TECHNOLOGY FOCUS - METALLURGY - Preferred Components: The alkali metal salt is hydrochloride of alkali metal, sulfate of alkali metal, nitrate of alkali metal or carbonate of alkali metal; the alkali-earth metal is hydrochloride of alkali-earth metal, sulfate of alkali-earth metal, nitrate of alkali-earth metal or carbonate of alkali-earth metal; the transition metal salt is hydrochloride of transition metal, sulfate of transition metal, nitrate of transition metal or carbonate of transition metal; and metal oxide is iron oxide, calcium oxide, copper oxide or magnesium oxide. The hydrochloride of alkali metal is sodium chloride and/or potassium chloride; the sulfate of alkali metal is sodium sulfate and/or potassium sulfate; the nitrate of the alkali metal is sodium nitrate and/or potassium nitrate; and carbonate of the alkali metal is sodium carbonate and/or potassium carbonate. The hydrochloride of alkali-earth metal is magnesium chloride, calcium chloride or barium chloride; the sulfate of alkali-earth metal is magnesium sulfate, calcium sulfate or barium sulfate; nitrate of the alkali-earth metal is magnesium nitrate, calcium nitrate and barium nitrate; and the carbonate of alkali-earth metal is magnesium carbonate, calcium carbonate or barium carbonate. The hydrochloride of transition metal is silver chloride, copper chloride, nickel chloride, manganese chloride, iron chloride, vanadium chloride or cobalt chloride; the sulfate of the transition metal is silver sulfate, copper sulfate, nickel sulfate, manganese sulfate, iron sulfate, vanadium sulfate or cobalt sulfate; and nitrate of the transition metal is silver nitrate, copper nitrate, nickel nitrate, manganese nitrate, iron nitrate, vanadium nitrate or cobalt nitrate.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The alkane hydrocarbon fuel comprises gasoline, diesel and kerosene; heat value is less than or equal to 40 (preferably 40-46) MJ/kg; the mol ratio of hydrogen to carbon is more than 1.6; and oxygen content is less than 6%. The amount of the catalyst is 0.05-105 of the aquatic plant material. Preferred Processes: The reaction temperature is 300-600 degrees C for 5-60 minutes. The aquatic plant material is 20-mesh aquatic plant obtained by collecting, drying, crushing and screening.