TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The process (M1) involves fumigating the intake air with the fumigant in 0.5-70 (preferably up to 20) wt.% of main fuel. The process involves fumigating with fumigant comprising an ether as the ignition enhancer; fumigating with a fumigant comprising dimethyl ether; introducing a main fuel comprising water and methanol in a ratio of 0.2:99.8 to 80:20 (preferably 0.2:99.8 to 60:40) into the combustion chamber; includes introducing a main fuel comprising (wt.%): water (12-23, preferably 20-68, especially 20-22), methanol, and additives (not more than 20)). The process includes introducing a main fuel comprising (wt.%): water (20-22), dimethyl ether (DME) (4-6) and methanol. The main fuel comprises crude methanol and non-water additives (up to 60%) (preferably refined methanol and non-water additives (up to 25%)). The process includes preheating the intake air in the combustion chamber before feeding the main fuel into the combustion chamber; pre-heating the intake air to at least 130 degrees C; producing the ignition enhancer by catalytic conversion of methanol in a stream of the main fuel composition; providing a pre-fuel comprising methanol and ether as ignition enhancer, separating the ignition enhancer from the pre-fuel, fumigating the intake air stream with the ignition enhancer separated from the pre-fuel, and introducing the balance of the pre-fuel following separation of the ignition enhancer into the combustion chamber as the main fuel. The process includes pre-heating the intake air to 150-300 degrees C. Preferred Components: The ignition enhancer comprises dimethyl ether. The main fuel comprises at least one additive selected from ignition improver, fuel extender, combustion enhancer, oxygen absorbing oil, lubricity additive, product coloration additive, flame color additive, anti corrosion additive, biocide, freeze point depressant, deposit reductant, denaturant and/or pH controlling agent. Preferred Fuel: The fuel comprises (%): water (3-40) and dimethyl ether (not more than 20). The additives comprise (wt.%): a product coloration additive (up to 1) and a flame color additive (up to 1) of the fuel. The main fuel is introduced into the combustion chamber of the compression ignition engine, and the secondary fuel is fumigated into the air intake of the compression ignition engine. The pre-fuel composition comprises ether (7-10%); and further comprises water. Preferred System: The power generation system (M3) involves recycling the exhaust heat and/or water back into the engine; exchanging heat from the exhaust gas through a heat exchanger to water in a hot water loop, and transferring heat in the water through the hot water loop to a local community. The system is adapted to power a rail vehicle, comprising treating exhaust gas to remove particulates from the exhaust gas and recover heat and water to recycle back into the engine and/or to use on the rail vehicle. The power generating system is adapted to power a marine vehicle, comprising treating exhaust gas in a desalinator to recover heat and water to recycle back into the engine and/or to redirect for use on the marine vehicle. The system involves mixing engine exhaust gas with water in a mixer to cool the exhaust gas and recover water from exhaust gas condensate; pumping water containing exhaust gas from the mixer to a liquid/gas heat exchanger to further cool the exhaust gas/water mix and recover exhaust heat and/or water; recovering water from exhaust gas in a final stage exhaust gas condenser; includes adding a chemical treatment to the exhaust gas to neutralize any pH or other imbalances; processing in a preprocessor a pre-fuel composition comprising methanol and ether, and optionally water, where the pre-processor separates the ether from the methanol, and using the ether as the ignition enhancer in fumigating the inlet stream. The system involves adding water to the methanol-based fuel for powering the engine using methanol-water fuel; transporting the fuel from a fuel manufacturing plant to the engine location; transporting the pre-fuel composition from a fuel manufacturing plant to the engine location. EXAMPLE - No suitable example is given.