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Emily Grubert Profile picture
@emilygrubert
Dec 9, 2019 • 3 tweets • 2 min read • Read on X
Got to hang out in the East Bae this wkd w my friends Njord and Cap’n Bob, plus saw a pickup truck doin a sideshow in my old nbhd. Love u 4eva Deep East <3

Come see me at #AGU19 — here thru Thurs am, talking fossil (tomorrow) and hydro (tues) transitions + GND on Thurs! Image
(The tug’s name is Jeffrey*. We couldn’t figure out the other dredger complex besides the ID em1003, but it didn’t want to hang out anyway.)

*these are all the actual boat names

Meet Njord here: mansonconstruction.com/what-we-do/fle…
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More from @emilygrubert

Emily Grubert Profile picture
Jun 24, 2023
Ok I’m going to live my dream: a living thread of Google reviews of power plants. These are hilarious to me because they are completely unsolicited and often rule. Will post as the spirit moves me…kicking off with —
GERALD GENTLEMAN (Nebraska, coal, 1.5 GW), ⭐️ ⭐️ ⭐️

“I was going to give this place 4 stars, but one of the towers is taller than the other. Why do we need so much electricity here anyway?”
PALO VERDE (Arizona, nuclear, 4 GW), ⭐️ ⭐️ ⭐️ ⭐️ ⭐️

“Good fishing panfish striped bass catfish largemouth bass”
Read 10 tweets
Emily Grubert Profile picture
Mar 21, 2023
On the occasion of the @IPCC_CH Synthesis Report (coincidentally!) -- if you'd like to spend 8 minutes with me on a journey about fossil phaseout & why we need to plan it carefully & righteously (#midtransition), have I ever got a TED talk for you.

go.ted.com/emilygrubert
We need to phase out fossil fuels as fast as possible (faster, tbh, but we live in the world we've created, and there is so much to fight for).

Fossil fuels support ~80% of commercial energy consumption, which means we have an enormous amount of stuff to retire over the next couple of decades, while simultaneously building a replacement system /and/ dealing with worsening climate change effects.

Read 21 tweets
Emily Grubert Profile picture
Feb 24, 2023
🚨new paper🚨 on the water consumption of electrolytic hydrogen 🫧 that I have literally been working on since before modern hydraulic fracturing was a thing

OA here: doi.org/10.1016/j.clpl…

Under deep decarb electrolytic H2 could consume ~15% of today's water for energy
Big headlines:
1) a lot of processes we think we might need for deep decarb (sustainable aviation fuels, various kinds of CDR, hydrogen) might use a LOT of water

(and electrolytic hydrogen is probably on the low end for water intensity of proposed ways to make hydrogen)
2) decarbonization also dewaters the grid (see doi.org/10.1016/j.jhyd…) so we should think about both what the water needs are /now/ and what they would be for a mature industry

this new piece uses NZA and ZCAP scenarios for both H2 production & grid mix projections
Read 9 tweets
Emily Grubert Profile picture
Aug 5, 2022
As many of you know I'm obsessed with physical infrastructure & want to invite you on this journey re: fossil fuel supply chains in a decarb'd future with me.

Basically: examine claims of future small fossil use critically. A lot of these systems have minimum viable scale.
The ("the") neat thing about flow renewables like wind & solar is that they do fuel harvesting & conversion at the same place, with the same equipment.

Not so for fueled systems (e.g., fossil). You need multiple industries, mostly private in the US, to keep operating.
If I have one wind turbine I can just run it or not (ofc there are construction supply chains -- but I'm talking once it's built). If I have one gas plant I need a gas well, a processing plant, pipelines, safety inspectors, reservoir engineers, educational infrastructure...
Read 16 tweets
Emily Grubert Profile picture
Aug 4, 2022
Re: CCS in the IRA
1) emissions cuts model suggests ~1b tons of CO2 sequestered 2024-2031 due to IRA
2) Senate finance committee suggests ~0.04b tons of CO2 claiming 45Q credit 2022-2031 (0.05b if it's all tied to EOR, or 0.3b if EOR & no multiplier)

These cannot both be true.
Plus, the lack of requirement to capture on an entire plant (it's unit only) means the CCS part could effectively subsidize the uncontrolled units if the math works, which it might--particularly if the capture is coupled to $90/bbl EOR.
Sources:
Emissions,
Budget:
Read 5 tweets
Emily Grubert Profile picture
Aug 10, 2021
🔥🏭 NEW from your methane attribution dream team, Diana Burns & me🏭🔥
How much do CH4 emissions contribute to GHG footprint of US natural gas-fired power, CCS, and DAC?

*Unit, utility, BA, & NERC region-level #s for power
*AR6 GWPs. Doc drop-->pub'd in 40 hours ain't bad!
HEADLINES: methane matters, a lot, and emissions are spatially variable. We used our state-level consumer-attributed emissions estimates (iopscience.iop.org/article/10.108…) + the usual EIA & EPA data suspects to see what's up. What's up is CO2e: +13-48% of CO2 ems for utility gas fleets.
The top 10 utilities with highest methane burden are largely out West, and the lowest methane burdens are heavily associated with the low-leakage Marcellus. (Btw: if people claim a low CH4 emitting supply, ask: are you blessed with Marcellus gas, or did you do something?)
Read 10 tweets

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