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Efficient method to capture carbon dioxide from the atmosphere

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Re: Efficient method to capture carbon dioxide from the atmosphere

#341

Post by xyzzyz »

Xss3 wrote: post #336
jmward01 wrote: post #278

Earlier quoted context omitted.

Actually, solar and other renewables are making it easy to skip legacy hydrocarbon based infrastructure and the 'developing world' (not the west) is snapping it up [1]. Additionally, the big problem countries aren't really the developing world. China is rapidly hitting its targets and other than a brief moment where they threw up a lot of coal fired generation to meet immediate demand it looks like they will very rap…

I wonder if we will see more DC grids. You can get a decent 5 - 20% efficiency improvement out of it as most end user devices are DC now.

Might be most devices by count, but certainly not by power consumption. EVs are the only major appliance that’s DC, and most people don’t even have them.

Re: Efficient method to capture carbon dioxide from the atmosphere

#342

Post by bilsbie »

gspr wrote: post #259
bilsbie wrote: post #175

Earlier quoted context omitted.

Just to counter your extreme prediction, if co2 levels halve from here all life on earth goes extinct. https://www.researchgate.net/post/Minimum_necessary_concentr...

Please stop trying to hurt every single human being with these derailments. There is no plausible mechanism by which carbondioxide levels would halve. That means you're just trying to derail the discussion by appealing to people's instincts about how fragile atmospheric composition is. Stop.

I can see how you’d think that. We’re all a product of the media we consume.

It’s an interesting exercise to try to figure out what the ideal co2 level should be. Why are we fixated on preindustrial levels. I’m very open to thinking 600ppm might be more ideal than the current level.

I feel that idea has some support from things like the optimal for many crops/greenhouse plants being 800–1,200 ppm. And that Earth's vegetation has greened since the 1980s due to increased CO2.

Re: Efficient method to capture carbon dioxide from the atmosphere

#343

Post by AuthAuth »

plqbfbv wrote: post #292
newyankee wrote: post #279

Earlier quoted context omitted.

In today's world there is a roadmap for a However Chinese domination, global geopolitics being changed and fossil fuel industries and countries still being extremely large and powerful make even choosing the obviously cheapest (and incidentally clean) option difficult in many parts of the world. Nonetheless, it seems much more optimistic today in 2025 than say 2015 speaking purely based on where technology stands

> However Chinese domination .. make even choosing the obviously cheapest (and incidentally clean) option difficult in many parts of the world. In what way? China has basically dwarfed solar installations of any other country combined for the last two years, and produces so many panels and so cheap that EU and US competitors are being driven out of business. China might be the reason we CAN make the transition actual…

China is producing so much CO2 it destroys any impact this green tech may have.

Re: Efficient method to capture carbon dioxide from the atmosphere

#344

Post by plqbfbv »

AuthAuth wrote: post #343
plqbfbv wrote: post #292

Earlier quoted context omitted.

> However Chinese domination .. make even choosing the obviously cheapest (and incidentally clean) option difficult in many parts of the world. In what way? China has basically dwarfed solar installations of any other country combined for the last two years, and produces so many panels and so cheap that EU and US competitors are being driven out of business. China might be the reason we CAN make the transition actual…

China is producing so much CO2 it destroys any impact this green tech may have.

Yes, but they set more ambitious goals than the EU and they're succeeding at moving energy generation to renewables and electrifying transportation: https://www.carbonbrief.org/analysis-chinas-co2-emissions-ha...

The chemical sector is the only reason why emissions haven't meaningfully declined yet, and I suspect it is in part due to conversion of supply chain for electrification.

The point is that they're paying a one-off cost (thus producing a peak) and they're already reaping rewards. Once they fully transition power generation to renewables and electrify transportation, what's left can be better regulated and CO2 recapture more easily scaled thanks to also R&D advances on CO2 recapture (e.g. capturing CO2 emissions from a chemical plant's exhaust). Then, even if you need more energy for CO2 recapture, you can keep scaling renewables further.

