Видео

Welcome! 👋

We are in Newcastle, Australia. 🇦🇺 So it is $2 AUD! 🙂

Hi 👋 You can learn more information about our Master of Construction Management (Professional), here: www.newcastle.edu.au/degrees/master-of-construction-management-professional

If I do master of construction management, is it pr leading course?

Hi there, this student is studying Coastal and Marine Science and chose to visit Tioman Island for one of their courses. We have lots of global experiences on offer at our University! To learn more about this degree, check out our website here: www.newcastle.edu.au/degrees/bachelor-of-coastal-and-marine-science

@ thank you!!

Electricity can come from a variety of sources, some of them more sustainable than others.

Dr Jess is talking about using renewable energy from sources like solar power for the electricity ☀️

It's a good question. Generally speaking, trees are carbon neutral. That means they aren't REALLY taking or adding carbon. The trees absorbs carbon as it grows, it releases carbon as it decays and dies. New trees absorb, die, rinse and repeat. In reality, some of that is buried into the ground and not released and theoretically carbon would be slowly sapped from the cycle until something introduces more. So what you need isn't planting more trees (which just temporarily holds carbon), what you need is to put the carbon back where you found it (in the ground). Not as easy as it was taking it out of the ground.

We need many things happening at once to offset CO2! Planting more trees is definitely a part of that 🌳

@@universityofnewcastle I agree that letting nature reclaim a lot of its territory would be good. Not for CO2 levels, but definitely for biodiversity and possibly climate redirection (or sustenance). Trees do a good job retaining water and have a big affect on the local biome.

She's explaining basic chemistry. You don't usually call things by household names, and instead use chemical formulas. Ex: HCl, hydrochloric acid, is normally sold as Muriatic acid in the US.

Dr Jess is brilliant, indeed! 🙌

Adding carbon as a fuel to separate the iron from the oxide does not make steel. It makes Iron and Carbon Dioxide gas. This method involves using electrolysis to separate the iron from the oxygen, which is released as pure oxygen gas. (O2)

The oxide from the ore is reacted at the anode to generate oxygen gas directly as the only by-product! 🧪

Somebody has to save the planet. especially now that the US has handed the EPA over to a big business shill.

We're excited to see where Dr Jess will take her research!

gg

Obviously they would use renewable energy like wind and solar, like she said in the video. Australia's grid is already 40% renewables.

Agreed today, but the difference is that grids can be moved away from fossil fuels, but coal is always coal. Australia in particular I think has lots of renewable energy, but could be wrong.

High Carbon Steel has a carbon content in the range of 0.30-1.70% by weight.

You don't!

CO2 is being used now so don't produce more. It's like y=0.5x+4 (Solar panels) vs y=x+2 (Keep on using fossil fuels).

You only need to produce those solar panels once. That's kinda the point of reusable energy sources.

Not just heating it up. By running an electric current through an ionised mixture, in this case molten Fe2O3, the electrons from the current bind to the Fe+ ions, causing it to coalesce at the cathode (negative electron)in the form of molten iron, and the oxygen sheds its extra electrons to form O2 gas at the anode. This process is quite energy inefficient, as the ore must be liquid, which requires it to be more than 1,500 degrees Celsius. This can be mitigated slightly through the addition of flux, however. Electrolytic separation of metals with soluble salts is a lot easier, for example, CuSO4, which can be separated in an aqueous solution. Hope this helped.

You're right. A small amount of carbon in the iron does need to be present to make high-quality steel, but this can be added in a later step, at the same time as the other trace metals. This allows more flexibility in what steel is produced, as the manufacturer can dictate whether their product is a high- or low-carbon steel. It also requires significantly less carbon than a regular smelt.

@@SlatelayerTools Yeah, it's exactly what I was thinking of. I just feel like it's super energy inefficient as you said. It will never be an alternative choice to creating steel when it's so much more expensive. It would only be sustainable energy if the electricity provided is solar/wind/hydro based. None of which seems too feasible. This is without considering flux, salt or other chemicals necessary. It's so expensive that it will never be a thing.

It's not necessarily energy inefficient. It probably is practically, but so is coal. That's why they do research like this to find a good way to do it

Hi 👋Dr Jess says the oxide from the ore is reacted at the anode to generate oxygen gas directly as the only by-product! 🧪

The extra oxygen reacts with another extra oxygen to make a third O2. 2 Fe2O3 -> 4 Fe + 3 O2

@@Kernith2 Someone paid attention in Chemistry!

@@JFitable even got a PhD in it 👨‍🏫

The second one if I recall - Adding electricity disrupts the electrons, which could unbind the molecule Fe2O3 into just the Fe and O2 (or maybe O3, I don't know if it reverts back to normal oxygen or ozone)

Er yes, they specify it reverts to O2, normal oxygen, in the video

Sand and coal works based on heat. Sand and electricity works based in how the electricity interacts with the atoms

Hi there, you can take a look at our Medical Radiation Lab here: ruclips.net/video/lYylrdDRkxo/видео.htmlsi=QA8MAexBISrF8B-L