Fuel cells are one of the crucial links in the hoped for hydrogen economy, Hydrogen is an energy storage medium, a fuel, like gasoline it’s chemical energy must be converted to work by some means. In the case of a combustion engine, as we all know, fuel is combined with atmospheric oxygen and burned at high temperature, producing heat and exhaust gasses, the exhaust gasses we’re suffocating the world with. By contrast, a fuel cell oxidizes fuel, the cleanest being pure hydrogen and converts it directly to electricity and water at relatively low temperatures. In it’s simplest terms, to quote Wikipedia

Fuel cell

From Wikipedia, the free encyclopedia

A fuel cell is an electrochemical conversion device. It produces electricity from fuel (on the anode side) and an oxidant (on the cathode side), which react in the presence of an electrolyte. The reactants flow into the cell, and the reaction products flow out of it, while the electrolyte remains within it. Fuel cells can operate virtually continuously as long as the necessary flows are maintained.

Fuel cells are different from electrochemical cell batteries in that they consume reactant from an external source, which must be replenished^[1] – a thermodynamically open system. By contrast, batteries store electrical energy chemically and hence represent a thermodynamically closed system.

Many combinations of fuels and oxidants are possible. A hydrogen fuel cell uses hydrogen as its fuel and oxygen (usually from air) as its oxidant. Other fuels include hydrocarbons and alcohols. Other oxidants include chlorine and chlorine dioxide.^[2]

Another distinct advantage of fuel cells over conventional internal combustion engines is mechanical simplicity; virtually no moving parts. Add the near carbon neutral operation to this and the advantages over current motor tech is compelling, to say the least. Funny how the choices societies and individuals make may have profound unanticipated consequences. The first fuel cell was demonstrated a842. Again, from Wikipedia;

The principle of the fuel cell was discovered by German scientist Christian Friedrich Schönbein in 1838 and published in one of the scientific magazines of the time.^[16] Based on this work, the first fuel cell was demonstrated by Welsh scientist and barrister Sir William Robert Grove in the February 1839 edition of the Philosophical Magazine and Journal of Science^[17] and later sketched, in 1842, in the same journal.^[18] The fuel cell he made used similar materials to today’s phosphoric-acid fuel cell.

The ready sources of petroleum extracted for transportation fuel first in the US probably doomed both the fuel cell and electric transportation, too bad for us and our grandchildren, but now as always necessity is the proverbial mother of invention (no, Frank Zappa stole the term). And so below We present a short summary of current developments from fuel cell world. More »

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Microscopic diatoms like the one shown above could yield massive amounts of oil, scientists say. Credit: The American Chemical Society

Scientists in Canada and India are proposing a surprising new solution to the global energy crisis —“milking” oil from the tiny, single-cell algae known as diatoms, renowned for their intricate, beautifully sculpted shells that resemble fine lacework. Their report appears online in the current issue of the ACS’ bi-monthly journal Industrial Engineering & Chemical Research.

Richard Gordon, T. V. Ramachandra, Durga Madhab Mahapatra, and Karthick Band note that some geologists believe that much of the world’s crude oil originated in diatoms, which produce an oily substance in their bodies. Barely one-third of a strand of hair in diameter, diatoms flourish in enormous numbers in oceans and other water sources. They die, drift to the seafloor, and deposit their shells and oil into the sediments. Estimates suggest that live diatoms could make 10−200 times as much oil per acre of cultivated area compared to oil seeds, Gordon says.

“We propose ways of harvesting oil from diatoms, using biochemical engineering and also a new solar panel approach that utilizes genetically modifiable aspects of diatom biology, offering the prospect of “milking” diatoms for sustainable energy by altering them to actively secrete oil products,” the scientists say. “Secretion by and milking of diatoms may provide a way around the puzzle of how to make algae that both grow quickly and have a very high oil content.”

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ScienceDaily (May 19, 2009) — The answer to the looming fuel crisis in the 21st century may be found by thinking small, microscopic in fact. Microscopic organisms from bacteria and cyanobacteria, to fungi and microalgae, are biological factories that are proving to be efficient sources of inexpensive, environmentally friendly biofuels that can serve as alternatives to oil, according to research presented at the 109th General Meeting of the American Society for Microbiology

“We have been charged to develop the next generation of cellulosic biofuels. When we successfully supply sources of energy to the grid from non-food, cellulosic, parts of plants we will mitigate the food versus fuel debate,” says Tim Donohue of the University of Wisconsin, Madison, one of two directors of Department of Energy Bioenergy Research Centers who spoke today in a session at the meeting.
When it comes to alternative fuels, currently ethanol is king. Almost all ethanol produced in the United States is fermented from readily available sugars in corn starch or corn kernels. Producing ethanol from corn has also come under much criticism lately, accused of being responsible for rising food prices.

Researchers are looking at alternate biomasses as food for microorganisms to ferment into ethanol. The most attractive are known as lignocellulosic biomass and include wood residues (including sawmill and paper mill discards), municipal paper waste, agricultural residues (including sugarcane bagasse), dedicated energy crops (like switchgrass) or the non-edible parts of corn like cobs, stalks or stover. The problem is, unlike corn starch, the sugars necessary for fermentation are trapped inside the lignocellulose part of this plant biomass. The key to ending the food versus fuel debate is unlocking the sugars trapped in cellulosic biomass.

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, Bioufuel research and development, South San Francisco

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