David T. Kearns

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@tobioguntunde8614 4 ай бұрын

Awesome

@sachinthamarasinghe1188 5 ай бұрын

Simple but informative vedio.❤

@PwVp 5 ай бұрын

fantastically explained!! Thanks...❤❤❤

@Caffein780 10 ай бұрын

Is it possible to use the same or similar catalyst molecules to crack this bi oil to make gas ??

@pranjalisingh9790 10 ай бұрын

Very informative. Thank you

@tomjcarty Жыл бұрын

What quantities of oil can come from what KG of algae, and how many M2 / m3 of algae is needed to make that amount of algae?

@rennard968 Жыл бұрын

we need to fill the water in raceway pond oftenly right? Because the water will be evaporated pretty quickly

@davidt.kearns3200 Жыл бұрын

Yes that's right. Having access to a nearby supply of water is essential for this reason

@ekbergiw Жыл бұрын

Glycerin can bond with three fatty tails at its alcohol groups. A triglyceride is a glycerin with all three of those groups bonded with one of those tails

@PARI_SONGS Жыл бұрын

Awesome explained David....good wishes to u🎉🎉🎉🎉

@366ronnie Жыл бұрын

Explained so clearly, thank you!

@GreenNeighbour Жыл бұрын

Great video, David! Thanks so much for producing this terrific series. Keep up the great work!

@COORDINATIONPVJUILLET Жыл бұрын

Thanks!

@ajmaeenmahtab8456 Жыл бұрын

How do you solve the oxidation issue with Biodiesel. Can you reduce the oxidation of Biodiesel completely.

@davidt.kearns3200 Жыл бұрын

Great question. Biodiesel oxidative degradation is mainly due to unsaturated fatty acids. This is made worse if stored at higher temperatures, and obviously the presence of oxygen in the air is a contributor. Exposure to sunlight also accelerates oxidative degradation. Prevention measures can include excluding oxygen from the storage tank (e.g. nitrogen blanketing), the addition of oxidation inhibitors, and minimising excessive inventories of the biodiesel (which reduces average storage time, reducing the amount of oxidation that occurs).

@authorlukegracias1134 Жыл бұрын

Where are you based David? Do you know of any of the proposed biorefineries which offer transesterification in Australia?

@davidt.kearns3200 Жыл бұрын

I’m based in Melbourne. You can find quite a few biodiesel manufacturers in Australia with a google search, though as far as I’m aware none uses microalgae as a feedstock for commercial production. There are research projects happening though

@authorlukegracias1134 Жыл бұрын

@@davidt.kearns3200 working with a couple of potential algae to biofuels projects coming here.Are you on linked in?

@davidt.kearns3200 Жыл бұрын

@@authorlukegracias1134 yes I am. Just look me up under David T. Kearns in Melbourne

@frankmedrisch7451 Жыл бұрын

Please make a video on different types of capture techniques (solvents, cryo, etc)

@frankmedrisch7451 Жыл бұрын

How is recarbonating clinker sustainable? Isn’t that just wasting the clinker by returning it to limestone state?

@011981joe Жыл бұрын

cheers David, great vid

@mayonairi 2 жыл бұрын

what catalysts can i use for the conversion?

@matildastanford7019 2 жыл бұрын

Potassium Hydroxide is the best but Sodium Hydroxide will work as well. Typically KOH is mixed into Methanol (or ethanol) which then has the oil at approx 65°c added into reaction vessel. After mixing that and left to separate / settle for 24hrs the glycerol is gently (with a tap at bottom of reaction vessel) removed leaving biodiesel in vessel for washing with water (removed same way as glycerol) *btw the methanol can be distilled out of glycerol solution to reclaim it, the leftover glycerine can also be used. A good youtube chanmel to demonstrate this process is Robert Murray Smith.

@Kiyarose3999 2 жыл бұрын

Actually Algae growers in the US were preparing to scale up for Fuel production 12 years ago, but as one of them said ‘’Then Fracking happened’’ that artificially lowered the price of petroleum, causing the Algae Fuel production to crash. But before the fracking, Algae would of been at a competitive price to fossilised Algae! The Oil. companies made sure it couldn’t take off, cos Fracking are usually run as Ponsi schemes so all the costs are rigged!

@theprodigyfmwm7509 2 жыл бұрын

This video is really good! I love how it shows the permutations that an energy mix can have. I wish a video like this can get more traffic, because it's a clear and pragmatic way of thinking about energy systems. Anyway, I'm happy I got to watch this.

@UberWagen 2 жыл бұрын

This is for biodiesel. From what I understand, you can use the biomass to extract glucose and ferment them via ABE fermentation to refine into butanol which can replace gasoline. Is that correct?

@rodelenz8114 3 ай бұрын

Exactly. Fermentation of the algae biomass with certain yeasts could yield bioethanol. This is another form of biofuel.

@swen6797 3 ай бұрын

@@rodelenz8114 can gasoline engines run 100% bioethanol?

@rodelenz8114 3 ай бұрын

@@swen6797 I don't think so, from what I read about Brazil, they have engines that can run a blend of bioethanol and gasoline. They also have engines that can run on bioethanol.

@swen6797 3 ай бұрын

@@rodelenz8114 so what about the butanol question?

