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David T. Kearns
Australia
เข้าร่วมเมื่อ 30 มี.ค. 2014
Some commentary and #WithASharpie videos by David T. Kearns (Principal, Sustainable Services and Sustainable Data co-founder) on topics like energy, carbon, Big Data, Machine Learning and industrial technology.
Biodiesel from microalgae
My first #WithASharpie video for 2019. It's the next video in my #CleanTechSeries, this time on making biodiesel from microalgae.
Biofuels offer a tempting alternative to fuels derived from crude oil. However, they have traditionally struggled due to a conflict between land and water used for food crops and that used for fuel crops.
An alternative is making biofuels from microalgae. Microalgae can be grown in many locations not suitable for agriculture, with marginal water, and in remote locations.
This video explains how biodiesel can be cultivated, harvested and manufactured from microalgae.
Biofuels offer a tempting alternative to fuels derived from crude oil. However, they have traditionally struggled due to a conflict between land and water used for food crops and that used for fuel crops.
An alternative is making biofuels from microalgae. Microalgae can be grown in many locations not suitable for agriculture, with marginal water, and in remote locations.
This video explains how biodiesel can be cultivated, harvested and manufactured from microalgae.
มุมมอง: 38 308
วีดีโอ
Solar Cells
มุมมอง 1075 ปีที่แล้ว
First video in my #cleantechseries of videos on how various new energy technologies work.
Modelling systems Part 2
มุมมอง 715 ปีที่แล้ว
Machine Learning (part of AI) is a new way to model complex systems. This second part of a 2-part series explains about conventional vs Machine Learning modelling.
Modelling systems Part 1
มุมมอง 945 ปีที่แล้ว
Machine Learning (part of AI) is a new way to model complex systems. This first part of a 2-part series explains about conventional vs Machine Learning modelling.
Carbon Capture and Storage - Part 3
มุมมอง 2.8K5 ปีที่แล้ว
A commentary on some available options to store CO2 after it's captured (see Parts 1 and 2 for capture videos).
Carbon Capture and Storage - Part 2
มุมมอง 4.7K5 ปีที่แล้ว
Second video in a #WithASharpie series on Carbon Capture and Storage (CCS). This video goes over the three main ways that carbon capture is done: post-combustion capture, pre-combustion capture and oxyfuels. All are intended to produce a high purity CO2 stream following successful fuel combustion for energy.
Carbon Capture and Storage - Part 1
มุมมอง 1.8K5 ปีที่แล้ว
First in a series of #WithASharpie videos on Carbon Capture and Storage (CCS). This video spells out the problem that carbon capture and storage is intended to solve.
Energy overview Part 3
มุมมอง 805 ปีที่แล้ว
In this third part of my three-part Energy Overview, I make the case for widespread adoption of hydrogen as an equal-status energy carrier to electricity.
Energy overview Part 2
มุมมอง 555 ปีที่แล้ว
In this second part of my three-part Energy Overview, I outline the different uses of energy carriers in our economies. This sets the stage for part 3, where I see a big role for hydrogen as the dominant chemical energy carrier, working hand-in-hand with electricity to power our future industries.
Energy overview Part 1
มุมมอง 1675 ปีที่แล้ว
A high level overview of the modern economy's sources and uses of energy, as well as introduction of the concept of an energy carrier. (Apologies that I forgot to include coal power stations on this diagram. Just imagine another box (labelled coal PS) to the left of the nuclear PS, connecting coal to electricity).
Hydrogen
มุมมอง 4635 ปีที่แล้ว
Another #WithASharpie video. Here I talk about the three main technologies used to make hydrogen gas - water splitting (electrolysis), steam reforming of methane, and coal gasification
Fuel cells
มุมมอง 1635 ปีที่แล้ว
This #WithASharpie video explains what a fuel cell is, why they can be much more efficient than conventional thermal power generation, and some advantages and disadvantages.
Why do power stations throw away heat?
มุมมอง 585 ปีที่แล้ว
I was asked online recently: why do (thermal) power stations throw away so much heat? You've probably seen pictures of large coal- or gas-fired power stations with big plumes of water vapour coming out of their cooling towers. Why do we throw all that heat away? Isn't that a waste? Here I briefly step through the reason we can't convert all the heat from a fuel into work (electricity).
Correcting activity data in carbon/environmental reporting
มุมมอง 325 ปีที่แล้ว
A brief tutorial on how to use instrument calibration data (As-found and As-left percentages) to make your carbon or environmental reporting activity data more accurate.
Is it possible to use the same or similar catalyst molecules to crack this bi oil to make gas ??
Very informative. Thank you
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?
we need to fill the water in raceway pond oftenly right? Because the water will be evaporated pretty quickly
Yes that's right. Having access to a nearby supply of water is essential for this reason
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
Awesome explained David....good wishes to u🎉🎉🎉🎉
Explained so clearly, thank you!
Great video, David! Thanks so much for producing this terrific series. Keep up the great work!
Thanks!
How do you solve the oxidation issue with Biodiesel. Can you reduce the oxidation of Biodiesel completely.
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).
Where are you based David? Do you know of any of the proposed biorefineries which offer transesterification in Australia?
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
@@davidt.kearns3200 working with a couple of potential algae to biofuels projects coming here.Are you on linked in?
@@authorlukegracias1134 yes I am. Just look me up under David T. Kearns in Melbourne
Please make a video on different types of capture techniques (solvents, cryo, etc)
How is recarbonating clinker sustainable? Isn’t that just wasting the clinker by returning it to limestone state?
cheers David, great vid
what catalysts can i use for the conversion?
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.
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!
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.
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?
Hocam merhabalar bende yosun yetiştirmek istiyorum bu konu ile ilgili nerden bilgi alabilirim şimdiden çok teşekkür ederim kolay gelsin
What is the price of 1L of diesel in AU now?
I wish you had included more numbers, such as the cost of dewatering or cultivation. Great video nonetheless!
Yeah this ideal for carbon, we diversify it.. Any many things
Please make a video on oil extraction process which is very important to make biodiesel from algae
that's fascinating, thank you for clarifying this topic
Actually, the oxyfuel method is very useful a industries that use a lot energy to produce the final such as cement plant.
Thank you the picture is clear now 👍
Big thank to you it's really helpful ❤
Thank you so much ❤
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!
Brilliant!
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!
U dont get a "green" product and compete by price, u find a niche. But still, best explanatuon i found, thank you.
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)
what about wet scrubbing co2 out of air. I would like an explanation for that.
Well explained! Thanks a lot for all your efforts and looking forward for more greater videos from you. Regards from Sri Lanka🇱🇰
GREAT JOB! Loved the way you made it so simple to understand. Make more videos!!!
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
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.
Wow that was really good man. Thanks.
Fantastic overview, very clearly "dumbed-down". Thanks!
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 🇮🇳
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
Please 🙏 sir
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?
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!
How to production biodiesel from rhodotorula glutins. Can u explain the method
Hi thank you for making your clean tech videos, I'm finding them really useful, could you maybe do wind next?
great video, thanks
UF system is the best. Methanol is not a catalyst.
Can you please tell me which species of algae is useful and what will the production rate of algae in photo bioreactor?
You can use spirulina. But it needs to be fed with KNO3 because it produces a lot of proteins.
Very well explained.
Well explained.. thanks