CO2 Comparison Conversion Water 
Green Car Congress
AUGUST 22, 2022
Because so much energy is lost turning steam back into water in the Rankine cycle, at most a third of the power in the steam can be converted into electricity. In comparison, the Brayton cycle has a theoretical conversion efficiency upwards of 50%. The recuperator improves the overall efficiency of the system.
Green Car Congress
DECEMBER 20, 2011
Researchers from SRI International (SRI) are developing a methane-and-coal-to-liquids process that consumes negligible amounts of water and does not generate carbon dioxide. Lifecycle GHG comparison. Water consumption less than 235 kg/barrel. Top: Conventional F-T process. Bottom: SRI process. Click to enlarge. Click to enlarge.
Green Car Congress
APRIL 11, 2014
volts versus the reversible hydrogen electrode) in CO-saturated alkaline water. For the Nature study, Kanan and Li built an electrochemical cell: two electrodes placed in water saturated with carbon monoxide gas. The challenge was to find a cathode that would reduce carbon monoxide to ethanol instead of reducing water to hydrogen.
Green Car Congress
AUGUST 13, 2014
In comparison to smooth copper electrodes, the faradaic efficiencies of CO, methane, and ethylene are reduced significantly, whereas C 2 and C 3 products such as ethane and propylene are produced in small but detectable quantities—overall, a very different product outcome than obtained from planar electrodes. Sujat Sen, Dan Liu, and G.
Green Car Congress
FEBRUARY 3, 2016
Though mixed with water, the resulting methanol can be easily distilled, Prakash said. For a comparison, there’s more than 23 times as much the noble gas Argon in the atmosphere—which still makes up less than 1% of the total volume.). CO 2 capture from air and conversion to CH 3 OH. Credit: ACS, Kothandaraman et al.
Green Car Congress
JULY 8, 2015
Geely’s CRI investment and work with renewable methanol is similar to the approach Audi is taking with its own e-fuels projects—producing very low carbon liquid or gaseous fuels using only renewable energy, water and CO 2. Their results showed that in comparison with gasoline mode, CO emitted in methanol mode decreased 11.2%.
Green Car Congress
JUNE 14, 2011
Most importantly, after full conversion of the formate, the bicarbonate solution may be recharged with hydrogen to close the cycle. to sodium formate in 96% yield at 70 °C in water/THF without additional CO 2. Dehydrogenation of sodium formate was achieved with high conversion (> 90 %) under ambient temperature (30 °C).
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