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Comment Re: What's the big problem? (Score 1) 675

I know my parents' bank in the UK doesn't allow you (technically, I believe you still can, but it's discouraged) to use the numbers on the card to make online purchases. They provide an application that runs on your desktop, connected to the internet, that generates a unique credit card/CCV/expiry number for each session (I believe it technically has access to a not insignificant pool of numbers at the bank, so there is the possibility of re-use but only after a very large number of session requests has taken place), so even if the details are stolen (which is unlikely) or the merchant is malicious, the transactions can be isolated and reversed very easily.

Comment Re:Energy in? (Score 2) 158

So they have to procure an amine in the pure form,


mix it with purified water,

Right again

heat it to 125 to 165 oC (a lot of energy, also under pressure),

Partially Correct - there was no mention of it being under pressure.

bubble the air through it (requiring at least the same pressure as the solution so there wouldn't be backflow)

1.001 Atmosphere of pressure, yes.

then recover the product using distillation (energy intensive).

Correct. Though as the solution was originally at 125-165C, the methanol would most likely be in vapour form, so condensation would be a relatively simple matter.

It's good chemistry and interesting catalysis, but I don't see how it will be cost-effective.

My guess is it would be cheaper to let a tree reduce the CO2, chop it down, and make the wood alcohol from that.

Oh, of course. Though that is a process that requires considerably more time than this one, it seems.

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