Handbook of Cellulosic Ethanol

Advantages of Biofuels

Common biofuels include bioethanol, biomethanol, vegetable oils, biodiesel, biogas, biosynthetic gas or biomass-derived syngas, bio-oil, bio-char, and bio-hydrogen. The benefits or advantages of biofuels can be broadly classified into three groups: economic, environmental, and energy security and these factors are outlined below [9, 6].

Economic impacts:

• Sustainability in relation to economic growth

• Increased number of rural manufacturing jobs in biorefinery

• Opportunity for certain developing countries to reduce their dependence on oil imports

• Increased investments in plant and equipment

• Fuel diversity

• Agricultural development

• International competitiveness, especially for develop­ing countries with land resources

Environmental impacts:

• Greenhouse gas reductions

• Reduction of air pollution—bioethanol's high oxygen content reduces carbon monoxide levels more than any other oxygenate

• Biodegradability

• Improved land and water use

• Carbon sequestration

Energy security:

• Supply reliability independent of international politi­cal climate

• Ready availability

• Ability to set domestic targets for production and markets

• Domestic distribution

• Renewability

In addition to these, there may be other socio-economic and environmental implications for developing countries to benefit from increased global demand for biofuels. In developed countries there is a growing trend towards employing modern technologies in large-scale production of biofuels. Furthermore, with recent advances like genetic manipulations of microorganisms, and effi­cient bioenergy conversions, biofuels are becoming cost competi­tive with fossil fuels [10].

Handbook of Cellulosic Ethanol

Disadvantages of Ethanol

There are a few disadvantages to ethanol when compared to gaso­line, including: 1. Lower energy density in ethanol is the most signifi­cant disadvantage. A kilogram of ethanol has about 66% …

Handbook of Cellulosic Ethanol

The inevitable decline in petroleum reserves and the rise in demand for oil from rapidly growing economies have caused soaring oil prices, and coupled with climate change concerns have contributed …

Biodiesel Education Grants

Competitive grants are available through the Biodiesel Fuel Education Program (Section 9006) to educate governmental and private enti­ties that operate vehicle fleets, the public, and other interested enti­ties about the …

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