For this reason methanol fuel cells will be used, where the combination of methanol and
oxygen produces water and carbon dioxide as a waste product (note that the carbon footprint in this case is neutral in that the methanol will be produced by photosynthesis, removing CO2 from the atmosphere).
Not exact matches
This uses electrolysis to «split»
water,
producing hydrogen and
oxygen.
«Electricity splits
water into hydrogen and
oxygen, and the same cell can later use the hydrogen to
produce electricity and heat.»
COHRAL (TM) technology — which is applicable to both livestock and cropping operations — uses concentrated anaerobic bacteria to digest 70 per cent of the organic matter (COD, or Chemical
Oxygen demand) in Oakey Abattoir's waste
water to
produce effluent of far high quality than typical open lagoons.
The boats
produce their own
oxygen and fresh
water and this enables them to remain at sea almost indefinitely.
This expanse of low -
oxygen, or hypoxic,
waters is
produced by an overgrowth of algae caused by high nutrient concentrations.
Hydrogen gas is a promising alternative energy source to overcome our reliance on carbon - based fuels, and has the benefit of
producing only
water when it is reacted with
oxygen.
Stanford University scientists have invented a low - cost
water splitter that uses a single catalyst to
produce both hydrogen and
oxygen gas 24 hours a day, seven days a week.
In superheating,
water is heated well beyond its boiling point — in this case from 1,000 to 1,300 degrees Celsius —
producing high - temperature steam to run turbines and also to operate solar reactors to split the
water into hydrogen and
oxygen.
Clean renewable energy can be
produced by photocatalytically splitting
water into hydrogen and
oxygen with solar energy.
Ocean
water permeating the porous rock of the core could be exposed to ionizing radiation and undergo radiolysis,
producing molecular hydrogen and reactive
oxygen compounds.
Once the nanoparticles are added and light applied, the
water separates into hydrogen and
oxygen almost immediately,
producing twice as much hydrogen as
oxygen, as expected from the 2:1 hydrogen to
oxygen ratio in H2O
water molecules, Bao said.
A solar cell splits
water with two electrodes,
producing oxygen on one electrode, while generating hydrogen on the other.
Natural landscapes filter
water,
produce oxygen, sequester carbon, and provide vital habitat for other species.
Asteroids also contain an abundance of
water, which, aside from serving as hydration during space travel, could be used as a shield to protect spaceships from the sun's radiation or to
produce hydrogen - and
oxygen - based rocket fuels.
By modeling the reaction, they concluded that the initial energy burst could come from ultraviolet (UV) light, which
produces energetic
oxygen called singlet
oxygen when it breaks up
water molecules.
So the original 6 pounds of carbon combine with 15 or 16 pounds of
oxygen, minus some soot,
water, and other by - products, and, bingo, by driving 21 miles down the road, my car has just disturbed the balance of the planet's carbon cycle by
producing 19 pounds of CO2.
Although the catalyst does
produce oxygen from
water, it does not
produce hydrogen gas (H2) that can be burnt in a fuel cell.
Currently, electrolyzers (machines that split
water into its constituent hydrogen and
oxygen) need a catalyst, namely platinum, to run; ditto fuel cells to recombine that hydrogen with
oxygen, which
produces electricity.
Using spectral readings from telescopes at the Keck Observatory in Hawaii, Hand has found high levels of oxidative chemicals such as sulfate,
oxygen, sulfur dioxide and hydrogen peroxide on Europa's surface, which are
produced as ionizing radiation from Jupiter scours it, splitting apart
water molecules and sulfur compounds in the uppermost layers of its ice.
Rechargeable batteries are too heavy for the job, so engineers are planning to try a technology that would use current to separate
water into
oxygen and hydrogen during the day, and then reverse the process at night via fuel cells to
produce electricity.
Cortright and chemical engineer James Dumesic discovered in their university lab back in 2001 that by starting with
water and various carbohydrates from plants — basically, carbon, hydrogen and
oxygen compounds — and using catalysts, heat and pressure, they could start creating CO2 and hydrogen and then use that hydrogen to eliminate the
oxygen as
water (the process
produces more
water than it consumes).
Accompanying the founders of the new Mars colony would be large amounts of equipment, including machines to
produce fertilizer, methane and
oxygen from Mars» atmospheric nitrogen and carbon dioxide and the planet's subsurface
water ice.
Trying to make a building like a tree that makes
oxygen, sequesters carbon,
produces more power than it needs to operate, and purifies its own
water — things like that.
Photosystem II is the light - driven enzyme that oxidizes
water to
produce oxygen in plants, algae and cyanobacteria.
These microbes conduct photosynthesis: using sunshine,
water and carbon dioxide to
produce carbohydrates and, yes,
oxygen.
