3a, Natural Gas/Oil Allam Cycle CCS Power Plant
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Natural Gas or Oil Allam
Cycle CCS Power Plant
Midwest Regional Carbon Sequestration Partnership: https://www.mrcsp.org/
Solid fuels such as Coal, Lignite, etc., need a second solid-to-gas gasification module. See 3b Coal or Lignite Allam Cycle CCS Power Plant
Articles: https://www.powermag.com/inside-net-power-gas-power-goes-supercritical/?mypower supercritical carbon dioxide (sCO2) cycles
This website's pages: 3a Natural Gas or Oil Allam Cycle CCS Power Plant 3b Coal or Lignite Allam Cycle CCS Power Plant Similar Technologies
The basic Natural Gas or Oil burning Allam cycle module.
A leading chemical engineer, Rodney Allam, has invented a new
fossil-fuel powered thermodynamic cycle
for power plants. It has been named the "Allam Cycle". It's emissions are
sequestration grade and pressure CO2, potable water, industrial grade argon gas,
and industrial grade nitrogen gas - each coming out of their individual exhaust
pipes. A 1/10th size pilot plant has been constructed in LaPorte, Texas
(near Houston) and has been connected to the Texas electrical grid, providing 25
megaWatts of electricity since last October. As far as
I know, so far, so good.
This new technology has the potential of economically powering the reduction of fossil fuel greenhouse gas emissions to net-zero by 2050 by powering the manufacture of biomass-based net-zero replacements for fossil fuels such as gasoline, diesel, jet fuel, and natural gas. Since fossil fuel is available everywhere, these fuel factories can be located anywhere both biomass and CO2 sequestration strata exist. Mankind can then consume the world's remaining fossil fuel by using it to power the manufacture of net-zero fossil fuel substitutes.
Dubbed the "Allam Cycle", it exploits the thermal and pressure characteristics of supercritical liquid carbon dioxide and water - instead of pure steam, air, or helium - as its working fluid. Relatively simple and 59% efficient, it uses an external rocket-engine-like oxygen+methane combustor instead of a water boiler. The combustor directly drives a simple high-temperature gas turbine-generator with a blast of CO2 gas and steam. It can be powered by any methane-gasified fossil fuel, i.e., natural gas, oil, coal, lignite. The only emissions are pure high pressure liquid CO2 ready for underground disposal and pure liquid fresh water, industrial grade nitrogen gas, and industrial grade argon gas, each coming out of the Allam engine contained in it's own pipe. If renewable fuels are used and sequestered, the Allam engine would produce carbon-negative CO2 emissions.
It should be noted that the super-clean, fossil fuel versatile, Allam Cycle 30 mW(e)
grid-connected pilot plant - a new form of Oxy-fuel carbon capture - is
performing well and appears economically
competitive all the way down to non-CCS Lignite.
The first mass production Allam cycle power plant will be a 300 mW(e) single turbine version made by Toshiba, possibly as soon as 2021. "While the challenges remain significant and require a focused research effort, there donít appear to be any show stopping problems to commercialization of this technology." - P.A. Strakey, et al., 2014.
Toshiba will manufacture the 300 megaWatt full size version. In addition to the 300 megaWatts of grid electricity, it might produce as much as 1 million gallons of potable water per day and 5% CO2 by volume. The Allam's oxyfuel combustor is pretty close to a rocket engine. Think of the massive white plume of steam coming out of a oxyfuel rocket engine as it lifts off.
Perhaps Toshiba could license their design to the world's top power plant companies to ultimately make 10 to 20 thousand 300 mW copies in the next 10 to 20 years. The coal and lignite versions would need an additional gasification module. Shutting down all the world's conventional coal plants would really pull the rug out from under Climate Change.
To this author, this achievement may open the door to halting the 100 million tons of CO2 the world adds to the air every day via unconfined fossil fuel burning and perhaps also halt most of the current plans for building over 1,600 new large conventional coal power plants in 62 countries [Urgewald's tally], replacing conventional air polluting coal power plant plans with plans for environmentally safe Allam cycle gasified coal power plants instead. (Recall pre-WWII "Town Gas" made from coal?)
Once fossil fuel CO2 addition to the air is halted by substituting the use of environmentally safe carbon-neutral renewable fuels instead of fossil fuels, CO2 subtraction from the air can begin with the goal of eventually restoring the air to the way it was before the beginning of the first fossil fuel age.
I've been aware of what steam turbines looked like since 1956. This is the fattest turbine I've ever seen. Supercritical carbon dioxide must pack a heck of a wallop.
Below: Close, but no cigar!