What exactly Biofuels?

July 29, 2008 by micro-e  
Filed under Biodiesel, Energy

Biofuels provide a potential route to avoiding the global political instability and environmental issues that arise from reliance on petroleum. Currently, most biofuel is in the form of ethanol generated from starch or sugar, but this can meet only a limited fraction of global fuel requirements. Biofuels are a dead end that will slow the adoption of the only feasible solution for personal highway travel. Electrical cars powered by batteries or capacitors are the most technically available and environmentally benign solution. Biofuels are considered neutral with respect to the emission of carbon dioxide because the carbon dioxide given off by burning them is balanced by the carbon dioxide absorbed by the plants that are grown to produce them. The use of biofuels as an additive to petroleum-based fuels can also result in cleaner burning with less emission of carbon monoxide and particulates.

Biofuels in the North are generally derived from feedstocks such as corn and rapeseed that have low energy efficiency and require expensive inputs. And since most arable land in the North is already under cultivation, biofuels are likely to compete with food crops if expansion continues. Biofuel will affect the Amazon rain forest in four ways. First, there will be increased biofuel production in some form. Biofuel means using biological material for energy. Like burning wood in a woodstove for heat.
Read more


If you're new here, you may want to subscribe to my RSS feed. Thanks for visiting!

How to Use Biomass Energy?

June 15, 2008 by micro-e  
Filed under Biomass, Energy

There are many different ways to use biomass energy. Today, we are going to look at four different categories: biofuels, biopower, bioproducts, and space heating and cooling.

Biofuels

The two most common types of biofuels are ethanol and biodiesel. The most familiarly used form of ethanol is made from the starch in corn grain, and it is added into petroleum-based fuels to reduce toxic air emissions and increase octane. It is also available as an alternative fuel known as E-85. This type of fuel contains 83% ethanol during the summer and 70% in the winter.

Biodiesel, on the other hand, is made from soybean oil. Though not as popular as its ethanol counterpart, it has significant benefits to air quality. Biodiesel is usually mixed at 20% with petroleum diesel, and it is called B-20. The same process that is used to create biofuels can also be used to create antifreeze, plastics, glues, artificial sweeteners and toothpaste gels.

Biopower/Biopower

The only renewable electrical generation that is used more than biopower is hydropower. Biomass is created using direct combustion using conventional boilers that burn waste wood products. Steam is produced by this combustion, which, in turn, spins a turbine, activating a generator that creates electricity.

When biomass is turned to gas prior to this combustion, toxic materials are removed from the process. These systems are useful for powering isolated communities with electricity. There are significant amounts of biomass resources in the eastern half of the United States.

Bioproducts

Bioproducts are products that can be made from fossil fuels. These products general require a reduced amount of energy to create than petroleum-based products. If oxygen is present when heating biomass, more of the two gases produced. This process is called biosynthesis, and it can be utilized to create plastics and acids. These, in turn, can be used to create photographic films, textiles, and synthetic fabrics.

On the other hand, when biomass is heated without oxygen, pyrolysis oil is formed and phenol can be extracted from this formation. Wood adhesives, molded plastics, and foam insulation can then be created from phenol.

Space Heating and Cooling Read more


Biodiesel - The Facts On What Is Going On

April 26, 2008 by micro-e  
Filed under Biodiesel, Energy

Any fuel made to drive a diesel engine is called diesel fuel. Most people are familiar with petrodiesel, and don’t even bother to add the prefix. But advances in physical and chemical biomass conversion and processing have made the term biodiesel a term that may not yet be commonplace but has probably been heard by most adults in developed nations. The usual sources for biodiesel are oils and fats, which are mixed with a solution of methanol that contains sodium hydroxide (lye, an extremely caustic substance). Amazingly, the eponymous Rudolf Diesel demonstrated biodiesel at the 1900 Paris World Exposition using an engine that ran on peanut oil. Gasoline engines rely on a spark to fire, and can be quite finicky about fuel, but diesel engines depend on high cylinder compression to heat and ignite the air/fuel mix, so many modern diesel engines can run on 100 percent biodiesel and others can run on petro-bio mixes. That’s good news for the air: according to the Department of Energy, pure biodiesel emits 75 percent less CO2 than petrodiesel, and mixes by anywhere between 75 and 15 percent.
Read more