@rodelenz8114 3 ай бұрын

@@swen6797 I think it is similar, there are specific engine modifications that must be made for a "regular petrol engine" to burn bio butanol. Or biobutanol can be blended with regular gasoline and fed to the engine. My thought process is that, when cars were/are developed, the manufacturer has a particular fuel in mind, and they design the engines in that manner. Except the car manufacturers consiously plan for the use of more than one type of fuel, and they then make their engines capable of burning more than one type of fuel. (For example, petrol and bioethanol/butanol).

@abidineraslan9938 2 жыл бұрын

Hocam merhabalar bende yosun yetiştirmek istiyorum bu konu ile ilgili nerden bilgi alabilirim şimdiden çok teşekkür ederim kolay gelsin

@fungus6million 2 жыл бұрын

What is the price of 1L of diesel in AU now?

@joaquimkeloglanian4801 3 жыл бұрын

I wish you had included more numbers, such as the cost of dewatering or cultivation. Great video nonetheless!

@thegamechanger7157 3 жыл бұрын

Yeah this ideal for carbon, we diversify it.. Any many things

@niranjanswain2248 3 жыл бұрын

Please make a video on oil extraction process which is very important to make biodiesel from algae

@matongeh3419 3 жыл бұрын

that's fascinating, thank you for clarifying this topic

@lordtyrion007 3 жыл бұрын

Actually, the oxyfuel method is very useful a industries that use a lot energy to produce the final such as cement plant.

@mawada-ju6ux 3 жыл бұрын

Thank you the picture is clear now 👍

@mawada-ju6ux 3 жыл бұрын

Big thank to you it's really helpful ❤

@mawada-ju6ux 3 жыл бұрын

Thank you so much ❤

@lizzyskelton9791 3 жыл бұрын

Hi David, I loved your video, very clear and easy to understand. I am an energy science student at Otago university in Dunedin and this has been very helpful for my next assignment. Just thought I'd let you know I have checked out your profile you linked to on your account and it looks like you've been doing some awesome work. Thanks heaps for the video, I am excited to watch more!

@vvpsaikalyan320 3 жыл бұрын

Brilliant!

@vvpsaikalyan320 3 жыл бұрын

Sir, I have watched a couple of your videos. I feel that you really have a knack for simplifying things. I decided to watch all of them. Hope to see more of your videos coming in the future too!

@josephbXIX 3 жыл бұрын

U dont get a "green" product and compete by price, u find a niche. But still, best explanatuon i found, thank you.

@colbylacy8651 11 ай бұрын

This is the unfortunate truth. As I’ve progressed in my chemical engineering degree I’ve found that there are green ways to do almost everything, the problem is creating a product or process that is cheap enough to compete with the status quo. While I think it’s extremely important to continue researching these things (hence my career choice), I also recognize that at some point we’re just gonna have to bite the bullet that sustainable alternatives are generally more expensive than finite resources. Fossil fuel products are everywhere though…. It’s hard to find a niche when your competitor has uses in literally every aspect of life. For example, I am currently doing research on bio based surfactants for use in detergents, but frankly the synthetic surfactants just work better (relation being that the hydrocarbons needed to make surfactants and polymers exist naturally, or can be synthesized from biomass, but it’s just much simpler to use petroleum products)

@darshaningale2608 3 жыл бұрын

what about wet scrubbing co2 out of air. I would like an explanation for that.

@maleeshawarnasooriya5336 3 жыл бұрын

Well explained! Thanks a lot for all your efforts and looking forward for more greater videos from you. Regards from Sri Lanka🇱🇰

@angelcarrillo2411 3 жыл бұрын

GREAT JOB! Loved the way you made it so simple to understand. Make more videos!!!

@blessedsam1256 3 жыл бұрын

Thanks so much for the video. Currently am doing a research of biodiesel production using microalgae as a biomass Fortunately, I came across your video. Thanks

@colbylacy8651 11 ай бұрын

Hi, I find myself in the same boat. What did you specifically test with your research? I’ve been struggling to choose what specific aspect of the process to research.

@phillipstarr4582 3 жыл бұрын

Wow that was really good man. Thanks.

@matthieubonnard2702 3 жыл бұрын

Fantastic overview, very clearly "dumbed-down". Thanks!

@ShivinChaudhary 3 жыл бұрын

I’ve never seen such a complex topic being explained so simply! Thanks a ton for this and hope you continue making these videos. Love from India 🇮🇳

@Saadan_0 Жыл бұрын

Hii sir Mai iss year upsc ka paper de raha hu sir mujhe aapki environment and science ki course karni h thodi bahut khud s ki h maine koi coaching nahi li h , ghar s hi preparation kar raha hu financial issue ki wajah s Sir financial issue ki wajah se mai aapka course purchase nahi kar pa raha hu kyunki Mera work abhi band h sirf preparation kar raha hu so please 🙏 sir free mein agar ho to access de de please please please please 🙏🙏 sir

@Saadan_0 Жыл бұрын

Please 🙏 sir

@LauraGonzalez-wv6ht 3 жыл бұрын

Thanks for the very practical video! I'm just left wondering, and maybe you know the answer to this, are metal oxides something we might want/need to deploy for any other technology in the future that could eventually release that captured CO2 back into the atmosphere?

@anekamulgund384 3 жыл бұрын

This is an incredible video!! You did a great job explaining a complex process in an understandable way. Let me know what you think about my video on making a wind turbine if you'd like as well!