Biomass, including crop straw, firewood, can be used for energy, kelp, kelp and made by microbial fermentation of methane and alcohol, obtained from the thermo-chemical approach to synthesis gas and methanol, as well as fuel oil extraction from plant energy crops and so on, is the world’s most extensive kind of renewable energy. It is estimated that each year produced on Earth through photosynthesis, biomass, total 1440? 180 billion tons (dry weight) equivalent to the current total world energy consumption of 3-8 times. However, there is much practical use of biomass is not so much, and the use of very high efficiency. According to statistics, the total biomass energy consumption has accounted for just 6% -13% in consumption of larger developing countries, accounting for about 30% of the total.

The main task of the current development of biomass: First widely grown energy crops, including planting firewood, crops with high oil content, oil tree, etc.; the second is to strengthen the biomass gasification, liquefaction, fermentation, thermal chemical treatment, the Health material can be converted to chemical energy and electrical energy, improve energy efficiency.

Looking back at human history, biomass energy has the oldest. Dated to 50 million years ago, living in the Beijing Zhoukoudian Peking Man region is the land of China who earlier use of fire. 30 years of the 20th century, archaeologists living in Peking Man’s cave, found a 6-meter thick fouling layer can still be found from the ashes of burnt wood charcoal Jing, Chinese Hackberry seeds, so that the promotion of human evolution The first fire comes from firewood. In the 50 years of long years, firewood as the main energy has Lenovo C200 battery been to contribute to mankind.

Until 1860, the energy consumption of firewood in the world, also occupies the first place, the proportion was 73.8%, and later, with the coal, oil and natural gas, a lot of fossil energy development, use and pay for energy directly to the proportion of carbon gradually decreased. In 1910, world energy consumption in China, the use of firewood decreased to 31.7%, while coal use has increased to 63.5%. Is such that today the vast rural areas in some countries, firewood remains the main source of energy is often used. Around the world, because excessive consumption of coal and oil, energy crisis occurs, together with coal and other fossil energy pollution of the environment seriously, so firewood and other biomass energy cultivation, development, use, once again aroused attention. However, re-use of firewood can, never will use the original fuel, but the artificial planting of fast-growing trees, or plants with high oil content. In use, it will not burn firewood energy directly, but through the gasification and liquefaction, processing, full use of its heat.

The current use of biomass to the world step by step approach, generally have the following.

1. Thermo-chemical conversion method: get charcoal, tar and combustible gases and other high-grade energy products, the method has its thermal processing methods, divided into high temperature carbonization, pyrolysis, liquefaction of biomass and other methods.

2. Biochemical conversion method: The main means of biomass in microbial fermentation, the generated gas, alcohol and other energy products.

3. The use of plant oil produced bio-oil (eg, Capers, Green Yu-oil trees).

4. The extruded form of biomass fuel in order to focus on the Compaq 2210B battery use and improve thermal efficiency. The development of pay-carbon energy has many advantages.

First of all, fuel energy is renewable energy, as long as the trees on the ground, can be adopted during the growing season, chlorophyll photosynthesis, the solar energy fixed in the woods. It is estimated that the world’s forests every year fixed solar energy, equivalent to more than 900 million tons of standard coal, which is a treasure trove of potential energy.

Besides, species of firewood is simple, low cost and effective, and the trees although the mechanism of fixed chemical energy complex, but can naturally be, does not require manual manipulation, and solar energy stored in the tree, which used to take. A seed planted, the trees to grow, they do not destroy it, the long term storage of energy.

Third, non-sulfur diesel firewood and other harmful elements, low level air pollution when burned, combustion ash is a good potash. So is a clean fuel.

Fourth, more importantly, the tree during photosynthesis, the absorption of carbon dioxide in the air. When burned, release carbon dioxide back to the air in turn, maintain a balanced composition of the atmosphere.

Fifth, the forest can sand-fixing, water conservation, improve the climate and landscape, these are the energy of other minerals that could not be compared.

The development of fuel, choose tree species is important. Xishuangbanna in Yunnan Province in China’s pension peoples since ancient times occupying woodlands, but they do not use from the hills are covered with wood, they only burn a kind called “chestnut tree” of the fast-growing trees, this tree a good quality, fast growth, combustion slow, fire intensity, smoke small, not deep-fried Mars is the Dai people love the forest environment optimized for the best firewood trees.

Central American output of a “new Leucaena tree”, it grows rapidly, adaptable, well-developed root system, reproduction is easy. Because of this tree, high yield, wide use, known as the miracle tree planting has been introduced into our country. In addition, Chai Suihuai, sea buckthorn, Lin Ephedra, Pinus, Canada Yang, Quercus, Robinia, Salix, Caragana, acid thorns are all firewood in the crowd.

Philippines has a Nengchan diesel “diesel tree” can produce 5 kg per tree oil; Brazil has a tropical rain forest called “bitter with Pakistan,” the oil tree trunks can be “cut oil”, each tree annual output of 20 kg oil; China’s Hainan Island on the tree, oil, a tree can produce 25 kilograms of ProBook 4510s battery oil. University of California, trained using genetic engineering method “oil star tree” per acre (4046 square meters) annual output of 10 barrels of oil can be continuously harvested 20-30 years.

In summary, biomass resources are very extensive and rich, is the alternative to fossil fuels, reduce pollution, “green fuel”, rational use of biomass, can be turned into harm into, and its prospects are very bright. From the principle of speaking, biomass is solar energy converter, is a renewable energy resource, inexhaustible; modern technology to foster development of biomass energy to create the conditions for human beings to provide cheap, clean , efficient and convenient fuel.

However, biomass is also inadequate, for example, the low calorific value and thermal efficiency, bulky and difficult to transport, direct combustion of biomass thermal efficiency of only 10% -30%. Therefore, rational and effective use of biomass, but also the development of advanced biomass and practical use of technology.