I can’t quite get my head around the round trip efficiencies at play here.
Electrolysing hydrogen (~40% at best) followed by further processing into methanol, transportation, followed by burning the product in an ICE? Wouldn’t surprise me if this is below 5% round trip energy to the wheels.
And then, scaling this up, we have to recognise that the reality of hydrogen production as it is now is fossil fuel derived…
Seems to me that if your goal is reducing CO2 emitted into the atmosphere, that green hydrogen feedstock could be put to better use elsewhere (such as in steel making) for the time being.
It's also explained in literally the second paragraph.
"Which is why I'm a little excited about a collaboration between Porsche and Siemens to do just that. As we reported earlier this year, Porsche and Siemens are developing a low-carbon synthetic fuel that combines green hydrogen (produced by wind-powered electrolysis) with carbon dioxide (filtered from the atmosphere) to form methane, which is in turn then turned into gasoline."
None of that is what I asked. How is the synthetic gasoline different when it's burned?
carbon dioxide (filtered from the atmosphere)
I can’t quite get my head around the round trip efficiencies at play here.
Electrolysing hydrogen (~40% at best) followed by further processing into methanol, transportation, followed by burning the product in an ICE? Wouldn’t surprise me if this is below 5% round trip energy to the wheels.
And then, scaling this up, we have to recognise that the reality of hydrogen production as it is now is fossil fuel derived…
Seems to me that if your goal is reducing CO2 emitted into the atmosphere, that green hydrogen feedstock could be put to better use elsewhere (such as in steel making) for the time being.
I suspect the reason this is in Punta Arenas is it’s a long way from, well, anywhere at all really. There’s lots of wind energy, but transport is the bottleneck. Absent a fleet of hydrogen supertankers, there’s a certain value in converting the excess wind energy into a fuel that can be easily transported elsewhere.
There might be an argument for building a steel plant or aluminium smelter there, but you would still have to transport raw materials there and finished product away, whereas the raw materials for synfuel are ubiquitous.
This is the future as there are many places that are rich in potential green energy but too remote to transport it for consumers.
It's also explained in literally the second paragraph.
"Which is why I'm a little excited about a collaboration between Porsche and Siemens to do just that. As we reported earlier this year, Porsche and Siemens are developing a low-carbon synthetic fuel that combines green hydrogen (produced by wind-powered electrolysis) with carbon dioxide (filtered from the atmosphere) to form methane, which is in turn then turned into gasoline."
None of that is what I asked. How is the synthetic gasoline different when it's burned?
carbon dioxide (filtered from the atmosphere)
Because the carbon in the fuel was pulled from the air last week. So you are not adding extra carbon to the atmosphere. The life cycle of this fuel adds no carbon to the atmosphere.
How is the carbon pulled from the air? What energy is used for the process?
I can’t quite get my head around the round trip efficiencies at play here.
Electrolysing hydrogen (~40% at best) followed by further processing into methanol, transportation, followed by burning the product in an ICE? Wouldn’t surprise me if this is below 5% round trip energy to the wheels.
And then, scaling this up, we have to recognise that the reality of hydrogen production as it is now is fossil fuel derived…
Seems to me that if your goal is reducing CO2 emitted into the atmosphere, that green hydrogen feedstock could be put to better use elsewhere (such as in steel making) for the time being.
I can’t quite get my head around the round trip efficiencies at play here.
Electrolysing hydrogen (~40% at best) followed by further processing into methanol, transportation, followed by burning the product in an ICE? Wouldn’t surprise me if this is below 5% round trip energy to the wheels.
Not to forget storage, transport, taxes ... and the fact that early price estimates are usually pretty optimistic.Well, the inputs to this process is .. air and water. Air as wind to turn the turbine and as a source of the carbon dioxide, and water as an input to the electrolysis cell. So there's no other place for the costs to go apart from building the plant.Any thoughts on how scalable this technology is? Because the US consumed about 123 billion gallons of gasoline in 2020.
Also, does the $7.6 per gallon include the cost of building the plant, or just the cost of producing the gasoline once you've built the plant?
One real problem: even powered by solar and wind, this stuff will be really expensive. IMO, this kind of plant will never sell much gas for use in cars. Pricing will never be competitive. People will switch to electric cars before they'll pay for synthgas. Instead, any output from plants like this will go to industries that absolutely require maximum energy density, like aviation, and only in a scenario where fossil fuels are unavailable.
I'm not entirely convinced. Today, green energy is well under 20% of worldwide production. As long as we don't literally have green energy to burn, wouldn't it be much more efficient if Porsche and Siemens just built windmills feeding into the net - offsetting the carbon emitted by racecars and (future) classics? There is no escaping the low effciency of electrolysis
It's also explained in literally the second paragraph.
