Biobutanol - 1-Butanol Energy content closer to gasoline...

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Unformatted text preview: 1-Butanol Energy content closer to gasoline (93 octane too!) Much less hydroscopic than ethanol Higher boiling point (116 oC) Higher flash point (~35 oC) Soluble in “normal petroleum fuels” Freezing point minus 90 oC! Kills most “bugs” at high concentrations Bulk transport in existing network (e.g. pipelines) Biobutanol from fermentation of a starch/ glucose source Starch/glucose feedstock Immobilized cell reactor • • • • butyric acid biobutanol Two stage system: Extract & hydrolyze, fermentation Patents OSU 5,563,069 & Environmental engineering 5,753,474 Published performance: 2.5 gal/bushel or 0.37 L/kg (~40% conversion to butanol by weight) Dibutyl ether can be made from butanol in high yield. • Some Key data for “diesel” fuel components • Compound ait Fp m.p. (oC) • b.p. (oF) (oC) Cetane index (oC) • Butanol (C4H9OH) 116 649 35 -90 25 • dibutyl ether (C4H9OC4H9) 142 365 25 -98 >75 • cetane (C16H34) 287 395 135 18 100 • 1-Me-naphthalene 240 984 82 -22 0 1-butene to mixed hydrocarbons CH3=CHCH2CH3 * catalyst dimer trimer * * tetramer (C16) and so ................ Overall Process Cellulose feed (new or waste) Microwave assisted hydrolysis (US patent 5,196,069, NASA 1993) Conversion to JB3-5 using China Lake Proprietary Catalyst/conditions Research catalysts Glucose feedstock for fermentation 1-butanol 40% by weight using OSU patented bacteria (via license agreement) or new strain developed Conversion to 1-butene during biorefining process to conserve energy use (i.e. concurrent with biobutanol distillation/isolation) Jet Fuel Energy Flow Diagram 1 Kg of Glucose (or Cellulose) 15.7 MJ C6H12O6 2830 KJ/mol Conversion to 1-butanol: 40% by weight C4H10O ~37 MJ/Kg 14.8 MJ energy content for 0.40 Kg Conversion to JB3-5 at 75%: 0.21 Kg Conversion to 1-butene: Chemical yield 90% By weight = 0.28 Kg (C12H26) 45+ MJ/Kg Energy Yield: 9.45 MJ or 60% C4H8 ...
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This note was uploaded on 01/16/2012 for the course ENVIRON 404 taught by Professor Rasmussen during the Fall '11 term at University of Michigan.

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Biobutanol - 1-Butanol Energy content closer to gasoline...

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