The process that lights up big-screen plasma TV displays could also help produce ultra-clean fuels, according to research presented this week at the National Meeting of the American Chemical Society (ACS).

The research describes a small, low-tech, inexpensive device called a GlidArc reactor that uses electrically-charged clouds of gas called "plasmas" to produce clean fuels from waste materials. One is a diesel fuel that releases 10 times less air pollution than its notoriously sooty, smelly conventional counterpart.

"Low-tech and low cost are the guiding principles behind the GlidArc reactors," said Albin Czernichowski, Ph.D., who presented the report. "Almost all the parts could be bought at your local hardware or home supply store. We use common 'plumber' piping and connections, for instance, and ordinary home insulation. Instead of sophisticated ceramics, we use the kind of heat-resistant concrete that might go into a home fireplace. You could build one in a few days for about $10,000."



The reactors, about the size of a refrigerator, are custom designed to clean dirty gases produced by a low-tech gasification of locally available wastes, biomass, or other resources to produce clean mix of carbon monoxide and hydrogen gas to synthesize biofuels. Corn farming regions, for instance, could use corn stover (leaves and stalks left in the field after harvest) as the raw material. In urban areas, waste cooking oil from restaurants could be the raw material.

In regions that produce biodiesel fuel, glycerol could be converted into clean fuels. Czernichowski pointed out production of biofuels results in huge amounts of glycerol byproduct — 200 pounds for every 2,000 pounds of biodiesel. The glycerol is expensive to refine to the high purity needed for commercial use. GlidArc reactors could transform glycerol into a clean synthesis gas (the carbon monoxide and hydrogen) for production of fuels..

The technology gets it name from the use of a gliding arc of electricity to that produces a plasma inside the reactor. The plasma allows chemical reactions to occur at dramatically reduced temperatures. Gases from heating (pyrolyse or gasification) biomass or glycerol, for instance, become clean and chemically active, and this allows for the transformation of those materials into clean fuels.

"The main advantage of such biobased fuels that the GlidArc Technology can create is that they constitute "drop-in replacements" for fossil Diesel oil, gasoline or kerosene, and no modifications are needed in engines, vehicles and distribution systems," Czernichowski said. "The biofuels can also be used as additives to various types of engine fuels to improve certain fuel properties. Another important advantage, of course, is their much lower toxicity for mankind and the environment compared to conventional fuels."



Citation: Albin Czernichowski, 'Plasma-assisted selective partial oxidation of tars and other pollutants in producer gases', Annual Meeting the American Chemical Society, March 2010