NEW TYPE OF ECOLOGICALLY CLEAN SMALL-SCALE POWER PLANTS BASED ON FAST COMBUSTION OF WATER-ALUMINUM SUSPENSION AND BIOGAS COMBUSTION IN MATRIX BURNERS

The paper describes the new type of highly effective ecologically clean small-scale power plants that use renewable energy resources of both organic and inorganic origin, notably biogas and aluminum. The oxidation of aluminum in water suspensions proceeds in combustion wave in high temperature reactor at pressures up to 100 atm and temperatures 2500-3000^oC. The process let separate generation of hydrogen and high temperature steam. The first stage involves the combustion of water-aluminum suspension of stoichiometric composition with the production of hydrogen and rigid frame of very hot aluminum oxide. At the second stage after hydrogen removing the additional portion of water is introduced into reactor. At the interaction with hot aluminum oxide this water converts to high temperature steam. After aluminum oxide removing the process can be repeated. Such process enables us to escape the penetration of highly dispersed corundum particles in power plant. As a combustor for low calorific biogas a volumetric matrix burner is used. The possibility of stable combustion of low calorific biogas in such combine power plant is provided both by the peculiarities of matrix combustors and addition of hydrogen generated at the combustion of water-aluminum suspension. Thus, such combination enables us to use two different types of renewable energy sources in combined device. At that, aluminum oxidation produces hydrogen that provides sustained combustion of low calorific biogas in matrix burner for ecologically clean distributed power generation from renewable sources.

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