Wednesday, September 29, 2010
Low-temperature catalyst for hydrogen purification
Low-temperature catalyst for hydrogen purification Engineering researchers from Tufts University, the University of Wisconsin-Madison and Harvard University have demonstrated the low-temperature efficacy of an atomically dispersed platinum catalyst, which could be suitable for on-board hydrogen production in fuel-cell-powered vehicles of the future.
Friday, September 24, 2010
Hawaii's Great Hydrogen Fuel Experiment : Discovery News
Hawaii's Great Hydrogen Fuel Experiment : Discovery News The Hawaiian island of Oahu is far ahead of the rest of the country when it comes to ushering in a new era for climate-friendly transportation and energy infrastructure. The state’s gas company recently teamed up with General Motors to set up an island-wide hydrogen fuel system by 2015, complete with hydrogen fuel cell-powered cars and numerous fueling stations.
Hydrogen fuel is one of the more attractive energy alternatives to oil: it is abundant and it produces only wate
Hydrogen fuel is one of the more attractive energy alternatives to oil: it is abundant and it produces only wate
Sunday, September 12, 2010
Hydrogen causes metal to break
Hydrogen causes metal to break: "In the transportation and energy sectors, hydrogen is viewed as an eventual alternative to the raw materials of fossil-fuel power, such as coal, petroleum and natural gas. However, for metals like steel, aluminum and magnesium -- which are commonly used in automotive and energy technology -- hydrogen is not quite ideal. It can make these metals brittle; the ductility of the metal becomes reduced. Its durability deteriorates."
Monday, August 2, 2010
Waste fat from frying fuels hydrogen economy
Waste fat from frying fuels hydrogen economy: "Researchers at the University of Leeds have now found an energy-efficient way to make hydrogen out of used vegetable oils discarded by restaurants, takeaways and pubs. Not only does the process generate some of the energy needed to make the hydrogen gas itself, it is also essentially carbon-neutral."
Tuesday, July 27, 2010
Ultrahigh Porosity in Metal-Organic Frameworks -- Furukawa et al. 329 (5990): 424 -- Science
Ultrahigh Porosity in Metal-Organic Frameworks -- Furukawa et al. 329 (5990): 424 -- Science
Crystalline solids with extended non-interpenetrating three-dimensional crystal structures were synthesized that support well-defined pores with internal diameters of up to 48 angstroms. The Zn4O(CO2)6 unit was joined with either one or two kinds of organic link, 4,4',4''-[benzene-1,3,5-triyl-tris(ethyne-2,1-diyl)]tribenzoate (BTE), 4,4',44''-[benzene-1,3,5-triyl-tris(benzene-4,1-diyl)]tribenzoate (BBC), 4,4',44''-benzene-1,3,5-triyl-tribenzoate (BTB)/2,6-naphthalenedicarboxylate (NDC), and BTE/biphenyl-4,4'-dicarboxylate (BPDC), to give four metal-organic frameworks (MOFs), MOF-180, -200, -205, and -210, respectively. Members of this series of MOFs show exceptional porosities and gas (hydrogen, methane, and carbon dioxide) uptake capacities. For example, MOF-210 has Brunauer-Emmett-Teller and Langmuir surface areas of 6240 and 10,400 square meters per gram, respectively, and a total carbon dioxide storage capacity of 2870 milligrams per gram. The volume-specific internal surface area of MOF-210 (2060 square meters per cubic centimeter) is equivalent to the outer surface of nanoparticles (3-nanometer cubes) and near the ultimate adsorption limit for solid materials.
Crystalline solids with extended non-interpenetrating three-dimensional crystal structures were synthesized that support well-defined pores with internal diameters of up to 48 angstroms. The Zn4O(CO2)6 unit was joined with either one or two kinds of organic link, 4,4',4''-[benzene-1,3,5-triyl-tris(ethyne-2,1-diyl)]tribenzoate (BTE), 4,4',44''-[benzene-1,3,5-triyl-tris(benzene-4,1-diyl)]tribenzoate (BBC), 4,4',44''-benzene-1,3,5-triyl-tribenzoate (BTB)/2,6-naphthalenedicarboxylate (NDC), and BTE/biphenyl-4,4'-dicarboxylate (BPDC), to give four metal-organic frameworks (MOFs), MOF-180, -200, -205, and -210, respectively. Members of this series of MOFs show exceptional porosities and gas (hydrogen, methane, and carbon dioxide) uptake capacities. For example, MOF-210 has Brunauer-Emmett-Teller and Langmuir surface areas of 6240 and 10,400 square meters per gram, respectively, and a total carbon dioxide storage capacity of 2870 milligrams per gram. The volume-specific internal surface area of MOF-210 (2060 square meters per cubic centimeter) is equivalent to the outer surface of nanoparticles (3-nanometer cubes) and near the ultimate adsorption limit for solid materials.
Wednesday, May 19, 2010
The Short-Term Hydrogen Economy: Fueling Fuel Cells from Natural Gas | Engineering Cases
The Short-Term Hydrogen Economy: Fueling Fuel Cells from Natural Gas | Engineering Cases: "As the supply of fossil fuels decreases, it is quite possible that future stationary or mobile energy systems will use hydrogen fuel cells. Natural gas has been proposed as a transition fuel as it is currently plentiful and has an existing infrastructure."
Wednesday, May 5, 2010
Hydrogen and Fuel Cell Industry Breaks New Ground | National Hydrogen Association
Hydrogen and Fuel Cell Industry Breaks New Ground | National Hydrogen Association: "Washington, DC—In just the last few days, auto manufacturers, hydrogen producers and fuel cell and component manufacturers have revealed breaking news or new products, creating a wave of energy to open the largest hydrogen and fuel cell event of the year. The NHA Hydrogen Conference and Expo starts Monday, May 3 in Long Beach, CA at the Long Beach Convention Center."
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