"Which is why I'm a little excited about a collaboration between Porsche and Siemens to do just that. As we reported earlier this year, Porsche and Siemens are developing a low-carbon synthetic fuel that combines green hydrogen (produced by wind-powered electrolysis) with carbon dioxide (filtered from the atmosphere) to form methane, which is in turn then turned into gasoline."
None of that is what I asked. How is the synthetic gasoline different when it's burned?
carbon dioxide (filtered from the atmosphere)
Because the carbon in the fuel was pulled from the air last week. So you are not adding extra carbon to the atmosphere. The life cycle of this fuel adds no carbon to the atmosphere.
How is the carbon pulled from the air? What energy is used for the process?
You're just trolling at this point.
It's literally what the entire goddamn article is about.
I'd call you stupid, but you're probably being malicious.
No, I'm really not. You are making an obviously dubious claim that making gasoline from present rather than ancient organisms is somehow beneficial. You are very vague, and get angry when asked for details.
And you're a concern troll. And based on your comments on other controversial threads I can't help but think you're more interested in sowing FUD and division than actual, useful discussion. Almost like you're being paid by a power hostile to the stability of the West to do so...
I'm not entirely convinced. Today, green energy is well under 20% of worldwide production. As long as we don't literally have green energy to burn, wouldn't it be much more efficient if Porsche and Siemens just built windmills feeding into the net - offsetting the carbon emitted by racecars and (future) classics? There is no escaping the low effciency of electrolysis
They pay taxes in Germany, and the taxes subsidise other Germans to build windmills feeding into the net. This is in addition to that.
The US Navy has been working on something similar using seawater and electricity to make aviation kerosene. Nuclear aircraft carriers have lots of electricity, especially the Ford Class, and if they get it to work it'll reduce the need for underway replenishment for jet fuel.
Edit: Aviation is one place where liquid fuels are going nowhere and systems like in this article will probably produce an aviation kerosene analogue for decades after other industries have gone electric. I mean, hell, AvGas still has lead in it.
Ok, but if they do this in addition as you say, it still is it more efficient to feed (Porsche/Siemens) windmill power directly into the net - this is more directed at giving the petrolhead something to feel good about, and not about finding the best solution, imho.
I can’t quite get my head around the round trip efficiencies at play here.
Electrolysing hydrogen (~40% at best) followed by further processing into methanol, transportation, followed by burning the product in an ICE? Wouldn’t surprise me if this is below 5% round trip energy to the wheels.
I am sure the round trip efficiency is not that great, but your initial condition for electrolysing water is wrong. The efficiency now is about 80% and expected to rise a few points or 5 over the next few years.
https://en.m.wikipedia.org/wiki/Electrolysis_of_water.
I can’t quite get my head around the round trip efficiencies at play here.
Electrolysing hydrogen (~40% at best) followed by further processing into methanol, transportation, followed by burning the product in an ICE? Wouldn’t surprise me if this is below 5% round trip energy to the wheels.
I am sure the round trip efficiency is not that great, but your initial condition for electrolysing water is wrong. The efficiency now is about 80% and expected to rise a few points or 5 over the next few years.
https://en.m.wikipedia.org/wiki/Electrolysis_of_water.
Well, the initial step may be more efficient. But let's not forget that fuel cells arrive at a total efficiency of 1/3 that of a BEV.
Now, fuel cell hydrogen needs to be pressurized / liquified, so that step is not not needed. But the conversion from hydrogen to usable electric energy is quite efficient again.
But here you use the hydrogen to convert carbon dioxide into fuel (with carbon dioxide being a rather stable molecule that should be energy intensive as well), plus, at the end you're simply combusting the fuel.
And we all know that combustion engines are not the most efficient way of getting something to move.
So all in all, I'm rather dubious on the real economics behind all of this.
Might make sense for aviation or ships. But cars? Nope.
Liquid fuel is still much easier to store, and much faster to refill (less than a minute for a tank, less than an hour for a fraction of a battery)I'm not a car person, so I know why I'm not excited by what seems to me a weak excuse to continue internal combustion engines.
Airbus is far from betting the farm on hydrogen. They're betting they can get grants to study hydrogen aircraft and their part of the funding will pay off in good PR.The US Navy has been working on something similar using seawater and electricity to make aviation kerosene. Nuclear aircraft carriers have lots of electricity, especially the Ford Class, and if they get it to work it'll reduce the need for underway replenishment for jet fuel.
Edit: Aviation is one place where liquid fuels are going nowhere and systems like in this article will probably produce an aviation kerosene analogue for decades after other industries have gone electric. I mean, hell, AvGas still has lead in it.
Indeed (regarding liquid fuel energy storage in aviation).
One of risky plans to decarbonize passenger transport is to convert to hydrogen (Airbus seems to betting the farm on it https://www.airbus.com/innovation/zero- ... zeroe.html.)
