[ExI] [hackers-l] Re: LinkedIn weirdness

[Keith Henson]

On Sat, Mar 21, 2026 at 5:06 PM Steve Saunders
<Steven_E_Saunders at comcast.net> wrote:
>
> Perhaps the question would be — what happens to the non-carbon (non-CHO) part of the waste/feedstock after the gas is produced?  Has its bulk been reduced enough for it to be ignored?  Or to significantly reduce landfill volume?  Would it be hazardous material?

The operator sells all of it.  The slag layer can be used for
construction, and the metal layer goes to the metal recyclers.  There
are a couple of small (100 ton/day) gasifiers that sell everything
from the process.

Keith
>         Steve
>
>
> On Mar 21, 2026, at 7:03 PM, Guido van Rossum via Hackers Discussion <hackers-l at lists.hackersconference.org> wrote:
>
> 
> But it has to be disposed. Do you plan for it to go to the regular dump?
>
> Anyway, I’ve said enough. I t sounds like a cool plan but I don’t know the first thing an out the tech. (I do recall the transition from syngas to natural gas in the ‘60s in Holland, when I was a child.)
>
> --Guido (mobile)
>
>
> On Sat, Mar 21, 2026 at 15:31 Keith Henson <hkeithhenson at gmail.com> wrote:
>>
>> "What happens to the waste after the sun as is extracted?"
>>
>> It gets really dark.
>>
>> Keith
>>
>> On Sat, Mar 21, 2026 at 2:25 PM Guido van Rossum <guido at python.org> wrote:
>> >
>> > What happens to the waste after the sun as is extracted?
>> >
>> > --Guido (mobile)
>> >
>> >
>> > On Sat, Mar 21, 2026 at 13:59 Keith Henson <hkeithhenson at gmail.com> wrote:
>> >>
>> >> On Sat, Mar 21, 2026 at 8:13 AM Guido van Rossum <guido at python.org> wrote:
>> >> >
>> >> > Could it be that it looks like you are *burning* waste? (With toxic gases being produced,)
>> >> >
>> >> In Europe, they mostly do burn (incinerate) waste.  This makes dioxins
>> >> and other nasty stuff, which is hard to get out of the stack gas.
>> >> This process makes syngas out of the carbon in waste and steam.  The
>> >> gas it makes is toxic, being half CO, but after going through a power
>> >> turbine, the exhaust is the same as natural gas exhaust.
>> >>
>> >> Or you can run the gas through an F/T process and make liquid fuels.
>> >> It seems that LA trash could make about twice the fuel that LAX uses.
>> >> As a downside, I can see public campaigns to do your part and make
>> >> more trash. :-)
>> >>
>> >> Keith
>> >>
>> >> > --Guido (mobile)
>> >> >
>> >> >
>> >> > On Thu, Mar 19, 2026 at 15:47 Keith Henson via Hackers Discussion <hackers-l at lists.hackersconference.org> wrote:
>> >> >>
>> >> >> I posted this on LinkedIn.
>> >> >>
>> >> >> The biggest problem with renewable energy is large scale, long term storage.
>> >> >>
>> >> >> "A Victorian gas-making technology might solve this problem. About
>> >> >> 1860, they made gas by burning coke till it got white hot, then
>> >> >> shutting off the air and blowing steam through the mass of coke. This
>> >> >> made CO and hydrogen, which was distributed as town gas.
>> >> >>
>> >> >> "For carbon, we can use municipal waste, which is 40% carbon. For
>> >> >> heat, renewable electricity from wind or solar. 4 MWh will vaporize a
>> >> >> ton of carbon in steam, making about 11 MWh of syngas. The syngas can
>> >> >> be stored and then burned in a combined cycle turbine, giving over 6
>> >> >> MWh of electricity.
>> >> >>
>> >> >> "This scales to a rather large size. LA makes 100,000 tons per day, of
>> >> >> which 40% is carbon. Run 1/3rd of the day, the gasifiers could absorb
>> >> >> 20 GW, producing 240 GWh of syngas. This sounds like a lot until you
>> >> >> realize California is putting in 13 GW over the canals."
>> >> >>
>> >> >> According to LinkedIn, almost 1000 people read it, including people in
>> >> >> the utility industry.  There were no comments except my comment,
>> >> >> giving my email.  No emails.
>> >> >>
>> >> >> Is the idea so strange that people can't understand?  75 years ago,
>> >> >> the US made town gas from coke at a similar scale.  Is invoking
>> >> >> chemical reactions from the Victorian era simply rejected?
>> >> >>
>> >> >> Any thoughts on the results?  I am mystified.
>> >> >>
>> >> >> Keith
>> >> >>
>> >> >> PS March 24, I am giving a talk on this topic to the local IEEE
>> >> >> chapter.  If it is not closed, I will let you know.
>> >> >> --
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>
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