Alternative Energy: Fuel From Algae

Maybe we rarely hear about Algae. But we just know it only in biology subject in the schools or collages. Algae are a large and diverse group of simple, typically autotrophic organisms, ranging from unicellular to multicellular forms. The largest and most complex marine forms are called seaweeds. They are photosynthetic, like plants, and "simple" because they lack the many distinct organs found in land plants. For that reason they are currently excluded from being considered plants.

Though the prokaryotic Cyanobacteria (commonly referred to as Blue-green Algae) were traditionally included as "Algae" in older textbooks, many modern sources regard this as outdated and restrict the term Algae to eukaryotic organisms. All true algae therefore have a nucleus enclosed within a membrane and chloroplasts bound in one or more membranes. Algae constitute a paraphyletic and polyphyletic group, as they do not include all the descendants of the last universal ancestor nor do they all descend from a common algal ancestor, although their chloroplasts seem to have a single origin.

Algae lack the various structures that characterize land plants, such as phyllids and rhizoids in nonvascular plants, or leaves, roots, and other organs that are found in tracheophytes. Many are photoautotrophic, although some groups contain members that are mixotrophic, deriving energy both from photosynthesis and uptake of organic carbon either by osmotrophy, myzotrophy, or phagotrophy. Some unicellular species rely entirely on external energy sources and have limited or no photosynthetic apparatus.

Nearly all algae have photosynthetic machinery ultimately derived from the Cyanobacteria, and so produce oxygen as a by-product of photosynthesis, unlike other photosynthetic bacteria such as purple and green sulfur bacteria. Fossilized filamentous algae from the Vindhya basin have been dated back to 1.6 to 1.7 billion years ago.

The first alga to have its genome sequenced was Cyanidioschyzon merolae.

Today, Algae is one of alternative energy that can be used for renewable fuel. Energy from Algae presents an opportunity you cannot afford to ignore. Deriving energy from algae is considered the Holy Grail of alternative energy. Algae, a third-generation biofuel feedstock, present one of the most exciting possibilities as a future solution to our energy problems, especially that of transportation fuel. In the last few years, activity in this field has been accelerating fast.

Why are algae so exciting from a renewable energy standpoint? For a number of reasons :

• The yields of oil and fuels from algae are much higher (10-100 times) than competing energy crops
• Algae can grow practically anywhere, thus ensuring that there is no competition with food crops.
• Algae are excellent bio remediation agents - they have the potential to absorb massive amounts of CO₂ and can play an important role in sewage and wastewater treatment.
• Algae are the only feedstock that have the potential to completely replace world's consumption of transportation fuels.
• Algae are already being used in a wide variety of industries and applications, and many newer applications are being discovered. Such a wide range of end-uses enable companies to produce both fuels and non-fuel products from the same algae feedstock

Algae can produce several fuel products, there are:

• Bio diesel
  
• Hydrogen
• Methane
• Ethanol

Renewable Energy: Hydrogen Fuel

Today, the fossil fuel slowly depleted. All of researcher in the world has trying to find the others kind of fuel. Now, the researchers has one of new solution. Hydrogen Fuel.

Hydrogen is one of two natural elements that combine to make water. Hydrogen is not an energy source, but an energy carrier because it takes a great deal of energy to extract it from water. It is useful as a compact energy source in fuel cells and batteries. Many companies are working hard to develop technologies that can efficiently exploit the potential of hydrogen energy. This page lists articles about hydrogen fuel as an alternative energy source.

Hydrogen fuel enhancement is a term used to describe the use of a mixture of hydrogen and conventional hydrocarbon fuel in an internal combustion engine (ICE). The hydrogen can be stored as a second fuel, reformed from the conventional fuel, or in theory produced through the electrolysis of water.

There has been a great deal of research into fuel mixtures, such as gasoline and nitrous oxide injection. Mixtures of hydrogen and hydrocarbons is no exception. These sources suggested that there could be fuel efficiency saving and reduced emission through the addition of hydrogen to conventional fuels. For example, one research project added hydrogen to an automobile engine to run the engine leaner:

Lean-mixture-ratio combustion in internal-combustion engines has the potential of producing low emissions and higher thermal efficiency for several reasons. First, excess oxygen in the charge further oxidizes unburned hydrocarbons and carbon monoxide. Second, excess oxygen lowers the peak combustion temperatures, which inhibits the formation of oxides of nitrogen. Third, the lower combustion temperatures in­crease the mixture specific heat ratio by decreasing the net dissociation losses. Fourth, as the specific heat ratio increases, the cycle thermal efficiency also increases, which gives the potential for better fuel economy.

Many of these sources have also warn that it would require modifications in ICE's air/fuel ration, engine timing, and other design elements to realize these advantages. This would be expected for any change in an engines fuel composition.

Hydrogen fuel enhancement from electrolysis has been promoted for use with diesel trucks and often with adaptation of the water-fuelled cars scam. However recent tests by consumer watch groups have shown negative results.

Energy TODAY!

In our attempts to educate in building energy saving design, dimensioning and operation, it was more and more obvious to us, that our efforts had to be positioned in a bigger picture. To do so, we have to get in to energy production and resources, as well as other areas of energy use. Our efforts have especially large synergy and interdependence with renewable energy. Major energy savings and a more efficient use, can have very large impacts on the implementation of renewable energy.

Fossil energy runs the engines, politics and economy of the world. Today, use of fossil energy is not only wasteful, but is also destroying the environment we live in. Our use of fossil energy kills millions of people every year, by pollution, and almost all conflicts and wars the last 100 was about energy.

Fossil fuels are valuable natural energy sources which required several millions of years for their creation but are now rapidly being depleted. The prominent worry that fossil fuels will run out was reported almost 30 years ago by the influential book Limits to Growth. This book reported a series of computer simulations of future resource use in which world fuel consumption continued to rise exponentially. The predicted result was an ultimate collapse in fuel supplies, regardless of the amount of fuel assumed to be available.

At some moment during the next five years, we will have consumed more than one half of the total usable fossil oil on Earth. To date, we have extracted 807 billion barrels of crude oil. Only an estimated 995 billion barrels remain that can be extracted at current production costs. If the world-wide rate of oil consumption remained a constant 24 billion barrels of oil per year, we would run out of oil in 2040. But consumption is not static-it is increasing by about 2 percent per year. It seems clear that demand for oil will overshoot supply well before 2040. At some point between 2010 and 2025, all fuel from fossil oil will be too expensive for the average consumer to afford. Exactly when that point comes will depend largely on the actions of Middle Eastern countries.

In 1970, world-wide annual consumption of natural gas was 850 billion cubic meters. Today, annual consumption is over 2000 billion cubic meters and is increasing at 3.5 percent per year. A 3.5 percent annual increase in consumption will deplete natural gas reserves by 2050. However, the increase in consumption of natural gas is accelerating at an astonishing rate. Cheap supplies of natural gas will be depleted by 2040.

This fact is recently completely neglected by power companies which are building new natural gas power stations to give customers in their area cheaper and cleaner electricity. Experts believe that by 2010, the supply of electricity from new natural gas power facilities will jump to 100,000 megawatts in USA alone. Natural gas power plants are attractive to investors. They have relative short pay back time (an average six year in the USA) and can produce electricity for a cheap rate of two to three US cents per kilowatt-hour. It seems clear that the demand for natural gas fuel will increase in the near future but will slow down in the second half of the next century.