Discover and read the best of Twitter Threads about #gorgon

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🤓 carbon capture & storage has been given a bad rap.

yes, we've wasted $billions trying to graft it on to coal — we absolutely need to give up on that — but it's likely we'll eventually need the technology.

firstly… #CCS+coal:
there are / have been just 3 significant #CCS+coal projects:

1. boundary dam🇨🇦: $1.4bn project captures CO₂ from a 110 MW coal unit (tiny), averaged 0.592Mt/yr since oct 2014 — 40% below design.

25% of the plant's power goes to extracting and compressing the COâ‚‚. Image
2. petra nova🇺🇸: heralded by @JoshFrydenberg in 2017, cost US$1bn to build, captured ~4mtCO₂ before being mothballed this year as was uneconomic.

NRG built a 75MW gas power station to power the CCS project. Image
Read 14 tweets
Ancient Coin of the Day: A bloody gorgeous silver Tetradrachm from Athens, ca. 525 BC. The Obverse shows a Gorgon's head, while the Reverse is a lion in an incuse square. #ACOTD #Athens

Image: ANS 1944.100.24115
A bit late in the day, but I couldn't not share this coin, which comes at an interesting point for Athenian coinage, as ca. 525 BC as Reverse image was included for the first time, which allowed for a dedicated Obverse image: the Gorgon.
Indeed, the tetradrachm itself as a denomination was introduced at this time. Weighing around 17.28g, this was a high denomination coin, one that seems to have been designed for high-value transactions.
Read 8 tweets

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