Category Archives: Advances in Bioethanol

Processing of Cereal Crops

The main stages prior to fermentation for processing of starch-based materials are Cereal cooking; Starch liquefaction, and Amylolysis. In North America, ethanol is produced from corn by using one of two standard processes: wet milling or dry milling (Yacobucci and Womach 2003; Ferguson 2003) (Figs. 3.8, 3.9). The main dif­ference between the two is in the initial treatment of the […]

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Snowmobiles

Another potential market for the use of ethanol is snowmobiles. Snowmobiles could provide a considerable market for ethanol in USA. There are a total of over 2.3 million snowmobiles registered in the United States. The snowmobile manu­facturers approve the use of ethanol blends of up to 10 %. The use of ethanol in snowmobiles greatly reduces emissions. In the USA, […]

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Characteristics of Fuel Ethanol

Ethanol is more reactive than hydrocarbon fuels, such as gasoline. Since it is an alco­hol, its molecular structure shows a polar fraction due to the hydroxyl radical and a nonpolar fraction in its carbon chain. That explains why ethanol can be dissolved in both gasoline (nonpolar) and in water (polar). Due to its short carbon chain, the prop­erties of ethanol […]

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Future of Bioethanol

The future of bioethanol appears to be bright as the need for renewable energy sources to replace dependence on foreign oil is in high demand. With many nations seeking to reduce petroleum imports, boost rural economies, and improve air quality, world ethanol production rose to 13,300 million gallons in 2012. The success of domestic ethanol industries in the USA and […]

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Historical Perspectives

In 1925, Henry Ford had quoted ethyl alcohol, ethanol, as “the fuel of the future.” He furthermore stated, “The fuel of the future is going to come from apples, weeds, sawdust—almost anything. There is fuel in every bit of vegetable matter that can be fermented.” Today, Henry Ford’s futuristic vision significance can be easily understood.

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Boats/Marine

Ethanol has been shown to be a viable alternative to gasoline for use in recrea­tional boat engines, due to better environmental performance as a fuel over gaso­line (Launder 1999). Many marine/boat manufacturers approve the use of ethanol blends of up to 10 %. Study conducted by Dambach et al. (2004) has proven the ability to retrofit an engine with minimal […]

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Fuel Economy

All vehicles have a fuel economy (measured as miles per US gallon -MPG-, or liters per 100 km) that is directly proportional to energy content. Ethanol contains approx. 34 % less energy per unit volume than gasoline and therefore will result in a 34 % reduction in miles per US gallon. For E10, the effect is small (~3 %) when […]

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About the Author

Dr. Pratima Bajpai is currently working as a Consultant in the field of Paper and Pulp. She has vast experience of 36 years in this field. She has worked at National Sugar Institute Kanpur, University of Saskatchewan and University of Western Ontario in Canada and Thapar Center for Industrial Research and Development in India. Dr. Bajpai’s main areas of expertise […]

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Hydrolysis

The hydrolysis methods most commonly used are acid and enzymatic. Both dilute and concentrated acid is used. Dilute acid treatment is employed for the degra­dation of hemicellulose leaving lignin and cellulose network in the substrate. Other treatments are alkaline hydrolysis or microbial pretreatment with white-rot fungi (Phaenerochate chrysosporium, Cyathus stercoreus, Cythus bulleri, and Pycnoporous cinnabarinus, etc.) preferably act upon lignin […]

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