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Swansea University develops faster, greener carbon capture technology

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A fast, green and one-step method for producing porous carbon spheres, which are a vital component for carbon capture technology and for new ways of storing renewable energy, has been developed by Swansea University researchers.

The method produces spheres that have good capacity for carbon capture, and it works effectively at a large scale.

Carbon spheres range in size from nanometers to micrometers. Over the past decade they have begun to play an important role in areas such as energy storage and conversion, catalysis, gas adsorption and storage, drug and enzyme delivery, and water treatment.

They are also at the heart of carbon capture technology, which locks up carbon rather than emitting it into the atmosphere, thereby helping to tackle climate change.

The problem is that existing methods of making carbon spheres have drawbacks. They can be expensive or impractical, or they produce spheres that perform poorly in capturing carbon. Some use biomass, making them more environmentally friendly, but they require a chemical to activate them.

This is where the work of the Swansea team, based in the University’s Energy Safety Research Institute, represents a major advance. It points the way towards a better, cleaner and greener way of producing carbon spheres.

The team adapted an existing method known as CVD – chemical vapour deposition. This involves using heat to apply a coating to a material. Using pyromellitic acid as both carbon and oxygen source, they applied the CVD method at different temperatures, from 600–900 °C. They then studied how efficiently the spheres were capturing CO2 at different pressures and temperatures

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They found that:

• 800 °C was the optimum temperature for forming carbon spheres
• The ultramicropores in the spheres that were produced gave them a high carbon capture capacity at both atmospheric and lower pressures
• Specific surface area and total pore volume were influenced by the deposition temperature, leading to an appreciable change in overall carbon dioxide capture capacity
• At atmospheric pressure the highest CO2 adsorption capacities, measured in millimolars per gram, for the best carbon spheres, were around 4.0 at 0 °C and 2.9 at 25 °C.

This new approach brings several advantages over existing methods of producing carbon spheres. It is alkali-free and it doesn’t need a catalyst to trigger the shaping of the spheres. It uses a cheap and safe feedstock which is readily available in the market. There is no need for solvents to purify the material. It is also a rapid and safe procedure.

Dr Saeid Khodabakhshi of the Energy Safety Research Institute at Swansea University, who led the research, said: “Carbon spheres are fast becoming vital products for a green and sustainable future. Our research shows a green and sustainable way of making them.

We demonstrated a safe, clean and rapid way of producing the spheres. Crucially, the micropores in our spheres means they perform very well in capturing carbon.

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Unlike other CVD methods, our procedure can produce spheres at large scale without relying on hazardous gas and liquid feedstocks.

Carbon spheres are also being examined for potential use in batteries and supercapacitors. So in time, they could become essential to renewable energy storage, just as they already are for carbon capture.”

The research was published in the journal Carbon”.


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Environment

Cadle Heath is alive with the sound of critters

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From endangered bats to moths, beetles and unusual critters, a Swansea suburb is giving locals an opportunity to discover exactly what’s living on their doorstep.

The Cadle Heath BioBlitz event funded by the Swansea Nature Partnership on Saturday, May 14, is a day packed with scavenger hunts, guided walks, opportunities to learn about the wildflowers, bugs birds, reptiles and mammals and help to gather important nature data by recording the unusual species living in this urban heath.

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This nature reserve is one of Swansea’s best kept secrets and stretches from behind Swansea Community Farm on Carmarthen Road, to popular shopping-destination, Pontarddulais Road Retail Park.

The event, which is organised by Swansea Community Farm, South East Wales Biodiversity Records Centre and Penderi Green Regeneration project, will take place between 10am and 3pm at the farm. Followed by a bat walk at 8.30pm, giving people the chance to listen for the elusive, red-listed, Lesser Horseshoe Bat in its natural habitat.

Kate McCabe from Pobl, leading on the Penderi Green Regeneration Project, said: “This is an exciting event for us. Cadle Heath is one of the best examples of urban heathland in the country and we are proud to have such a rich, exciting space for nature in the heart of Swansea’s Penderi region. The fact that the heath is home to a red-listed bat species is something we should be really proud of and something we should protect and celebrate.”

“Cadle is in such a highly populated part of Swansea that it is often overlooked, and people don’t often realise the hidden haven that exists for local wildlife. This family-friendly event will really bring the area to life, giving people a unique opportunity to really explore the area with the guidance of passionate scientists and nature experts.”

Katharine Aylett, from Swansea Community Farm, said: “We are proud to be hosting such an important and exciting event for the area, and to be partners of Pobl’s Penderi Green Regeneration Project. At Swansea Community Farm, we know the positive effect activities like this have on the community and local wildlife; it’s about raising awareness of the natural world and bringing people together, outdoors. 

