Analysis on the current situation and future devel

2022-08-14
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Analysis of the current situation and future development prospects of bioenergy development in China

the development of productivity makes human demand for energy more and more, and the severe energy problem has increasingly become a prominent issue of concern all over the world

scientists point out that the fossil energy accumulated on the earth for hundreds of millions of years (oil makes the performance and function of products backward, natural gas, coal, etc.), which can only support 300 years of large-scale exploitation, will face depletion. Photoelectric displacement sensors are often used for continuous measurement of wire diameter or as edge position sensors in strip edge position control systems. People finally realize that the use of fossil energy is not unlimited. Taking precautions and developing bioenergy with modern technology is an important way to solve the future energy problem

bioenergy (also known as green energy) refers to the energy obtained from biomass, which is the earliest energy used by mankind. The ancients were actually using bioenergy to make fire by drilling wood and burning charcoal. However, the direct combustion of biomass to obtain energy is inefficient and uneconomical. With the process of industrial revolution and the large-scale use of fossil energy, bioenergy is gradually replaced by fossil energy represented by coal and oil and natural gas

"everything grows by the sun". Bioenergy is transformed from solar energy. As long as the sun is not extinguished, bioenergy will be inexhaustible. The transformation process is to synthesize carbon dioxide and water into biomass through the photosynthesis of green plants. The use process of bioenergy generates carbon dioxide and water, forming a material cycle. Theoretically, the net emission of carbon dioxide is zero. Bioenergy is a renewable and clean energy. The development and use of bioenergy is in line with the concept of sustainable scientific development and circular economy. Therefore, using high-tech means to develop bioenergy has become an important part of the energy strategy of developed countries in the world

at present, the main forms of bioenergy include biogas, bio hydrogen production, biodiesel and fuel ethanol

biogas is a mixed gas produced by microorganisms fermenting straw, livestock manure and other organic substances, and its main component is combustible methane. The equipment for producing biogas is simple and the method is simple, which is suitable for popularization and use in rural areas. Biogas has been used in many rural and livestock farms in China. The popularization and use of biogas not only saves resources, protects the environment, but also improves the quality of life of farmers. At present, the large-scale production of biogas needs to solve the technical problems such as equipment and increasing the content of methane

the combustion product of hydrogen is only water, so hydrogen is the cleanest energy. Hydrogen can be obtained from biomass through microbial fermentation, which is called biological hydrogen production. At present, Chinese scientists have obtained microorganisms that can produce hydrogen efficiently, which can produce hydrogen on a small scale. However, there are still many technical and economic problems to be solved in order to realize the industrialization of biological hydrogen production

biodiesel is a liquid fuel obtained by decomposing vegetable oil or other oils with biological enzymes. As a substitute for diesel, it is more environmentally friendly. Europe has specially planted oil crops to produce biodiesel, forming a certain scale, and the United States also has small-scale production of biodiesel. The problem with biodiesel is the high cost of vegetable oil as raw material. In China, there are many scientific groups engaged in the research and development of biodiesel. Recently, scientists found that some microorganisms can also synthesize oil, which may play an important role in overcoming the raw material problem of biodiesel

fuel ethanol is currently the largest bioenergy in the world. Ethanol, commonly known as alcohol, can be used as vehicle fuel by mixing gasoline in a certain proportion. It can not only replace part of gasoline, but also emit cleaner exhaust. China's fuel ethanol production has formed a scale, mainly using corn as raw material. At the same time, it is actively developing sweet sorghum, potato, straw and other raw materials to produce ethanol. At present, the output ranks third in the world

although the development and utilization of bioenergy is in its infancy in China or the world, the proportion of bioenergy in the whole energy structure is still very small. However, the development potential of bioenergy is immeasurable

the Chinese government attaches great importance to the development of bioenergy. As early as the 1950s, biogas was popularized in rural areas, and has made remarkable achievements. At the beginning of this century, the state decided to develop fuel ethanol, and successively established large-scale fuel ethanol production enterprises of gypsum board gb/t9775 (1) 999 in Northeast, central and eastern China, and formulated relevant gasoline alcohol standards. Gasoline alcohol has been used in cars in some provinces and cities. The state has also invested considerable efforts in organizing scientific research and scientific and technological research on bioenergy, and has achieved gratifying results. It has reached a high level in productivity microbial research, biotransformation research, process and equipment research

China is rich in biomass resources, producing about 500 million tons of grain and more than 700 million tons of straw every year. Apart from being used for feed, fertilizer and other industrial raw materials, at least half of it can be used for bioenergy. Together with livestock manure, forest processing residues, etc., China's existing biomass resources available for development for bioenergy have reached at least 450 million tons of standard coal, which is equivalent to the wear performance of single or multiple steel wire friction pairs, steel pipe friction pairs, and rubber pipe friction pairs evaluated, which is 40% of China's total primary energy consumption in 2000. In addition, there are about 2billion mu of barren mountains and wasteland suitable for agriculture and forestry in China that can be used to develop energy agriculture and energy forestry

according to experts' estimates, in the next 30 years, China can develop at least 2 billion tons of bioenergy. With the development of nuclear energy, hydro energy, wind energy, solar energy and geothermal energy, as well as traditional fossil energy and the development of various energy-saving technologies, China's energy supply is sufficient to support the rapid and sustainable development of China's social economy. The "China energy threat theory" spread by some people abroad is groundless

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