It’s risky because
1) it requires complete re-engineering of airplane and ground support fuel systems since liquid hydrogen requires high pressure cryogenic storage (not to mention you cannot use gaskets of any kind for plumbing, and you need to expend energy to refrigerate)
2) due to low energy density, airplane designs have to be revamped to carry a much larger volume of fuel for the same distance travelled
3) it requires expending energy to scrap and rebuild the whole fleet of airplanes eventually
It is so outlandish that I’ve suspected it to be a plot to monopolize the market (build a technology that everyone else will avoid because it makes no financial sense, then push government to make it a requirement, thus driving everyone else out of business).
Synthetic fuel seems like a much more logical path, and work like that in the article will for sure affect aviation future plans.
The practical solution to dealing with large-scale use of internal combustion engines is to get rid of basically all of them, which we'll do anyway over the next 20 years, and replace them with batteries.I'm not a car person, so I know why I'm not excited by what seems to me a weak excuse to continue internal combustion engines.
Did you miss all the parts about pre-existing cars that are almost entirely based around petrol engines?
They need a practical solution, not the day dream solution of getting rid of them all. Porsche have a practical solution, which is fantastic.
Porsche have a highly impractical solution that will only solve some niche uses for gasoline.
The same set of processes solves a non-niche when it comes to making kerosene though, which would be useful in aviation and shipping.
It's also explained in literally the second paragraph.
"Which is why I'm a little excited about a collaboration between Porsche and Siemens to do just that. As we reported earlier this year, Porsche and Siemens are developing a low-carbon synthetic fuel that combines green hydrogen (produced by wind-powered electrolysis) with carbon dioxide (filtered from the atmosphere) to form methane, which is in turn then turned into gasoline."
None of that is what I asked. How is the synthetic gasoline different when it's burned?
carbon dioxide (filtered from the atmosphere)
Because the carbon in the fuel was pulled from the air last week. So you are not adding extra carbon to the atmosphere. The life cycle of this fuel adds no carbon to the atmosphere.
How is the carbon pulled from the air? What energy is used for the process?
So all in all, I'm rather dubious on the real economics behind all of this.
Might make sense for aviation or ships. But cars? Nope.
Scrubbing CO2 is pretty well understood as an industrial process. There’s no major technical problem; scaling it way up is of course an engineering challenge.It's also explained in literally the second paragraph.
"Which is why I'm a little excited about a collaboration between Porsche and Siemens to do just that. As we reported earlier this year, Porsche and Siemens are developing a low-carbon synthetic fuel that combines green hydrogen (produced by wind-powered electrolysis) with carbon dioxide (filtered from the atmosphere) to form methane, which is in turn then turned into gasoline."
None of that is what I asked. How is the synthetic gasoline different when it's burned?
carbon dioxide (filtered from the atmosphere)
Because the carbon in the fuel was pulled from the air last week. So you are not adding extra carbon to the atmosphere. The life cycle of this fuel adds no carbon to the atmosphere.
How is the carbon pulled from the air? What energy is used for the process?
I'd be curious to know how they do that. I've always heard that it was incredibly difficult due to the low partial pressure of CO2, much harder on Earth than on Mars.
Not to forget storage, transport, taxes ... and the fact that early price estimates are usually pretty optimistic.
I'm not entirely convinced. Today, green energy is well under 20% of worldwide production. As long as we don't literally have green energy to burn, wouldn't it be much more efficient if Porsche and Siemens just built windmills feeding into the net - offsetting the carbon emitted by racecars and (future) classics? There is no escaping the low effciency of electrolysis
They pay taxes in Germany, and the taxes subsidise other Germans to build windmills feeding into the net. This is in addition to that.
Ok, but if they do this in addition as you say, it still is it more efficient to feed (Porsche/Siemens) windmill power directly into the net - this is more directed at giving the petrolhead something to feel good about, and not about finding the best solution, imho.
On Friday, the two organizations broke ground on the Haru Oni manufacturing plant near Punta Arenas in Chile. Assuming all goes to plan, the plant should be able to produce 34,000 gallons (130,000 L) of synthetic fuel in 2022, before scaling up to 14.5 million gallons (55 million L) by 2024 and 145 million gallons (550 million L) by 2026, at a cost of around $7.6 per gallon ($2 per L).
It's clearly an aspirational nth-of-a-kind price, not the price of this pilot project. But your retail price of hydrogen includes all the pumping infrastructure and operations cost to fill your 700-bar tank, which this plant doesn't need -- it can use much lower pressure hydrogen.On Friday, the two organizations broke ground on the Haru Oni manufacturing plant near Punta Arenas in Chile. Assuming all goes to plan, the plant should be able to produce 34,000 gallons (130,000 L) of synthetic fuel in 2022, before scaling up to 14.5 million gallons (55 million L) by 2024 and 145 million gallons (550 million L) by 2026, at a cost of around $7.6 per gallon ($2 per L).