Water (H2O) plus carbon dioxide (CO2) plus light energy (solar radiation)
produces carbohydrates plus
oxygen.
This research not only provides the first clear evidence that microorganisms were directly involved in the deposition of Earth's oldest iron formations; it also indicates that large populations of
oxygen -
producing cyanobacteria were at work in the shallow areas of the ancient oceans, while deeper
water still reached by the light (the photic zone) tended to be populated by anoxyenic or micro-aerophilic iron - oxidizing bacteria which formed the iron deposits.
While the negative electrons flow out as usable current, the positive protons are drawn to the cathode, where they recombine with returning electrons and
oxygen to
produce water.
The principle is that, if no
oxygen is present, the bacteria's metabolism changes to
produce protons and electrons instead of carbon dioxide and
water.
Once there it will
produce propellant on Mars itself, either by distilling carbon dioxide from the atmosphere and mixing it with hydrogen brought from Earth to generate methane and
oxygen or by electrolyzing
water from the permafrost to make liquid hydrogen and
oxygen.
Its combination with
oxygen in the atmosphere
produces energy and
water as its sole by - product, making it one of the main candidates to substitute fossil fuels as a source of energy for the transport sector.
The latest experiments from Strasser's research group indicate that substantial increases in efficiency may also be possible for the reaction splitting
water to
produce oxygen in electrolysers, for which the even more expensive noble metal iridium is used.
A film of high - surface - area nickel foam coated with graphene and a compound of iron, manganese and phosphorus serve as a
water - splitting catalyst that can
produce hydrogen and
oxygen simultaneously.
The reaction combines the hydroxyl molecule (OH,
produced by reaction of
oxygen and
water) and carbon monoxide (CO, a byproduct of incomplete fossil fuel combustion) to form hydrogen (H) and carbon dioxide (CO2, a «greenhouse gas» contributing to global warming), as well as heat.
«Robust catalyst to split
water into hydrogen,
oxygen produced.»
Finally, the researchers looked at the impact of adding succinate — a salt that
oxygen - loving bacteria in the gut
produce as a byproduct — into the drinking
water of germ - free mice with 4 - day microbes that had received extra Clostridia.
Huang refers to the splitting of
water, a process used to create gaseous hydrogen and
oxygen from liquid
water where properly defective molybdenum sulfide could enhance the process and reduce the amounts of energy and costs needed and increase the amount of hydrogen
produced.
Splitting
water into hydrogen and
oxygen to
produce clean energy can be simplified with a single catalyst developed by scientists at Rice University and the University of Houston.
The
oxygen would have «burned up» the carbon to
produce gases such as carbon dioxide and monoxide, which would have moved into the outer disk along with
water vapor before chilling into ices, so that any solid carbon in the inner solar system would have been destroyed within a few years.
The hydrogen trapped in the
water as a result of our first equation can be brought back to
produce more and more methane, with a large amount of
oxygen being
produced that could serve as a huge backup to the life - support system of the Mars habitat.
The worms» passageways introduce air into the soil by allowing
oxygen and
water to percolate down to growing plant roots and letting carbon dioxide
produced from the plants flow back out into the atmosphere.
Because
producing oxygen from splitting
water is a barrier to using artificial photosynthesis (the splitting of
water into H ₂ and O ₂ as a renewable energy, many research programs focus on designing catalysts that assist with this
oxygen -
producing step.
Just before this period, some anaerobes mutated to become «aerobic» purple bacteria (proteobacteria) that metabolize molecular
oxygen and substances
produced by life such as carbohydrates into carbon dioxide and
water.
Going back to Equation 1, as mentioned above, catalysts are needed to efficiently split
water because all
water - splitting schemes require the inefficient step of
producing oxygen.
Under red dwarf stars, plant - type life on land may not be possible because photosynthesis might not generate sufficient energy from infrared light to
produce the
oxygen needed to block dangerous ultraviolet light from such stars at the very close orbital distances needed for a planet to be warmed enough to have liquid
water on its surface.
MOXIE will attempt to
produce about 20 grams of
oxygen per hour for around 50 hours, probably using the reverse
water - gas shift reaction (CO2 + H2 - > CO + H20) and then electrolysis of the resulting
water to
produce oxygen.
If either tech demonstration works as planned, future missions might include large - scale ISRU devices that are capable of
producing significant amounts of hydrogen,
oxygen, and
water on the Moon or Mars.
PSII is a light harvesting system that splits
water molecules to
produce oxygen.
In an artificial photosynthetic system, the oxidation of
water molecules into
oxygen, electrons and protons (hydrogen ions) provides the electrons needed to
produce liquid fuels from carbon dioxide and
water.