Posts Tagged ‘hydrogen’
The artificial leaf could be one of the most important inventions of this decade. No, this wasn’t the first time someone has invented such a thing, but it was the first time someone perfected the technology and is on the cusp of making it widely available. Meet Daniel Nocera, Ph.D. read more »
A hydrogen economy would be great. We could potentially have a limitless supply of energy because it is one of the most abundant elements on the planet while the only by product of its combustion would be water.
Currently a huge detractor is that hydrogen is expensive to produce. Water is very stable, and it takes a lot of energy to break apart water molecules into hydrogen and oxygen. Gerardine Botte of Ohio University has created a new catalyst that can extract the hydrogen from urine. read more »
MIT Professor Daniel Nocera thinks that the incremental gains made in solar output are not the answer to cheap solar energy. He thinks the answer is water. Last year Nocera and other MIT colleagues wrote a technical paper describing a closed-loop energy system. read more »
Dr. Sen Kim who is the Director of S&P Energy Research Institute (SPERI) has been working on ways to make hydrogen the fuel of the future, and he has discovered a way to produce hydrogen at an extremely low cost. The problem with hydrogen power today is that it takes 4-4.5 kwh energy for getting 1 cubic meter of hydrogen. The method they have come up with only requires .1 kwh making it significantly cheaper to produce.
Sewage seems to be in the news quite a bit in the last few weeks. This time scientists have figured out a way to produce cheap hydrogen using the stuff we flush down the toilet. Oregon State University researchers have figured out a way to produce hydrogen at a lower cost than conventional electrolysis.
The technology works by putting microorganisms from sewage to an anode’s surface and then degrading the waste in the swage using a battery. The waste decomposes and leaves protons that move to the cathode and combine with electrons producing hydrogen. It is predicted that this technology will drive the cost of hydrogen down to read more »
Prototype hydrogen powered cars have been around for a while, but earlier this week, scientists at Loughborough University showed off the world’s first hydrogen powered motorcycle. The ENV (emissions neutral vehicle) has an onboard hydrogen fuel cell that can be filled in 3 minutes. It then converts the hydrogen into usable electricity powering the motorcycle to speeds over 50 mph and has a range of about 100 miles, and of course only gives off warm air and water as exhaust.
The motorcycles are said to be easy to operate. The university has already planned to build a fleet of the ENVs for use around the campus.
HTE is a system of producing hydrogen using a technology that was originally developed for solid oxide fuel cells and is a vast improvement of efficiency over using a conventional electric current through water. Combining this with a clean power source, HTE could produce hydrogen at 45-55% efficiency. Perhaps hydrogen powered cars are not far off in the distant future.
Nanotechnology is at work once again. The US Department of Energy’s target of 45 grams per liter for hydrogen storage has almost been met using graphene sheets that are one atom thick connected by columns of carbon nanotubes. Hydrogen is stored in the gaps between the nanotubes and the graphene sheets. The researchers also added lithium ions to the structure for increased storage capacity.
While they haven’t built the ‘pillared graphene’ structure yet, the scientists’ calculations indicate that it could store up to 41 g of hydrogen per litre, just short of the DOE target of 45 g per litre.
“Our material is capable of hosting a large number of hydrogen molecules without the aid of external pressure,” says Froudakis. “Thus the material [should be] safer for usage on automobile applications and will provide faster loading times than any other existing material.” read more »