NOVELTY - The electrochemical fluid processing device or system comprises a reactor (202, 300, 302) having an interior reactor surface and an exterior reactor surface, an applicator comprising a power source (204) and an electrode (206, 306), an additional conductive material for direct heating of feedstock and producing electrochemical changes in the feedstock, control units for monitoring or adjusting the power and or frequency of the power source, and amendment, which is amended to the feedstock to alter electrical conductivity of the feedstock and promote electrochemical reactions in the fluid.    USE - The electrochemical device or system is useful for processing fluids including waters, biomass, fossil fuel, seawater, contaminated fluid, slurry, emulsion, paste, liquid, gas and/or plasma and contained within a closed containment vessel for batch processing or in a pipe for continuous flow-through processing, where a portion of the fluid contains a member of algae, woody crops, herbaceous crops, seeds of oil crops, brown coal, lignite, sub-bituminous, bituminous and anthracite coal slurries, waste coal and pond coal fines (all claimed).    ADVANTAGE - The electrochemical fluid processing device is capable of withstanding supercritical temperatures and pressures, rapidly controls the fluid temperature thus optimizing chemical reactions and avoiding overheating, and provides optimized dynamics of chemical reactions and good yield of desirable products by adjusting the frequency of the power source.    DETAILED DESCRIPTION - The electrochemical fluid processing device or system comprises a reactor (202, 300, 302) having an interior reactor surface and an exterior reactor surface, an applicator comprising a power source (204) and an electrode (206, 306), an additional conductive material for direct heating of feedstock and producing electrochemical changes in the feedstock, control units for monitoring or adjusting the power and or frequency of the power source, and amendment, which is amended to the feedstock to alter electrical conductivity of the feedstock and promote electrochemical reactions in the fluid. The direct heating causes a property change of the feedstock and the product. The power source operates at a frequency domain consisting of direct current, alternating current, radio frequency and microwave domains. INDEPENDENT CLAIMS are included for:    (1) an electrochemical process for promoting reactions in a fluid; and    (2) a process for heating a fluid to any desired temperature and pressure.    DESCRIPTION OF DRAWING(S) - The diagram 8A shows a sectional view of a radio frequency reactor and diagram 9 shows a fluid heater system.    Reactor (202, 300, 302)    Power source (204)    Electrode (206, 306)    Chamber (304)    Fittings. (310)