Search for any green Service

Find green products from around the world in one place

Miners experiment with hydrogen to power giant trucks

Miners experiment with hydrogen to power giant trucks

Mining trucks are monstrous machines that guzzle fuel at a scarcely believable rate.

Weighing 220 tonnes, they can get through 134 litres of diesel every hour.

Little wonder then that mining companies are focusing their attention on these vehicles as the first step to reducing their carbon footprint.

Anglo American, in collaboration with several partners, is retrofitting a mining haul truck with hydrogen power technology.

A first of its kind, the monster mining vehicle is being piloted in Limpopo, South Africa, at the firm’s Mogalakwena platinum mine.

Due to be launched in early 2022, the truck will be hybrid, with a hydrogen fuel cell providing roughly half of the power and a battery pack the other half.

 

Instead of having a tank of diesel that powers the motor, hydrogen enters the fuel cell and mixes with oxygen to create water in a chemical reaction catalysed by platinum, which generates the electricity needed to power the motors that drive the wheels.

It only emits water vapour and the company says it has the potential to reduce on-site diesel emissions by up to 80%.

By rolling out this technology across its global truck fleet, Anglo American says it will be “taking the equivalent of half a million diesel cars off the road”.

 

Mining trucks can get through 134 litres of diesel an hour

 

The trucks also harvest regenerative energy created when driving downhill and braking, which is stored in the battery and extends the range of the vehicle.

Anglo is developing the truck along with partners Engie, NPROXX, First Mode, Williams Advanced Engineering, Ballard, ABB, Nel and Plug Power.

However, reducing the carbon footprint of the mining industry is a formidable task.

The construction sector, which includes mining, accounted for 36% of global final energy use and 39% of energy-related CO2 emissions in 2017, according to Davide Sabbadin, senior policy officer for climate and circular economy at the European Environmental Bureau (EEB).

He says the sector will need to reduce its energy consumption by a third if it hopes to be compatible with the Paris Agreement.

Hydrogen-powered trucks are a good start but need closer inspection, says Diego Marin, associate policy officer for environmental justice at the EEB.

“While electric-powered vehicles, generally speaking, are less damaging to the environment than internal combustion engines on a life cycle analysis, this does not mean that they are green,” he says.

Mr Marin points out it all hinges on how the hydrogen is produced. Some hydrogen is created using fossil fuels, which of course means there are substantial emissions as a result.

 

Hydrogen is not the cure-all for mining’s environmental problems, says Davide Sabbadin

 

Anglo American says it is pulling out all the stops in an attempt to attain carbon neutrality by 2040.

Its hydrogen-powered hauler uses green hydrogen, which is made by splitting water atoms into oxygen and hydrogen, through electrolysis.

Even that is treated with caution by the EEB.

“We should refrain from presenting hydrogen as a technological solution to all problems… all forms of hydrogen come at an environmental cost – water use, impacts on nature,” says Mr Sabbadin.

The EEB also points out that hydrogen power has a shorter storage life than other renewables and is substantially more expensive to produce.

 

Whether it be investment for the mining industry’s green goals or hydrogen power as a broader power solution, the issue of cost is definitely a pertinent one in South Africa.

Jarrad Wright, an energy consultant and principal engineer for the Council for Scientific and Industrial Research (CSIR) explains.

“Hydrogen for power production is still quite expensive and unlikely to compete for some time.”

This is largely due to a lack of supporting infrastructure for the new forms of energy to be created, distributed or stored.

But, Mr Wright adds that it is possible to migrate to hydrogen in specific applications.

 

There is a plan to make Mogalakwena mine the centre of a hydrogen production network

 

At the moment South Africa’s hydrogen power infrastructure is still sparse.

But the government and private partners are exploring ways to transform the country’s platinum belt into a “hydrogen valley”, with a focus on producing green hydrogen.

Anglo American is one of the private partners in this hydrogen infrastructure plan, which aims to create a regional renewable energy ecosystem.

The starting point for this ecosystem is due to be built at the Mogalakwena mine itself, through the construction of a hydrogen production and storage complex. It incorporates the largest electrolyser in Africa, a solar power field, and will generate approximately 140MW of green power.

Initially, it will be to support the 24-hour operation of the new truck, but once operational, the aim is for numerous complexes such as this one, to serve as local and regional hubs for the emerging hydrogen economy.

“The ecosystem would not only help us reduce our… emissions, but would also provide the foundation for green hydrogen production, facilitating the roll-out of hydrogen-powered haul trucks across South Africa,” Anglo says.

 


 

Source BBC

Twiggy Forrest sets sights on making the impossible possible when it comes to ‘pure green energy’

Twiggy Forrest sets sights on making the impossible possible when it comes to ‘pure green energy’

In the second half of last year, while most of the world was in pandemic lockdown, Andrew “Twiggy” Forrest and a team of 50 staff did what others couldn’t. He spent five months crisscrossing the globe in a private jet, visiting more than 40 countries.

It set Australia’s second-richest person on a path to an outcome that, if delivered, could transform the energy landscape of not just Australia, but the globe.

The iron ore billionaire says after his private discussions with sovereign leaders, politicians, business people and investors across the world he was convinced of their “genuine thirst for our green energy”.

“It made me strongly, and no longer hesitantly, optimistic,” he told Guardian Australia. “I felt a change in the global mood, a shift in belief, that the impossible could be possible.”

Forrest’s response was to announce in November that his Fortescue Metals Group would aggressively support zero-emissions energy through its new green arm, Fortescue Future Industries.

