supported by Rolls Royce.
Damage to jet engines by airborne particulates; Detection and mitigation
Mineral aerosols, such as volcanic ash and desert dust, present significant but uncertain risk to jet aircraft. To constrain this uncertainty the PhD researcher undertaking this project will design, build and test a jet engine simulator that will emulate engine conditions and will be field tested in a real world environment. The denouement of this project will be flying the simulator into desert storms and volcanic ash clouds on drones.
EPSRC CDT in Aerosol Science
University of Bristol
School of Chemistry
Bristol, BS8 1TS
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