China's biodiesel production process has been in the forefront of the world, and China can produce the best biodiesel in the world with the worst raw material (waste oil). The future of biodiesel is bright, and it will become a substitute for oil in the future. Although it is still a long way from popularization, the whole world is working hard in this direction now, and the dawn can be seen. And what do you know about the advantages and disadvantages of biodiesel?

Biodiesel made from waste animal and plant oils has many advantages, whether it is used as fuel or for other purposes:

1. Biodiesel is very similar to petrochemical diesel, so it does not need to modify the engine when used as diesel fuel, and its storage is the same as petrochemical diesel.

2. Biodiesel used as automobile fuel can reduce the emission of (CO2, CO2) in tail gas by 81% and sulfur oxide by 111%, which can reduce unburned hydrocarbons >: 91%, reducing aromatics by 75-91% and carcinogens by 91%.

3. The CO2 produced by biodiesel combustion is much lower than the CO2 absorbed by plants in the whole growth process, which is beneficial to alleviate the greenhouse effect.

4. Biodiesel contains 11% oxygen, basically contains no sulfur, and has excellent lubricity, which has no influence on fuel consumption, fuel ignitability, output power and engine torque.

5. Because the raw materials are animal and vegetable oils, biodiesel is also renewable.

6. Biodiesel is environmentally friendly, contains no benzene or other carcinogenic polycyclic aromatic hydrocarbons, and has a low content of volatile organic compounds (VOCs).

7. Biodiesel has high safety and high flash point, which is about 71℃ higher than petroleum diesel, so it is not necessary to consider it as flammable.

8. Biodiesel is easy to biodegrade, and its biodegradability is four times faster than that of petroleum diesel. After 28 days, biodiesel can degrade 85-88% in water, which is the same as the degradation rate of glucose, and the harm caused by accidents flowing into land or water is extremely low.

9. The toxicity of biodiesel is low, and the lethal dose of acute oral toxicity >: 17.4g/kg body weight, which is one tenth of the toxicity of salt; Relatively speaking, it is relatively safe. It must be fuel, not drink.

11. The irritation to skin is low, and the irritation of undiluted biodiesel to human skin is less than that of 4% soapy water.

But in addition to the above advantages, biodiesel also has some disadvantages:

1. The calorific value of biodiesel is slightly lower than that of petroleum diesel.

2. When biodiesel is used as automobile fuel, nitrogen oxides (? NOx? ) emissions are slightly higher than those of petroleum diesel.

3. Raw materials have a great influence on the properties of biodiesel. If the content of saturated fatty acids such as palmitic acid or stearic acid in raw materials is high, the low-temperature fluidity of biodiesel may be poor. If the content of polyunsaturated fatty acids such as linoleic acid or linolenic acid is high, the oxidation stability of biodiesel may be poor, which needs to be solved by adding corresponding additives.

4. in the production process, under the national "four noes" policy of "not competing with grain", "not competing with people for grain", "not competing with people for oil" and "not polluting the environment", the raw materials for refining biodiesel can only be oil crops or waste oil, and the collection of waste oil is a difficult problem.

To deal with the disadvantages of biodiesel, we must vigorously develop the biodiesel crop industry and solve the problem of biodiesel raw materials.

China should focus on the large-scale planting and popularization of woody oil plants and accelerate the technological innovation and industrialization of microbial oil fermentation. At the same time, plant genetic breeding technology is used to increase the yield of oil crops and selectively develop oil crops that do not compete with grain. Relying on the progress in all aspects, we will develop innovative oil production technologies to ensure the healthy development of China's biodiesel industry and oil chemical industry.

The raw materials of biodiesel can be obtained from gutter oil, vegetable oil and animal fat oil. China is vast in land and abundant in natural resources, and can grow more "plant oil" (that is, bio-gasoline and bio-diesel).

In this respect, many countries have been researching and developing related technologies, shifting from industry to agriculture, and vigorously developing agricultural oil plant planting. "Planting oil" will be a substitute for oil in the future, and it will certainly get the support of the national government. This industry will be the pillar industry of the future country.

In foreign countries, using "engineering microalgae" to produce biodiesel has opened up a new technical way for diesel production. The National Renewable Laboratory (NREL) of the United States has built "engineering microalgae" through modern biotechnology, that is, an "engineering microcystis" of diatoms. Under laboratory conditions, the lipid content of "engineered microalgae" can be increased to more than 61%, and outdoor production can also be increased to more than 41%, while the lipid content of microalgae is 5%-21% in general natural state. The increase of lipid content in "engineered microalgae" is mainly due to the high expression of acetyl-CoA carboxylase (ACC) gene in microalgae cells, which plays an important role in controlling lipid accumulation.

It is of great economic and ecological significance to use "engineering microalgae" to produce diesel oil. Its advantages are: high microalgae production capacity, saving agricultural resources by using seawater as natural culture medium; It is dozens of times higher than the oil yield of terrestrial plants; The biodiesel produced does not contain sulfur, does not emit toxic gases when burning, can be degraded by microorganisms when discharged into the environment, and does not pollute the environment. It is a major trend to develop oily microalgae or "engineering microalgae" to produce biodiesel.

At present, Terry Energy, which has the world's leading pure hydrocarbon bio-energy technology, has launched pure hydrocarbon biodiesel and pure hydrocarbon bio-gasoline.

Different from traditional biodiesel, pure hydrocarbon biodiesel and pure hydrocarbon biodiesel have the same chemical composition, physical and chemical properties and power performance as petrochemical diesel and gasoline. After refining and blending, the quality of the products can meet the national standards of national VI diesel and gasoline, and can be seamlessly connected with petrochemical diesel and gasoline markets. And is a typical green energy product.

Teli Energy has also opened up a new way to solve the problem of biodiesel raw materials: through large-scale outdoor open diatom culture, refining oil as raw materials for biodiesel production. At present, this technology is mature. According to the experimental data, the cultured diatoms can produce 1.21 tons of dried algae per hectare every year, and 36,111 liters of bio-oil can be produced based on 31% of oil extraction. With the continuous improvement of technology in the later period, the production can be continuously increased, and it will become one of the main raw materials sources of pure hydrocarbon bio-energy for Terry Energy in the future.

The future of biodiesel is bright, and it will become the main substitute for oil in the future. Although it is still a long way from popularization, the world is working hard in this direction now, and the dawn can be seen. If we can get government policy support and subsidies, it will be more conducive to the development and popularization of bio-gasoline and bio-diesel.

As a substitute for petroleum, green biodiesel and biodiesel are accelerating the popularization of globalization. Nowadays, the development of various fields is gradually saturated, and new energy will be the next outlet for creating world wealth, and a number of new world-class enterprises will be born. The annual turnover of bioenergy is 41 trillion yuan. Who can eat this "cake"?

end of the full text