This looks mainly like theoretical pricing to make it look more feasible than it is.
If you look a pump price of Hydrogen, it's typically around $13/KG. And that is mostly cheaper SMR hydrogen.
You would need about a KG of hydrogen if not more, to create a gallon of synthetic fuel (plus much more processing, and energy inputs).
Hard to imagine how $13/KG Hydrogen turns into $7/Gallon liquid fuel without heavy subsidization.
Or the pricing projections are from the same people that claimed Hydrogen would be pumping into cars for $2/KG more than a decade ago...
Pump prices are not manufacturing costs.On Friday, the two organizations broke ground on the Haru Oni manufacturing plant near Punta Arenas in Chile. Assuming all goes to plan, the plant should be able to produce 34,000 gallons (130,000 L) of synthetic fuel in 2022, before scaling up to 14.5 million gallons (55 million L) by 2024 and 145 million gallons (550 million L) by 2026, at a cost of around $7.6 per gallon ($2 per L).
This looks mainly like theoretical pricing to make it look more feasible than it is.
If you look a pump price of Hydrogen, it's typically around $13/KG. And that is mostly cheaper SMR hydrogen.
You would need about a KG of hydrogen if not more, to create a gallon of synthetic fuel (plus much more processing, and energy inputs).
Hard to imagine how $13/KG Hydrogen turns into $7/Gallon liquid fuel without heavy subsidization.
Or the pricing projections are from the same people that claimed Hydrogen would be pumping into cars for $2/KG more than a decade ago...
Pump prices are not manufacturing costs.On Friday, the two organizations broke ground on the Haru Oni manufacturing plant near Punta Arenas in Chile. Assuming all goes to plan, the plant should be able to produce 34,000 gallons (130,000 L) of synthetic fuel in 2022, before scaling up to 14.5 million gallons (55 million L) by 2024 and 145 million gallons (550 million L) by 2026, at a cost of around $7.6 per gallon ($2 per L).
This looks mainly like theoretical pricing to make it look more feasible than it is.
If you look a pump price of Hydrogen, it's typically around $13/KG. And that is mostly cheaper SMR hydrogen.
You would need about a KG of hydrogen if not more, to create a gallon of synthetic fuel (plus much more processing, and energy inputs).
Hard to imagine how $13/KG Hydrogen turns into $7/Gallon liquid fuel without heavy subsidization.
Or the pricing projections are from the same people that claimed Hydrogen would be pumping into cars for $2/KG more than a decade ago...
The DoE estimates $5-6/kg, assuming some conservative electrolyser costs and electricity costs.
I don't know what electrolyser costs are, but I'm pretty sure they're no longer $1500/kW, and electricity from renewables in Chile is at 1-3c/kWh. The DoE was working on 6 or 7c per kWh.
So to weigh in here. I think the ICE enthusiasts and hydrogen haters are both missing the point.
I’m a strong believer (like I suspect most Arsians) that climate change is a clear and present existential threat - and I wish those govts banning new ICE’s would also show backbone and introduce scrapage scheme (such as the UK had 15-20 years ago) to get the bulk of ICE vehicles off the road as soon as possible.
That caveat in place… I am also a driver of a 1960’s classic car that I would love to keep running. As hydrogen combustion won’t be economical (or viable) in my lifetime, I have been keeping an eye on e-fuels with cautious hope. If realised, its a relatively carbon-neutral (or at realistically off-setable) option to keep my car going; I’d be able to look my nephews and nieces in the eye when justifying my hobby. That is definitely worth the extra cost this fuel would inevitably entail.
Saying that… it should be pointed out that the niche market that is me, classic car drivers, and Formula One is between us not enough to justify developing Green-Hydrogen derived e-Fuel. The market is aviation and maritime. Unless there is a shock technological breakthrough in the next decade, it is just not viable to power a jumbo jet or 100,000ton bulk carrier by battery. If the world is to hit its carbon emission targets, these vehicles need an interim technology that uses existing engines and other systems whilst also reducing those industries carbon footprint. E-fuels is one of the few ways of meeting that requirement.
If e-fuels is part of that solution… then fantastic. I’ll pay the increased fuel costs to run my 60’s classic for 200-300 miles a year alongside my modern EV. And if it isn’t, then I will willingly accept that my car will have to become a static antique and curiosity at the back of the garage.
But if e-fuels isn’t the solution, or just another hydrogen fad as a previous commentator put it, then someone has got to explain to me what the alternative is. Because battery technology has not got the heavy lift capacity to facilitate existing volumes of global trade, and I don’t think there are that many people willing to give up their current consumable lifestyle and general level of prosperity.
That that is the long way round of explaining why I am excited about e-fuels