Bioethanol

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VILNIUS GEDIMINAS TECHNICAL UNIVERSITY
FACULTY OF TRANSPORT ENGINEERING
DEPARTMENT OF AUTOMOBILE TRANSPORT

Bioethanol

Vilnius, 2011
CONTENTS
Introduction…………………………………………………………………………….………..3 1. What is Bioethanol?...........................................................................................................4 2. Bioethanol Production............................................................................................................4 3.1. Concentrated Acid Hydrolysis Process .....................................................................5 3.2. Dilute Acid Hydrolysis ............................... .............................................................5 3.3. Enzymatic Hydrolysis ......................... ......................................................................5 3.4. Wet Milling Processes ......................... .....................................................................5 3.5. Dry Milling Process ......................... .........................................................................6 3.6. Sugar Fermentation Process ......................... .............................................................6 3.7. Fractional Distillation Process ........................ ..........................................................7 3. Ethanol-based engines............................... .............................................................................7 4. Environment.........................................................................................................................9 5. Advatages and disadvantages of bioethanol fuel..................... ..........................................9 6.8. Engine cold start during the winter..........................................................................11 6. Numbers talk...................................................................................................................12 Conclusions............................... .................................................................................................14

Literature............................... .....................................................................................................15

Introduction
      Biomass is a renewable energy supply with increased prospective fuel resource for the generation of steam as well as electricity, transport fuel, pharmacologic producing industries as well as certain substances in the laboratory. The more resourceful utility of biomass, a derivative of Bioethanol is claimed to resolve the global predicament like exhaustion of fossil fuel and global warming due to the gas emissions from grrenhouse effects.

      Research considerations in the subject of bioethanol manufacture from organic waste materials became apparent in the later part of 1980s. Considerable improvements in the extraction of lignocellulosic substance as well as enzymatic hydrolysis have been accounted for in the last ten years or so; nevertheless, sustained investigative endeavors are necessary for the development of technologically practicable and cost-effectively feasible across-the-board enzyme-based biomass-to-ethanol alteration processes. In this paperwork i will talk about bioethanol. How its produced, main advantages and disadvantages.

1. What is Bioethanol?
The principle fuel used as a petrol substitute for road transport vehicles. Bioethanol fuel is mainly produced by the sugar fermentation process, although it can also be manufactured by the chemical process of reacting ethylene with steam. The main sources of sugar required to produce ethanol come from fuel or energy crops. These crops are grown specifically for energy use and include corn, maize and wheat crops, waste straw, willow and popular trees, sawdust, reed canary grass, cord grasses, jerusalem artichoke, myscanthus and sorghum plants. There is also...
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