The initial pledge was that it would back 235 gigawatts of clean energy capacity – more than three times the entire Australian electricity grid – across the globe, with $1bn committed over the next two years. Four months on, that has expanded to a promise to explore more than 500GW of hydro, geothermal, wind and solar with a goal of being involved in the creation of 1,000GW.

 

Forrest estimates the world will need at least 5,000GW of pure green energy to really slow the climate crisis. He has committed himself to helping develop a fifth of that by providing capital, technology and encouragement.

It will, he claims, “create so much momentum and value that consuming energy from a polluting source becomes commercial nonsense”. He has big-name support: the former Australian prime minister, Malcolm Turnbull, has signed on as chairman of the future industries arm, and the ex-Australian Secret Intelligence Service director general, Nick Warner, is a special advisor on international affairs.

“We figure if we are able to set an example of a 1,000GW target then people will realise that the impossible isn’t actually impossible,” Forrest. “We’re hoping that other companies will get in and vigorously compete with us, and maybe even challenge and beat us, but what will happen in that process is global warming will slow and eventually stop. That’s our mission.”

It is a pledge that sits alongside – and in some cases outstrips – support for fixing the climate crisis from some of the world’s richest people, including Elon Musk and Jeff Bezos. Like some of their commitments, it has drawn widespread praise for the agenda-setting and potentially transformative role it could play – and a fair dose of scepticism about whether it is possible.

Forrest’s green ambition is too vast to quickly summarise. In addition to the global push, which he says has already led to deals in 17 countries, FMG this month set a domestic target of reaching net zero emissions by 2030, a decade earlier than it had previously promised, and 20 years before most competitors.

Underpinning it is Forrest’s belief that green hydrogen, created using renewable energy, will change energy systems much faster than some analysts believe is possible. From there, he says, it can be used to create zero-emissions liquid green ammonia and turn iron ore into the holy grail of “green steel” – made without the current reliance on coking coal.

 

Some of his goals will be tested in the short-term. In a speech to a Credit Suisse investment conference on Wednesday, Forrest said that by 30 June this year the company will have developed a green iron ore train that either runs on renewable electricity or a combustion engine powered by green ammonia.

It also plans to be trialling a ship run on green ammonia, a shift that could lead to the replacement of the notoriously dirty bunker fuel currently used by fleets across the globe. Forrest says the pace of what he is proposing on shipping surprised and impressed the climate activist and former US vice-president, Al Gore, and puts him at least five years ahead of the global competition.

Dan Gocher, from shareholder activists the Australasian Centre for Corporate Responsibility, is among those impressed. He says Forrest’s vision for FMG is “literally decades ahead” of other major companies.

“They’re clearly the leading company on the Australian Stock Exchange in terms of ambition – and probably globally,” he said. “What he’s saying is what we’ve been calling on BHP and Rio [Tinto] to commit to – heavy investment in renewables to really kickstart the green hydrogen economy.”

While his focus is on a green future, Forrest has not completely abandoned fossil fuels – at least not yet. This week, he was also speaking with the federal and New South Wales energy ministers, Angus Taylor and Matt Kean, about a proposal by his private company, Squadron Energy, to build a new 635-megawatt gas-fired power station at Port Kembla.

If approved, it would initially run on liquefied natural gas (LNG) brought in via a new floating gas import terminal at the port. Forrest stresses both the plant and the terminal would be “dual-fuel” – a more expensive option that would give them the capacity to use green hydrogen once it is ready – but says he is making “an allowance for natural gas as a critical stepping-stone” to get the developments moving.

The continued inclusion of gas in Forrest’s portfolio has drawn criticism. Gocher says it is at odds with Forrest’s green ambition, which he believes FMG has the capacity to deliver.

“It is a bit hypocritical given the language he has used around the climate crisis,” Gocher said.

“He’s clearly saying we need to take action in the next 10 years, but he wants to build a terminal that will supply more gas. It means he’s not talking about electrification [of industry] or trying to reduce [gas] demand, which is what we should be talking about.”

Forrest takes umbrage when asked whether his gas developments are at odds with his climate push.

“If it was just a gas-fired power station and a gas importation system, sure, take me to task,” he said. “But if I’m spending the huge amount of capital to make it dual-fuel – that’s hundreds of millions – and then on the other side of my life [spending] tens of billions to create that green energy and green hydrogen, then the Guardian really has to be responsible, and encourage people to take that big step and build dual-fuel so that they can switch to hydrogen when it’s available.”

While the Morrison government has said it will back a “gas-led recovery” from recession, Forrest believes there is now no justification for leaders to support developments unless they also have the capacity to become zero emissions “when the fuel is available”.

“It might be green electricity, it might be green ammonia, it might be green hydrogen. If you really care for what your citizens want, make sure you’re not building a dinosaur or licensing a dinosaur.”

The bigger question about Forrest’s vision is whether the rise of green hydrogen is as inevitable as he believes.

The nascent technology is now receiving significant support across the globe, and the Morrison government has named it a priority under its low-emissions technology roadmap. But it is still early days – relatively little hydrogen from any source is being produced and less than 1% of that is created using renewable energy.

Tony Wood, the energy program director at the Grattan Institute, is among those who believe that while green hydrogen has a future, its ubiquity in a low-emissions world is not guaranteed. He doesn’t see a future for hydrogen-fuelled electricity, for example.

“There are better ways to produce low-emissions power than with hydrogen and if we could produce low-cost green hydrogen there are better uses for it than electricity,” he said.

 


 

Source The Guardian