A hydrogenation combined method for producing high-quality low-condensation-point diesel oil from bio-oil

Abstract

The invention relates to a hydrogenation combination method for producing high-quality low-condensation-point diesel oil. The hydrogenation combination method comprises the steps that firstly, under the condition of hydrogenation, biolipid and recycle hydrogen are mixed and pass through a hydrotreating reaction zone, the raw diesel oil and the recycle hydrogen are mixed and pass through a hydrofining reaction zone, the liquid obtained by separating a hydrotreating generated material flow and the liquid obtained by separating a hydrofining product are mixed and then enter a hydro-upgrading reaction zone at least comprising hydrogenation catalysts with isomerization performance, and the liquid obtained by separating a hydro-upgrading generated material flow is continuously fractionated, thus obtaining naphtha and high-quality low-condensation-point diesel oil products, wherein in the reaction state, the hydrogenation active components of the hydrogenation catalysts used in the hydrotreating reaction zone are one or more of W, Mo, Ni and Co in the sulfuration state. Compared with the prior art, the method has the advantages that not only can the storage stability of the biolipid as fuel oil be effectively improved but also the high-quality low-condensation-point clean diesel oil can be directly produced.

Description

technical field [0001] The invention belongs to a processing method of renewable energy, and relates to a hydrogenation method, in particular to a combined hydrogenation method for directly producing high-quality low-condensation-point diesel oil by using bio-grease and diesel fractions as raw material oil. Background technique [0002] At present, the global energy mainly comes from fossil energy, including coal and petroleum, and petroleum is the most important source of motor fuel. Petroleum is a non-renewable energy source, not only is the resource increasingly depleted, but also the degree of heaviness and inferiority is intensifying. With the continuous development of the world's economy and increasingly stringent environmental protection regulations, the demand for light and clean fuels in various countries is very strong, all of which require the improvement and improvement of the existing refining technology while adding new oil substitutes, and at the lowest cost ...

AI Technical Summary

Problems solved by technology

At the same time, when producing low-condensing-point diesel fractions, there are also disadvantages such as short operating periods due to the impact of catalyst activity.

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