NOVELTY - Method (M1) for utilizing reagents from an electrochemical reaction, involves: (a) generating a proton removing agent (302) and an acidic solution (301) in an electrochemical reaction, where the electrochemical reaction comprises oxidizing hydrogen gas (308) at an anode; (b) optionally sequestering a first portion of carbon dioxide from a waste gas in an aqueous solution by contacting the waste gas with the proton removing agent; and (c) contacting a plant based material and the acidic solution in a reaction mixture to catalyze at least one step of a chemical synthesis.    USE - For utilizing reagents from electrochemical reaction for chemical synthesis reaction (preferably synthesis of biofuel; synthesis or furfural; esterificaton of free fatty acids; transesterification of triglycerides, or plant oil with free fatty acids (greater than 6%) (preferably used cooking oil); or digesting lignocellulosic without enzyme); and for sequestering carbon dioxide from waste gas (claimed). The biofuel is bioethanol and biodiesel. The transesterification of triglycerides, and plant oil is useful for the formation of biodiesel. The furfural is used as solvent in petrochemical refining to extract dienes which are used to make synthetic rubber from other hydrocarbons; furfural and furfuryl alcohol are useful either by themselves or together with phenol, acetone, or urea to make solid resins, which are useful in making fiberglass, aircraft components, and automotive brakes; and furfural is also an intermediate in production of solvents furan, 2-methyltetrahydrofuran, and tetrahydrofuran.    ADVANTAGE - The electrochemical method and system for utilizing reagents from an electrochemical reaction provide acid by low voltage electrochemical method for use in production of biofuels and other organic chemicals from carbon sequestering plant materials. The electrochemical method also generates proton removing agents for process that sequesters carbon dioxide from waste gas. Thus the method and system beneficially and efficiently provide low cost reagents for processes that result in reduced release of carbon dioxide into atmosphere.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a system comprising: an electrochemical system (300) for generating a proton removing agent and acidic solution in an electrochemical reaction; a first reaction vessel operably connected to the electrochemical system for sequestering a first portion of carbon dioxide from a waste gas configured to contact an aqueous solution comprising the proton removing agent with the waste gas comprising carbon dioxide; and a second reaction vessel operably connected to the electrochemical system for contacting a plant based material and the acidic solution to catalyze a chemical reaction.    DESCRIPTION OF DRAWING(S) - The figure shows the electrochemical component of system for generating proton removing agent and acidic solution in electrochemical reaction.    Electrochemical system (300)    Acid (301)    Proton removing agent (302)    Anolyte (303)    Anode (304)    Cathode (305)    Catholyte (306)    Hydrogen gas that migrates into catholyte (307)    Hydrogen gas at anode (308)    Ion exchange membrane (310)