Hydrogenation method for producing motor fuel from biological grease

Abstract

The invention relates to a hydrogenation method for producing a motor fuel from biological grease. The method comprises the following steps: 1, allowing hydrogen and raw oil which comprises one or more of biological grease to go through at least two hydrogenation reactors under hydrogenation operation conditions: allowing the raw oil and hydrogen to firstly go through a low temperature operation hydrogenation reactor and then go through a high temperature operation hydrogenation reactor, wherein the active component of a hydrogenation catalyst in a reaction state comprises one or several of W, Mo, Ni and Co; 2, separating a hydrogenation effluent into a gas phase which is circularly used and a liquid phase which enters a fractionating tower; and 3, supplying a sulfur-containing substance to reaction materials to maintain the content of hydrogen sulfide in the circulation gas. Compared with the prior art, the method of the invention can effectively improve the storage stability of the biological grease as fuel oil and also can effectively prolong the stability of a hydrogenation device.

Description

technical field [0001] The invention belongs to a production method of renewable energy, and relates to a hydrogenation method, in particular to a hydrogenation method for directly producing motor fuel by using biological oil as raw material oil. Background technique [0002] At present, the energy on a global scale mainly comes from fossil energy, among which petroleum is the most important source of motor fuel. Petroleum is a non-renewable energy source. Not only are the resources increasingly depleted, but also the quality and inferiority are intensifying. The continuous development of the world economy and increasingly stringent environmental protection regulations require the production of a large amount of light and clean fuels, which require the existing refining technology to be improved and improved. While improving, new oil substitutes are added to produce products that meet the requirements at the lowest cost. [0003] As a renewable resource, bio-oil has been wi...

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Problems solved by technology

[0005] EP1741767 and EP1741768 disclose a method for producing diesel fractions from animal and vegetable oils, mainly animal and vegetable oils first undergo hydrogenation, and then pass through an isomerization catalyst bed to obtain low-condensation diesel components, but due to the hydrogenation Water is generated during the process, which has a very adverse effect on the isomerization catalyst, and the device cannot run stably for a long period of time

[0006] In the bio-oil hydrogenation process including the above method, one of the main problems encountered is that the stability of the catalyst is poor, the operation cycle is short, and the catalyst needs to be frequently shut down to replace the catalyst

Especially when bio-oil is used as raw material alone or the mixing ratio of bio-oil is high, the operation cycle of the hydrogenation catalyst will be significantly affected, which cannot meet the requirements of industrial applications

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