Dimethyl ether composite diesel oil and preparation process thereof

Abstract

The invention discloses a dimethyl ether composite diesel oil and a preparation process thereof, belonging to the technical field of fuel preparation. The dimethyl ether composite diesel oil is prepared by mixing, by weight, 19 to 39% of dimethyl ether, 60 to 80% of fatty acid methyl ester biodiesel and 0.5 to 1.5% of a cosolvent under stirring. The invention has the following beneficial effects: the preparation process is simple and has low production cost; the produced dimethyl ether composite diesel oil has high quality and reduces dependence on petroleum diesel; and the dimethyl ether composite diesel oil can individually replace diesel oil for application to a diesel oil engine and can be mixed with petroleum diesel at any ratio for usage.

Description

technical field [0001] The invention relates to the technical field of fuel preparation, more specifically, the invention relates to a dimethyl ether compound diesel oil and a preparation process thereof. Background technique [0002] With the depletion of petroleum resources, the increasing demand for energy and the improvement of people's awareness of environmental protection, countries around the world have accelerated the pace of developing alternative fuels, and people urgently need to find a clean, environmentally friendly and renewable energy. The cleanliness and renewability of biodiesel (fatty acid methyl ester) complies with this requirement, so its development and application have received widespread attention at home and abroad. [0003] The technical definition of biodiesel refers to fatty acid monoalkyl esters obtained by transesterification of animal and vegetable oils and alcohols (such as methanol or ethanol), the most typical being fatty acid methyl ester...

AI Technical Summary

Problems solved by technology

[0005] Has a lower calorific value than petrodiesel, causing the same diesel engines to burn biodiesel inefficiently

[0006] ②The low-temperature starting performance is not good, and the flammability performance is not good enough; it will solidify in a colder environment, resulting in filter blockage

[0007] ③ Contains trace amounts of methanol and glycerin, which will gradually degrade the contacted rubber parts such as rubber membranes, sealing rings, fuel pipes, etc.; due to its corrosiveness, it will damage the performance of engine lubricating oil, etc.

[0010] ⑥The properties of biodiesel are different due to the rich source of raw materials and scattered types. If the content of saturated fatty acids in raw materials is high, its low-temperature fluidity will be poor. If the content of polyunsaturated fatty acids is high, the oxidation stability of biodiesel will be poor.

At present, B2-B20 diesel is basically used, that is, 2%-20% biodiesel is added to petrochemical diesel to solve the low temperature fluidity of biodiesel itself, so the application of biodiesel is limited