UK Breakthrough Could Slash Emissions From Cement
The title of this post. is the same as that of this article on the BBC.
This is the sub-heading.
Scientists say they’ve found a way to recycle cement from demolished concrete buildings.
These five paragraphs outline, why cement is such an environmental problem.
Cement is the modern world’s most common construction material, but it is also a huge source of planet-warming gas emissions.
That is because of the chemical reactions when you heat limestone to high temperatures by burning fossil fuels.
Recycling cement would massively reduce its carbon footprint. Researchers say that if they switched to electric-powered furnaces, and used renewable energy like wind and solar rather than fossil fuels, that could mean no greenhouse gases would be released at all.
And that would be a big deal. Cement forms the foundation of the modern economy, both literally and metaphorically.
It is what binds the sand and aggregate in concrete together, and concrete is the most widely used material on the planet after water.
If cement was a country, it would be the third biggest source of emissions after China and the US, responsible for 7.5% of human-made CO2.
This article shows how by applying chemical magic to two effectively unrelated processes; the recycling of steel and the recycling of concrete to make new cement, very high rewards are possible.
Cambridge University are calling their new product electric cement.
As large amounts of electricity are used in an arc furnace, to produce the two products
These paragraphs outline the innovative Cambridge process.
Cement is made by heating limestone to up 1600 Celsius in giant kilns powered by fossil fuels.
Those emissions are just the start. The heat is used to drive carbon dioxide from the limestone, leaving a residue of cement.
Add both these sources of pollution together and it is estimated that about a tonne of carbon dioxide is produced for every tonne of cement.
The team of scientists,, has found a neat way to sidestep those emissions.
It exploits the fact that you can reactivate used cement by exposing it to high temperatures again.
The chemistry is well-established, and it has been done at scale in cement kilns.
The breakthrough is to prove it can be done by piggybacking on the heat generated by another heavy industry – steel recycling.
When you recycle steel, you add chemicals that float on the surface of the molten metal to prevent it reacting with the air and creating impurities. This is known as slag.
The Cambridge team spotted the composition of used cement is almost exactly the same as the slag used in electric arc furnaces.
They have been trialling the process at a small-scale electric arc furnace at the Materials Processing Institute in Middlesbrough.
These are my thoughts.
The Only Inputs Are Steel Scrap, Green Electricity And Used Cement
Consider.
- We probably need to increase the percentage of steel scrap we collect.
- Gigawatts of green electricity in a few years, will be available in those places like Port of Ardersier, Port Talbot, Scunthorpe and Teesside, where large amounts of steel will be needed.
- I can envisage large steel users having their own hybrid electric cement/electric arc furnace plants.
- Used cement would be collected and brought to the plants.
- Years ago, I used to live next door to an old World War II airfield. The farmer who owned the airfield, told me, that the concrete was his pension, as when he needed money, he called a company, who crushed it up for aggregate.
I can see a whole new integrated industry being created.
Conclusion
This could be one of the best inventions since sliced bread.
Redevelopment Of Scottish Port Begins As Owner Secures GBP 400 Million For Offshore Wind Upgrade
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
Haventus, the owner of the Ardersier Port in the Moray Firth, Scotland, has taken a final investment decision and kicked off construction work on redeveloping the port to serve both fixed-bottom and floating offshore wind projects. The revamped port is expected to open in the second half of 2025.
These are the first two paragraphs.
This month, Haventus was granted a GBP 100 million (approximately 117 million) joint credit facility from the Scottish National Investment Bank and UK Infrastructure Bank with GBP 50 million (approx. EUR 58.5 million) investment from each.
This follows a GBP 300 million (approx. 351 million) investment commitment by the energy investment firm Quantum Capital Group in 2023 when Haventus began the redevelopment of Ardersier Port.
This page on the Haventus web site, gives more details of the Port of Ardersier.
Included are.
- Access channel width – 160 m.
- Access channel depth – 12.4 m.
- Landside area – 350 acres.
- 420m main quay.
- 80 m Ro/Ro capable berth.
- People-friendly midges
- Green Freeport tax site designation
- More space is available if required.
There is also an informative video.
Haventus say they are delivering a world-leading energy transition facility. I can go along with that!
These are my thoughts.
The Location Of The Port of Ardersier
This Google Map shows the location of the Port of Ardersier.
Note.
- The large expanse of water in the middle of the map is Moray Firth.
- The blue arrow at the bottom of the map indicates Inverness Airport.
- Inverness Airport, has a railway station on the Aberdeen and Inverness Line.
