Method for hydrodeoxygenation of biological oil

Abstract

The invention discloses a method for hydrodeoxygenation of biological oil. The method comprises the following steps: (1) the biological oil enters a thermal high-pressure separator to be in contact with a catalyst 1 filled in the thermal high-pressure separator to perform olefin saturation and shallow hydrodeoxygenation reaction; (2) a gas-phase effluent at the top of the thermal high-pressure separator can be recycled as supplementary hydrogen, a liquid-phase effluent enters a fractionating tower, and gasoline, diesel oil and unconverted oil are obtained through separation; and (3) the unconverted oil enters a hydrofining reactor to be subjected to a deep hydrodeoxygenation reaction under the action of a catalyst 2, and an effluent enters the thermal high-pressure separator. The method can ensure the activity stability of the catalyst and the long-period stable operation of the device while producing the low-condensation-point diesel oil blending component, and has the advantages of low production cost and simple operation.

Description

technical field [0001] The invention relates to a method for hydrogenation and deoxygenation of bio-oil, in particular to a method for producing high-quality diesel blending components through hydrogenation and deoxygenation by using animal and vegetable oils as raw materials. Background technique [0002] Petroleum is a one-time resource and cannot be used renewablely. With the increase of its consumption, its production and reserves are greatly reduced. To develop new renewable energy to replace the increasingly depleted traditional energy, environmental regulations and industrial development require new clean fuels. Therefore, countries all over the world are actively exploring and developing alternative energy and renewable energy. Animal and vegetable oils are inexhaustible and are typical renewable energy sources. The composition of these biological oils is similar, mainly composed of straight-chain fatty acid triglycerides, and C 16 and C 18 mostly. Animal and vege...

AI Technical Summary

Problems solved by technology

[0012] Although the above method can effectively guarantee the activity of the catalyst and prolong the operation period of the device, at least two or more reactors and separators are required, and the investment cost of the device is high and the operation is complicated.

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