Handbook of Cellulosic Ethanol

Biofuels

Biomass-derived fuels or biofuels are an important contributor in the modern renewables slice of the energy source distribution pie chart shown in Figure 1.2. The use of biogas in heating houses, biogas-derived syngas in electricity generation and transport bio­fuels are some of the major applications in this type of sustainable energy. Biofuels are produced from bio-based materials through various paths such as biochemical [5, 6], and thermochemical meth­ods [7, 8]. In general the use of unprocessed biomass forms like firewood for heating or cooking purposes are not included in this group. Chemically, many forms of biofuels contain oxygen as one of the elements, whereas petroleum fuels are hydrocarbons free of oxygen. Another important difference is the sulfur level; all bio­fuels are very low in sulfur in comparison to petroleum fuels and many have low nitrogen levels as well.

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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