A method of using waste animal and vegetable oil to produce aviation biofuel

Abstract

The invention discloses a method for producing aviation biofuel by using waste animal and plant oil. Raw oil is treated by a pretreatment unit, a hydrotreating unit, a degassing dehydration unit, a hydrogenation conversion unit and a rectification unit to obtain a high-quality aviation kerosene product. Under the condition of completely taking the waste animal and plant oil as the raw material, the biological aviation kerosene product conforming to ASTM D7566-11 standards is successfully produced, at the same time, the problem of catalyst poisoning caused by animal and plant oil hydrogenation for producing water, metal deposition and carbon deposition and the like is effectively solved, and large-scale and long-term operation of the device is realized.

Description

technical field [0001] The invention relates to the field of waste oil reuse, and furthermore, relates to a method for producing aviation biofuel by using waste animal and vegetable oil. Background technique [0002] With the rapid development of the world's aviation industry, traditional fossil aviation fuel (aviation kerosene) has become the largest emission source of the aviation industry, and its CO 2 Emissions account for 90% of the total emissions of the aviation industry. Although the greenhouse gas emissions of the aviation industry only account for 2% to 3% of all human greenhouse gas emissions, the ability and harm of the greenhouse effect caused by aviation kerosene combustion is far greater than other industries. , the aviation industry is facing severe CO 2 Emissions reduction challenge. Aviation biofuels prepared from renewable biomass such as animal and vegetable oils or agricultural and forestry wastes have significantly lower greenhouse gas emissions than ...

AI Technical Summary

Problems solved by technology

The disadvantage is that the refining steps in this method are relatively complicated, and there is a problem of isomerization catalyst poisoning caused by hydrodeoxygenation to generate water

On the one hand, it is difficult for the device to operate on a large scale and for a long period of time. The reasons are, for example: the metal and colloidal substances contained in animal and vegetable raw oils are likely to cause coking or scaling of the catalyst bed; the oxygen content in animal and vegetable oils is high. Water is generated during the hydrogenation process, which has a serious impact on the activity of the catalyst; the carbon monoxide produced during the hydrodecarboxylation and hydrodecarbonylation processes of animal and vegetable oils reacts with the cobalt and nickel active components of the hydrogenation catalyst, causing catalyst poisoning and deactivation

On the other hand, the quality requirements of raw materials are high and the quality of products is low. Most production methods need to blend animal and vegetable oils and petroleum components, or require more complicated pretreatment of raw materials, and the obtained products are often not Fully meet the quality requirements of "HEFA-SPK derived from hydrogenated ester and fatty acid hydrogenation synthetic paraffinic kerosene components"

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