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“The Penderi Green Regeneration Project itself, is vital to the area and is already having a clear impact on this part of Swansea. We’re looking forward to working with them on future events and initiatives.”

The Penderi Green Regeneration Project is an initiative to support local people in their desire to improve green spaces in their area which will help boost health and wellbeing. Through a series of physical and educational opportunities, the initiative will bring the wider neighbourhood together to regenerate green spaces in the Penderi area of Swansea.

Funded by UK Government, under the Community Renewal Fund (CRF), Pobl Group is able to deliver the Project with the help of key partners, Swansea Environment Centre, Room To Grow and the Conservation Team at Swansea Council.

For more information on the free event, visit: www.swanseacommunityfarm.org.uk

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Environment

First Minister celebrates 10 years of the Wales Coast Path

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The First Minister will celebrate the 10th Anniversary of the Wales Coast Path with a visit to meet volunteers and walkers.

A year long programme of events and activities celebrating the Wales Coast Path will take place throughout 2022, including walking festivals, virtual challenges and art installations.

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Since its opening in 2012, the Wales Coast Path has established itself as a beacon of our nation’s natural beauty.

The 870 mile path guides walkers along Wales’ picturesque coastline, weaving its way past a hundred beaches and sixteen castles.

First Minister Mark Drakeford said: “The coastal path is one of the crowning glories of Wales and one of the proudest achievements of devolution.

“I would like to thank all those involved in the management of the path. Particularly the staff and volunteers, who are out in all weathers, working hard to maintain the path to such high standards.

“If I had to choose my favourite stretch of the path, the portion between Pendine and Amroth would be a candidate: starting in my own home county of Carmarthenshire, and ending in Pembrokeshire. It may not be the most well-known part of the path, but it offers huge variety: some challenging climbs, outstanding variety of flowers, secret coves and plenty of historical interest”.

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The Welsh Government will build on the successes of the first ten years so that more people are able to enjoy the path, from more backgrounds, more easily, and with more benefits for local communities, businesses and the environment.

The Deputy Minister for Climate Change, Lee Waters MS, asked Huw Irranca-Davies, MS for Ogmore to undertake a review of the Wales Coast Path.

A small group, drawn from academia and the public, private and voluntary sectors was established to undertake the review.

The Group reflected on the key achievements over the last decade and identified how to maximise opportunities for the future.

Their report has been published on the Welsh Government website today (11 May).

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The review recognises the potential value and challenges of the Wales Coast Path. It contains 19 recommendations for the Welsh Government to consider when developing its future strategic approach to the path.

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Dyfed Powys Police

Man banned from driving for 12 months for fishing offence

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A man from Merthyr Tydfil who travelled to the River Loughor, near Llanelli to fish using a barbaric and illegal method, has been banned from driving for 12 months as part of his sentence.

Vu Quang Tien pleaded guilty to an illegal fishing charge and also to a charge of obstruction of a Natural Resources Wales (NRW) Fisheries Enforcement Officer on 26 April at Swansea Magistrates Court.

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Mr Tien and two other anglers were witnessed by NRW Fisheries Enforcement Officers deliberately using the illegal foul hooking method of fishing – also known as snatching – at the river Loughor on 15 August 2021. NRW officers attended the site after several reports of illegal fishing were made to NRW’s 24/7 incident call centre by concerned members of the community.

When approached and questioned by NRW officers, Mr Tien and his accomplices showed significant hostility and reluctance to share identification documents which eventually had to be extracted by use of reasonable force.

All of Mr Tien’s fishing tackle and fish, along with his associates’ fishing tackle was seized by NRW Officers at the time of the incident. The district judge on the day at Swansea Magistrates Court gave permission to NRW to confiscate these items permanently from each of them.

The District Judge disqualified Mr Tien from driving for 12 months due to seriousness of the incident, and the premeditated and deliberate action of travelling such a distance to commit the offence.

He was also ordered to pay a total of £2,334 in fines, NRW costs and a victim surcharge.

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Mark Thomas, Fisheries Enforcement Officer for NRW, said: “We would like to again thank Dyfed Powys Police, the local communities and also the law-abiding anglers in the area for their continued support in reporting these illegal fishing activities.

“Foul hooking is a truly barbaric form of fishing carried out by a small minority of anglers in Wales, who have no regard for fish welfare.

“NRW and the Police take these incidents seriously as do the courts.

“Hopefully, the small minority of anglers who may in future, think of using any illegal fishing methods will take heed of the heavy fines and driving ban in this case issued by the courts.”

(Lead image: Natural Resources Wales)

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