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BicycleT
Stranger

Registered: 10/20/18
Posts: 288
Last seen: 2 years, 4 months
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Carbon Neutral Lime Production
#25765590 - 01/24/19 02:35 PM (5 years, 3 months ago) |
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I am planning a scale experiment for carbon neutral lime production.
- My materials will be a Fresnel lens from a 50" floor standing TV
- A titanium pipe with threaded caps
- Two magnet rotors with neodymium rare earth magnets
I read about a lime/energy production project in Australia. It uses a huge heliostat of mirrors and a tower to heat up CaCO₃ to 800°f which is above the temperature for decarbonization, but at that temperature through electrolysis the CO₂ can be split to carbon at the cathode and oxygen at the anode(temperatures below 800°f can produce useful CO, carbonmonoxide gas, which also reduces the amount of black carbon blocking up the cathode, increasing run times.)
For my scale project, I will put limestone into a titanium pipe. I am choosing titanium because it doesn't creep like steel, and I don't want my pipes to become magnetic. I would also like to choose very thin gauged pipe to reduce the amount of mass that needs to be heated. The Fresnel lens will concentrate solar power onto the titanium pipe and heat it to 800°f. The magnet rotors will spin and create a magnetic field that will split the CO₂ into black carbon and O₂. I will know I am successful if I open the container and it contains CaO(lime) and C(black carbon.) This lime would probably be good for agricultural purposes. In Wisconsin, limestone is abundant.
Neodymium magnets have a much higher curie temperature than ferric magnets, but 800°f would demagnetize them, but by increasing the diameter of the magnet rotors, I should be able to improve cooling.
I think the diameter of the titanium pipe would probably be pretty small on a 50" lens. Maybe only one inch. A 50" inch lens is up to 1200w, but probably only 80% of that(if plastic is 20% partially reflective and solar power is 176w/m₂.)
I want to start by making several of these machines so I can start tuning them. It would probably be a cool little gimmick to sell agricultural lime in a titanium pipe/bar. The pipe/bar could come in handy.
They will probably each need an arduino for solar tracking, feeding the pipe through the focal point of the sun, and for controlling the magnet rotors.
It would be sweet to make an outdoors factory. A pipe filling machine. Pipe loading machines. Augers. Like a Coke factory.

I am incorporating an LLC in Waukesha,WI for the production of carbon neutral lime. I am a heavy equipment operator, and I'm really good at it. I once whipped a 180° reverse shitty in a pea harvester. It was pretty dry out and I was reversing down a hill, but that machine weighed 20 ton and I did a perfect 180°, "Mississippi Queen" by Leslie West was on the FM radio, and Stubby was on the CB yelling, "TYLER, WHAT THE HELL ARE YOU DOIN?!?" #8 used a little more grease after that, but I know how to fix it, but I need to make a hydraulic press.
Edited by BicycleT (01/24/19 10:05 PM)
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BicycleT
Stranger

Registered: 10/20/18
Posts: 288
Last seen: 2 years, 4 months
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Enhancing CO2 electrolysis [Re: BicycleT]
#25765959 - 01/24/19 06:28 PM (5 years, 3 months ago) |
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"Enhancing CO2 electrolysis through synergistic control of non-stoichiometry and doping to tune cathode surface structures"
Lingting Ye, Minyi Zhang, Ping Huang, Guocong Guo, Maochun Hong, Chunsen Li, John T. S. Irvine & Kui Xie
Currently, nickel/yttria-stabilized zirconia (Ni-YSZ) composites are the cathode of choice for high-temperature SOEs5,6. In such a composite, the percolating networks of both Ni and YSZ provide sufficient electronic and ionic conductivity, while the Ni guarantees high electrocatalytic activity towards the reduction reaction. Long-term operation with Ni-YSZ is feasible only in CO/CO2 gas mixtures, where the presence of CO maintains a reducing atmosphere7. Under realistic conditions however, reduction–oxidation (redox) cycles of Ni will inevitably occur in the cathode, ultimately leading to electrode degradation and delamination8,9. In contrast, redox-stable ceramic cathodes would offer a promising alternative for direct high-performance CO2 electrolysis. Especially materials exhibiting n-type conduction properties are expected to demonstrate improved conductivity under the strongly reducing cathode conditions. Perovskite-type doped strontium titanates, (La,Sr)TiO3+δ (LSTO+), are such materials, due to the reducibility of Ti4+ to Ti3+, and have therefore attracted a significant amount of interest within the field of SOE and fuel cell electrodes10,11. A composite cathode based on La0.2Sr0.8TiO3.1 was shown to be well adapted to direct CO2 electrolysis12, because the titanate is partially electrochemically reduced (Ti4+→Ti3+) at potentials required for CO2 reduction and the n-type electronic conduction is accordingly enhanced, but cathode performance for CO2 electrolysis is still limited by insufficient electro-catalytic activity and the weak high-temperature chemical adsorption of reactants13.
https://www.nature.com/articles/ncomms14785
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BicycleT
Stranger

Registered: 10/20/18
Posts: 288
Last seen: 2 years, 4 months
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Jeremy Feaster - Insights into the Electrochemical Reduction of CO2 on Tin Electrons [Re: BicycleT]
#25765979 - 01/24/19 06:40 PM (5 years, 3 months ago) |
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