marcuslima

9 ms·

1. 31.▲
   by marcuslima 5y ago

   Yes! This is awesome, I saw this a couple weeks back. We're trying to get in touch with Cementa, but it seems Scandinavian holidays are getting in the way so far. Definitely an ideal place for us to start. That plant does 70% or so of
2. 32.▲
   by marcuslima 5y ago

   I love the idea of crowdfunding! Definitely something we'll look into down the line.
3. 33.▲
   by marcuslima 5y ago

   It's actually better, we consumer concetrated brine in our process, so we don't create a high local salinity that disturbs marine life. In fact we're a pretty good fit for a bolt-on to existing RO desalination plants. Let me
4. 34.▲
   by marcuslima 5y ago

   Thanks! Yes it's pretty wild - fully 8% of global emissions!
5. 35.▲
   by marcuslima 5y ago

   Honestly, our biggest problem right now is moving quickly. In the next 6 months our biggest problem will be getting planning permission to stick large pipes into the sea to process large amounts of seawater ;) We don't discharge anythi
6. 36.▲
   by marcuslima 5y ago

   yep!
7. 37.▲
   by marcuslima 5y ago

   Thanks a lot for that! We have very little published at the minute for patent reasons. It's actually pretty neat as we consume the waste brine in the process, so nothing to disturb local marine life as you have issues with at reverse o
8. 38.▲
   by marcuslima 5y ago

   Thanks! Yes that's absolutely true, that could've been more specific. In the modern world almost every house needs concrete for something, at a minimum for the foundations.
9. 39.▲
   by marcuslima 5y ago

   We're actually working on figuring this out. Our current calculations assume we need to process a huge amount of seawater (11,000 tonnes per tonne of CO2), if the CO2 is the limiting factor (2000 umol). However our R&D suggests und
10. 40.▲
    by marcuslima 5y ago

    That estimate of cost to society should tell us something when contrasted with the actual prices being levied right now. Hopefully we'll get closer to that number eventually! Hopefully the US does this: https://news.climate.
11. 41.▲
    by marcuslima 5y ago

    We're competitive at scale. This does require us to hit our CAPEX targets and to capitalize on cheap renewable sources of electricity that are becoming prevalent
12. 42.▲
    by marcuslima 5y ago

    Yes, thanks for clarifying
13. 43.▲
    by marcuslima 5y ago

    Thanks! 1. We are entering the product testing stage with our cement producing parnters in the next few months, so I'll have a better answer for you then. But from a chemical composition point of view, our product is purer than mined l
14. 44.▲
    by marcuslima 5y ago

    The ocean and the atmosphere exist in an equilibrium there is a 'balance' of relative concentration of CO2. Because CO2 can dissolve in water as CO3 and HCO3 the concentration is skewed to a higher concentration in oceans. When we
15. 45.▲
    by marcuslima 5y ago

    Well understood! The ocean is supersaturated in the ocean (ie. there is about 20x more of it dissolved than you would expect). In fact it's the single largest deposit of calcium in the world. Risk of running out is zero. Calcium in the
16. 46.▲
    by marcuslima 5y ago

    They're pretty good too ;)
17. 47.▲
    by marcuslima 5y ago

    Yep, exactly! The world needs CaO for cement. We have a carbon neutral process for making it. It's actually overall negative as not all carbonates we extract are usable in cement production. But as far as cement producers are concerned
18. 48.▲
    by marcuslima 5y ago

    Yeah, that's the core of it. Climeworks absorbs CO2 on their amine solid sorbent surface before releasing it by heating up the sorbent to prepare it for a new round of CO2. That CO2 then needs to be stored somewhere. I'm not famil
19. 49.▲
    by marcuslima 5y ago

    Haha, fair point ;)
20. 50.▲
    by marcuslima 5y ago

    Great thoughts! Our strategy so far has mainly been focused on targeting large producers of cement and glass. We're in the process of signing LOIs here. Agreed that getting scaling right will be the big challenge X Prize is on our rada
21. 51.▲
    by marcuslima 5y ago

    The calcium all comes from dissolved calcium bicarbonate - we trigger precipitation by shifting bicarbonate to carbonate ions, which are insoluble. Essentially we acceelrate the oceanic carbonate cycle
22. 52.▲
    by marcuslima 5y ago

    Thanks! Yeah, we think it will be. But more importantly, the old way isn't a viable option. It's effectively off the table. Sweden has already banned mining of limestone ( https://www.ribaj.com/products/cementa
23. 53.▲
    by marcuslima 5y ago

    Our synthetic limestone will be on par with mined limestone. At scale when accounting for the higher calcium content per tonne and value of carbon we expect to be cheaper even than mined limestone. You hit the nail on the head there. The mo
24. 54.▲
    by marcuslima 5y ago

    Thanks a lot! Stay posted for open roles - we'll be needing to add to our team in the next few months. Thanks for pointing out - will sort this out!
25. 55.▲
    by marcuslima 5y ago

    Haha, definitely. Got any links to Elon Musk? ;)
26. 56.▲
    by marcuslima 5y ago

    Thanks!
27. 57.▲
    by marcuslima 5y ago

    Absolutely! We're in the early stages of developing an idea like this. We're working with a californian construction start-up to reduce embodied carbon in their building materials. We've also thought about working with some b
28. 58.▲
    by marcuslima 5y ago

    Nice catch! I'm orignally from Norway. Heimdal is the norse god of foresight. Something the world needs in buckets when it comes to climate change. Our experience so far has been that the environmental angle has been sufficient to pers
29. 59.▲
    by marcuslima 5y ago

    Haha gotcha, European ETS is on a bit of a tear at the minute. Has risen to ~$70/tonne CO2
30. 60.▲
    by marcuslima 5y ago

    Our current cost per tonne is in the same order of magnitude when including the carbon value from the European ETS. The key success criteria for making large plants profitable will be connecting to cheap electricity at <$50/MWh we&#