Re: Efficient method to capture carbon dioxide from the atmosphere

#345

Post by AuthAuth »

plqbfbv wrote: post #344
AuthAuth wrote: post #343

Earlier quoted context omitted.

China is producing so much CO2 it destroys any impact this green tech may have.

Yes, but they set more ambitious goals than the EU and they're succeeding at moving energy generation to renewables and electrifying transportation: https://www.carbonbrief.org/analysis-chinas-co2-emissions-ha... The chemical sector is the only reason why emissions haven't meaningfully declined yet, and I suspect it is in part due to conversion of supply chain for electrification. The point is that they're paying a o…

If everyone sets goals and starts work to reduce emissions in 2015 you dont get credit for failing to meet all your goals while secretly doing the opposite and trying to create as much growth as possible by scaling coal production. Like how would it be if my country was like ok we will reduce emissions in 2045 and then doubled our emissions in the next 5 years. Thats what China is doing.

Re: Efficient method to capture carbon dioxide from the atmosphere

#347

Post by ekianjo »

_yb2s wrote: post #333
ekianjo wrote: post #309

Earlier quoted context omitted.

This has the hallmark of confounding factors. There is no way you can design a study to control for CO2 alone vs other trace contaminants in the air.

In that case it wouldn't matter much to an individual making personal decisions about their environment. Either way, an environment with enough outdoor air exchange to keep CO2 low would avoid these effects. But hypothetically, what other trace contaminants would you expect to be so universally correlated with CO2 in different environments that they could account for repeatedly observing these effects in different st…

There's tons of things in the air. Dust (and many different types of dust at different levels, both in contents and size), other gases at the trace level - lack of ventilation not only increases CO2 levels but everything else, too. And then there's the people factor. Who says that people who have proper ventilation and CO2 control are the same as the ones who don't?

If they really want to do a robust study they need to do an intervention study with clear levels of CO2 accurately controlled and the rest of the air being identical for everything else, otherwise it's purely meaningless. (it's doable, by the way).

Re: Efficient method to capture carbon dioxide from the atmosphere

#348

Post by bluerooibos »

lawrenceduk wrote: post #151
bluerooibos wrote: post #119

Earlier quoted context omitted.

I used an Awair Element after wondering if Co2 buildup was causing my groggieness in the morning and an ever so slight dull headache. My bedroom was quite small at the time, but I measured the same effect of buildup in a larger bedroom, just the Co2 level took a little longer to reach it's peak. In the small room it took about 45 mins to climb to about 1400 after I closed the door and went to sleep. I'm currently try…

We monitor air data quite closely at work. CO2 rises really fast with people in even a large space. I wouldn’t put too much effort into vents above a door as we’ve seen that CO2 will leak through doors and even floors/ceilings very quickly.

> I wouldn’t put too much effort into vents above a door as we’ve seen that CO2 will leak through doors and even floors/ceilings very quickly.

I'd like it to vent out into the hallway and the rest of the apartment though, so not sure what you mean by it leaking through doors? It's obviously not leaking enough, hence the addition of a vent. It's either that or keeping my door open all night which isn't feasible due to noise by other family members waking up etc.

Re: Efficient method to capture carbon dioxide from the atmosphere

#349

Post by alsetmusic »

deadbabe wrote: post #108
_yb2s wrote: post #67

Earlier quoted context omitted.

I think it’s little appreciated that high CO2 levels cause cognitive impairment, and with the same amount of (often very poor) air exchange, higher outdoor concentrations can push indoor spaces to levels that cause impaired cognition and poor sleep. I’ve already been seeing this in my home, and will often open windows even when cold just to keep co2 levels reasonable. One solution that can help is an external air hea…

Ok this sounds like BS, what kind of sensor is being used to get such readings? What do you use?

I've been using Netatmo stations in each room plus one outside for a decade. They monitor temp, CO2, and humidity. My CO2 levels were nightmarish during wildfires in my part of California across multiple years. Of course, the air tasted horrible and it was absolutely evident how bad it was just breathing two different years so it was not at all surprising to see that correlated on instruments that I check multiple times every day.

Edit: missed a letter

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