Why can't diesel engines use vegetable oil directly?

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UAE scientists discover vegetable oil that can replace diesel oil.

Researchers from the University of the United Arab Emirates and Helwan University in Egypt made a bold attempt. They use a vegetable oil as fuel for diesel engines, which is usually used as raw material for high-grade cosmetics and washing products. The results show that the efficiency of this new vegetable oil fuel is no less than that of diesel oil, and it is safer and more environmentally friendly.

This new vegetable oil fuel is taken from a plant called Torchwood. The oil squeezed from the fruit of this plant is called jojoba oil, which has the characteristics of high ignition point and low boiling point. The researchers compared the efficacy of jojoba oil and diesel oil. They added a small amount of methanol and catalyst to jojoba oil to make a fuel called jojoba methanol, and then poured it into a diesel engine equipped with sensors. The test results show that when the engine speed is between 1000 ~ 2000 rpm, the diesel engine can achieve the most suitable torque and power when it is fueled with Jojoba methanol fuel, and the engine working noise is relatively small.

Engineers are very optimistic about jojoba methanol, which releases a lot of heat when burning, has stable chemical properties at high temperature and high pressure, and has obvious advantages as an engine fuel. In addition, the carbon content of jojoba methanol is also less than that of diesel, and the carbon monoxide, carbon dioxide and soot in the exhaust gas produced after combustion are very low. Jojoba methanol does not contain sulfur, does not produce harmful sulfide, and reduces the corrosiveness to steel cylinders. More importantly, the explosion point of Jojoba methanol fuel is much higher than that of diesel fuel, so it is safer to store or transport.

In fact, jojoba oil has always been a special high-grade lubricating oil for aviation, aerospace and precision instruments, and it also has the curative effect of preventing and treating cancer, hypertension, coronary heart disease, stomach disease, trauma and other diseases in medicine, and its application prospect is very broad. In order to extract engine fuel, some farmers in Egypt have begun to plant cupping trees.

However, the researchers said that because oil refining needs a lot of fruits, the large-scale planting of Toona sinensis trees needs the assistance and investment of the government or some private institutions. Moreover, Toona sinensis is only suitable for growing in tropical areas, and is currently only planted in the southwestern United States, arid areas in northwestern Mexico, South America and some countries in the Middle East. It is unrealistic to promote jojoba methanol instead of diesel as engine fuel in the world.

Sun Xianhong's Project of Changing Vegetable Oil into Diesel Oil

□ Times reporter Chen Li special correspondent Guo Wanfu

"yes! It is the edible vegetable oil used to fry oil cakes into diesel oil. " Sun Xianhong loudly responded to the reporter's question.

After writing in Mengniu, Sun Xianhong, former vice president and senior planner of Mengniu Dairy, appeared in front of the media again on Monday.

This time, however, he obviously didn't plan "China astronaut special milk" so calmly. He admits that the prospect of this "world first" project initiated by him is still unclear.

This is a project of "synthesizing environmental protection plant liquid fuel". According to reports, it is made of about 60% vegetable oil and additives. According to a certain proportion, after strict technology and a lot of scientific experiments. "Its index is close to diesel oil, even higher than the combustion value of diesel oil, and atomization and air mixing are good."

Its inventor is Wang Chengdong from Dalian. At the press conference, Wang Chengdong only introduced his name and age, and other relevant academic backgrounds were not introduced. In a material sent to reporters by the newly established Zhongzhi New Energy Co., Ltd., the reporter did not see Wang's academic background, and the words "Mr. Wang" appeared in many places in the material.

Wearing a white coat, Wang Chengdong gave a live demonstration in a slightly empty workshop called New Factory. There are also two notaries and Lin County Notary Office at the scene. The demonstration was held in the gaping eyes of all the people present. If you are there, you will be surprised, because the conversion of vegetable oil into diesel can really be a precedent.

Even more surprising, Niu Gensheng and the county magistrate of Linxian County were also present to watch. Before the demonstration was successful, Sun Xianhong had been exerting his excellent eloquence among reporters. He wants to convince the audience, because such a project seems to have no bottom in his heart.

After about 30 minutes, the fuel that can become a new energy source has yet to be determined. Outside the workshop, the fuel tanks of a taxi, an Iveco and a big truck were emptied under the eyes of a notary. Wang chengdong's fuel enters the fuel tank. Three cars drove out of the factory, leaving a tail gas similar to the smell of cooking fumes.

President Hu Jintao recently warned that China must control the use of energy. The huge energy consumption makes China one of the largest oil importers in the world.

"Although the government has been actively purchasing overseas oil and natural gas resources to provide impetus for the development of China's economy with an annual growth rate of over 9%, it has also been trying to limit its growing dependence on external oil and gas resources by increasing the supply of nuclear power and hydropower." An industry insider said.

Last year, China Offshore Oil (China) Co., Ltd. gave up its bid for United California Oil Company at the price of $6,543.8+$08.5 billion.