- The village of Ardersier is on the the Eastern bank of the Moray Firth
- The Port of Ardersier is in the North-East corner of the map.
The city of Inverness, with a population of around 48,000, is a few miles South-West of the South-West corner of the map.
Which Windfarms Will Be Built And Serviced From The Port Of Ardersier?
This map shows the various ScotWind leases, around the North of Scotland.
The numbers are Scotwind’s lease number in their documents.
These are the Scotwind wind farms to the North-East of Scotland, that could reasonably be assumed to be built and served from the Port of Ardersier.
- 7 – DEME Concessions Wind – 200 km² – 1.0 GW – Floating
- 8 – Falck Renewables Wind – 256 km² – 1.0 GW – Floating
- 9 – Ocean Winds – 429 km² – 1.0 GW – Fixed
- 10 – Falck Renewables Wind – 134 km² – 0.5 GW – Floating
- 11 – Scottish Power Renewables – 684 km² – 3.0 GW – Floating
- 12 – BayWa r.e. UK – 330 km² – 1.0 GW – Floating
These are the Scotwind wind farms to the North-West of Scotland, that could reasonably be assumed to be built and served from the Port of Ardersier.
- 13 – Offshore Wind Power – 657 km² – 2.0 GW – Fixed or Floating
- 14 – Northland Power – 390 km² – 1.5 GW – Floating
- 15 – Magnora – 103 km² – 0.5 GW – Floating
- 16 – Northland Power – 161 km² – 0.8 GW – Floating
These ten wind farms add up to 12.3 GW.
Transport
Consider.
- Obviously, heavy components will be brought in by sea, using the Ro/Ro capable berth or using a crane to unload a barge.
- Personnel will be able to fly in for the day.
- Will some visitors rom London use the Caledonian Sleeper to and from Inverness station to get a full day on site and a good night’s sleep, whilst travelling.
But I do see a problem with local traffic to and from the site.
Hydrogen Buses
This page on the Sizewell C web site, discusses how they will use hydrogen buses.
I could see the Port of Ardersier taking a leaf out of Sizewell C’s book and run hydrogen buses to Inverness, Inverness Airport and other nearby towns.
The North of Scotland certainly won’t be short of green hydrogen to power the buses.
Hydrogen
Conclusion
If you thought that the only useful wind-driven thing to come out of Scotland was bagpipes, you had better think again.
The Port of Ardersier will be the factory and operation and maintenance port for one of the largest offshore wind industries in the world.
BW Ideol Unveils Mass Production-Ready Floating Wind Foundation
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
France-based BW Ideol has unveiled its standardised floating foundation product and a blueprint for mass production that could drive costs down across projects.
This is the first paragraph.
With over 22 GW already awarded in Scotland, around 8 GW in the US, and several GW currently being awarded or in the tendering phase elsewhere in the world, the floating wind is now entering an industrialization phase, said BW Ideol.
It looks like the French have come up with a solution that’s needed.
These are previous posts about BW Ideol.
- BW Ideol And Holcim To Explore Use of Low-Carbon Concrete In Floating Offshore Wind
- BW Ideol, ABP To Explore Serial Production Of Floating Wind Foundations At Port Talbot
There is also this video of proposed serial production of BW Ideol floaters at the Port of Ardersier.
This Google Map show the area of Scotland to the North-East of Inverness Airport.
Note.
- Inverness Airport indicated by the red arrow.
- Ardersier village in the middle of the map on the bay.
- Fort George is at the North end of the bay.
The Port of Ardersier is the large slab of concrete in the North-East corner of the map, the Carse of Ardersier marked below it.
BW Ideol are claimining they can build one floater a week or one GW a year.
BW Ideol And Holcim To Explore Use of Low-Carbon Concrete In Floating Offshore Wind
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
BW Ideol and Holcim have signed a Memorandum of Understanding (MoU) for a feasibility study on supplying beneficial low-carbon concrete for the floating offshore wind industry, with particular reference to Scotland.
These are the first three paragraphs.
BW Ideol and Holcim aim to collaborate on optimising the supply of the innovative concrete needed for the intended mass production of BW Ideol’s floaters in the Port of Ardersier.
Low-carbon concrete’s advantages as a building material for offshore wind farms include its durability in marine environments, its local availability and its comparatively lower carbon emissions, the companies said.
The collaboration includes developing specific durable maritime low-carbon concrete mixes with enhanced mechanical performance perfectly suited to slipform application.
This is surely a good development.
The Anonymous Widower 