Sulfur dioxide-oxygen fuel cell

A fuel cell representing great interest is the sulfur dioxide-oxygen fuel cell, where the following reactions take place ... 

Fuel cells generate electricity, heat, and distilled water by reacting H2 with oxygen (air). This process emits no C02, no carbon monoxide, no sulfur dioxide, no volatile organic compounds, and no fine particles. The only byproduct of the oxidation of H2 is distilled water. There are some 1,035 firms that are active in the field of fuel cell development and manufacturing (http //www. fuelcells.org/directory). This field of technology is fast advancing, the delivery of new units increased by 75% to approximately 100,000 units in 2007. 

Besides the aerobic microorganisms there are also anaerobic ones. These exist and multiply where no dissolved oxygen is present. Saprophytic bacteria produce organic acids and alcohols. The methane bacteria will then convert these compounds into cells plus carbon dioxide and methane. The methane may be recovered and binned as fuel. If any sulfur is present it will eventually be converted to H2S. 

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