Views: 0 Author: Site Editor Publish Time: 2011-05-03 Origin: Site
Convert waste gas into green energy through photosynthesis plants
It is estimated that the energy stored by plants every year is about 10 times the world's main fuel consumption; and the amount used as energy is less than 1% of the total amount.In order to complete the carbon cycle of nature, most of these unused biomass are naturally decomposed to release energy and carbon and return to nature.Biomass combustion is a traditional utilization method, which not only has low thermal efficiency, but is also labor-intensive and causes serious pollution.
Biomass energy conversion technology can efficiently utilize biomass energy to produce various clean fuels, replace coal, oil and natural gas and other fuels, and produce electricity.And reduce dependence on fossil energy, protect national energy resources, and reduce environmental pollution caused by energy consumption.Experts believe that biomass energy will become an important part of sustainable energy in the future. By 2015, 40% of total energy consumption will come from biomass energy.
significance:
1. Alleviate my country’s energy shortage and ensure energy security.
2. Control organic waste pollution and protect the ecological environment.
According to statistics from the International Energy Agency, the remaining years for these three energy sources to be exploited are only 40, 50 and 240 years respectively.The development of new energy has become an urgent issue in human development. Nuclear energy will also develop. Five new energy sources, namely solar energy, wind energy, geothermal energy, wave energy and hydrogen energy, will be prioritized for development and utilization in the future.Although our country has proven coal reserves of 600 billion tons, oil of 7 billion tons, and hydropower of 680 million tons, our country's total energy utilization rate has exceeded 30% since 1978, energy distribution is uneven, energy output is low, and rural energy supply is in short supply. and other factors, leading to tight energy supply.The development and utilization of bioenergy can play a significant mitigating role in this regard.Especially under the conditions of annual rural production of 32.25 million tons of rice husks, 12.5 million tons of corn cobs, 4 million tons of sugarcane bagasse, 2 million tons of cottonseed hulls, 300,000 tons of furfural residue, and 13.8 million tons of human and animal excrement, the annual output can be produced by the action of microorganisms. The biogas reaches 14.28×108m3, which is equivalent to 25.94×106t standard coal, thereby changing the current energy shortage situation in rural areas.
According to the current domestic and foreign research levels, there are still many technical uncertainties in fuel cell vehicles, electric vehicles, hydrogen-powered vehicles, etc., and it is unknown when they will be put into operation.Hybrid vehicles are expensive to build and still consume mainly refined oil.On the other hand, petroleum is not only used as a power source for transportation, but chemical products such as ethylene derived from it are also basic materials that are more widely used than steel.Therefore, the development of bioenergy is an inevitable path. It can solve the problem of vehicle fuel in the immediate future and solve the energy and raw material problems in the post-petroleum era in the medium and long term.
At present, bioenergy technology is relatively mature internationally. The routes to replace petroleum are: grains, straw, other plants, etc. - fermentation - ethanol - vehicle oil, ethylene and hundreds of chemical and raw material products; the other is to use inferior quality products. Edible oil, jatropha seeds, etc. are directly processed to produce vehicle diesel.No matter what kind of biomass conversion, it is the 'long leg' of our country's resources.The development of bioenergy is an opportunity for large agricultural countries and the current resource situation of 'short of oil and abundant coal' to turn shortcomings into gains.
Our country is currently causing serious environmental pollution due to the use of energy. For example, the annual emissions of smoke and SO2 are 28.57 million tons, the annual average emissions of burned garbage are 5.73 million tons, and the destruction of forest vegetation due to the use of firewood results in annual soil loss of 5 billion t.Using biological energy to produce energy and utilizing it not only eliminates environmental pollution problems, but also alleviates the current seriously polluted environmental situation.
Coal and oil, which have played 'protagonist roles' in the fuel kingdom for hundreds of years, were produced by animals and plants in ancient times. So, can energy crops be grown and fuel produced directly from energy crops?This is a new issue of widespread concern in the 21st century.The ideal biofuel crop should have photosynthetic ability, and so far, scientists have discovered more than 40 plants that can produce 'oil'.
Biomass energy is the solar energy stored in plants on the earth through the photosynthesis of plants and solar energy. It has the potential to become one of the major new energy sources in the 21st century.It is estimated that the energy stored by plants each year is equivalent to 10 times the world's major fuel consumption, but its use as energy is less than 1% of the total.Through biomass energy conversion technology, biomass energy can be used to produce various clean fuels to replace coal, oil, natural gas and other fuels.It can be seen that the development of biomass energy plays an important role in ensuring my country's future energy security.
Experts analyze that oil is no longer an ideal automobile fuel for sustainable development. There are four major problems in over-reliance, including: the dual risks of domestic resource shortages and fierce international oil competition; the performance of gasoline and diesel can no longer meet the high level and high cleanliness requirements of automobiles. Requirements for sustainable development; oil prices remain high, increasing user burdens; relying on imports costs a lot of foreign exchange, affecting domestic employment.Huge purchases will put my country's crude oil into a 'price trap' similar to the current iron ore market.To adapt to automobile consumption needs, it has become an inevitable trend to build a vehicle fuel substitution system.
It is understood that the current number of cars in China exceeds 20 million and will reach 50 to 60 million in 2010.By then, the annual domestic automobile production volume will reach more than 10 million units, and the automotive refined oil market will be worth hundreds of billions of yuan.On the other hand, environmental protection forces China to adopt alternative oil technologies.Big cities such as Beijing and Shanghai implemented measures such as replacing oil with natural gas for public transportation vehicles earlier, mainly due to environmental factors.At present, natural gas, coal, biomass energy and other technical routes have replaced petroleum, and their combustion emissions are about 40% less than petroleum.According to my country's urbanization process, 400 million people will 'move into cities' before 2020, and car ownership will increase dramatically. Without the use of clean alternative energy, it will be impossible to maintain a suitable urban living environment for humans.Someone calculated this: In a big city, based on the daily use of 15KG of gasoline and diesel per vehicle, 1 million vehicles use 15,000 tons of gasoline and diesel, which will deplete 183.38 million cubic meters of oxygen in the air, turning it into water containing only Oxygen-free gases such as carbon dioxide and nitrogen.And because carbon dioxide is much heavier than air, most of it is distributed near the ground and can accumulate up to 1.83 meters thick within an area of 100 square kilometers, which is a palm taller than a normal Chinese person.What a terrible scene it would be without the air flow given by nature.