The Wall Street Journal said that the thirst for energy led China to expand its acquisition battlefield to Venezuela and Australia thousands of miles away. In the past six months, China signed contracts with a total value of $7 billion to acquire shares in Kazakh, Nigerian and Syrian oil fields. It is reported that a state-owned company in China is considering bidding $2 billion for another Kazakh oil asset. China and Iran are also actively negotiating, and it is expected that a multi-billion-dollar oil and gas agreement will be formally signed within a few weeks.

Sun Xianhong certainly understands these backgrounds. He thinks that the current situation of energy shortage in China has reason for the national high-level officials to pay attention to his current project.

"This is a project that can become the top 500 in the world." Sun is confident.

The arrival of Niu Gensheng seems to be not only because this is Sun Xianhong's project. Years of contact with Morgan forged him into an investment expert, so some people speculated that Niu Lao might invest, but Niu Lao was not an easy man to sell.

At present, the project is only notarized by Lin County Notary Office. According to reports, relevant national patents are also being applied, and no environmental protection department or authoritative scientific research institution rushed to the conference site.

How to promote this project is also a problem.

According to the report of China Business News, at the beginning of last year, the National Development and Reform Commission set up the Foreign Negotiation Working Group of China Coal Indirect Liquefaction Project (hereinafter referred to as "CCWT"), which is responsible for studying, guiding and negotiating matters related to the coal-to-liquid project. Shenhua Group and Ning Mei Group are both members of CCWT. The two groups will separately build coal-to-oil projects, each costing 30 billion yuan, and each project will produce about 3 million tons of petroleum products. Last June, 5438+065438+ 10, Shenhua Company's coal direct liquefaction project was implemented in Shendong Coalfield, Erdos City, Inner Mongolia (reported by the Times). These two projects have attracted the "white-hot" silver mines of British Shell Company and South African Sasol Company.

Sun Xianhong's idea is to try it out in a taxi in Hohhot for free.

Replace diesel oil with vegetable oil

When Dr. Dissel showed his diesel engine at the 1898 Paris World Expo, people only used it for truck and cargo transportation. However, with the oil crisis in 1970s and the high oil price, the world had to re-examine the diesel engine system with the highest fuel efficiency. In the 1980s, diesel vehicles were sold in large quantities by major automakers around the world, accounting for 85% of Peugeot's sales, 70% of Mercedes-Benz, 58% of Isuzu, 50% of Volkswagen, and Audi and Volvo Nissan, all of which were diesel vehicles.

Today in the 2 1 century, oil prices around the world are hovering at high prices again, and people pay more attention to global warming, which stimulates developed countries to continuously study and find substitutes for fossil fuels. New technologies such as extracting alcohol from corn, developing compressed natural gas engines, electric fuel cells, biochemical diesel oil and engines using liquid hydrogen have come out one after another. However, in the short term, there are some obstacles for these new technologies to be put into commercial production in one way or another. However, in the absence of national policy support and tax subsidies, the production cost of biodiesel is higher than that of petrochemical diesel under the current conditions, which also hinders people from using biodiesel. Is there a more environmentally friendly and economical product that can help transportation enterprises, individuals and diesel generator users save fuel costs and meet environmental protection requirements?

At present, various diesel engine refitting equipment provided by Rich Industries has changed the diesel engine into a dual-fuel system, which can use both petrochemical diesel oil and vegetable oil directly, including swill oil, providing a new choice for the majority of diesel engine users. After a lot of inspections and tests after actual modification, the opacity of carbon monoxide, particulate matter (PM) and exhaust gas has been greatly improved when vegetable oil is directly used in the modified diesel engine, and only the indexes of nitrogen oxides are basically the same as those when diesel oil is used. The pungent smell of diesel burning has also turned into the smell of French fries. However, the combustion values of various vegetable oils are not much different from those of diesel oil (see the comparison of various oil indexes for details).

There is not much difference in output power and acceleration between using vegetable oil directly and using petrochemical diesel oil. The oil consumption of vegetable oil (including waste vegetable oil) is only 5.65 liters per 100 kilometers, and that of petrochemical diesel oil is 5.23 liters (the above data are Canadian vehicle data). And because vegetable oil does not contain sulfur, it can lubricate the engine. After the modified vehicle runs 10000 km, check the fuel injector, and there is no deposit, so it does not need to be replaced.

Whether you are a truck, a car, a bus, a dumper, a tractor or a generator, as long as you use a diesel engine (some models are not recommended), you can convert it into a dual-fuel system and use vegetable oil directly. After modification, you can contact local restaurants and fast food restaurants, collect swill oil from restaurants, filter it and use it on your modified engine (please refer to the modification manual for specific use). In addition, the modified equipment we provide can also make diesel engines directly use B 100 biodiesel that may appear in China in the near future in cold areas.