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A kind of method for preparing high cetane diesel oil by direct hydrogenation of animal and vegetable fats and oils

A technology of animal and vegetable oil and high cetane, which is applied in the field of direct hydrogenation of animal and vegetable oil to prepare high cetane number diesel, can solve the problems of low product yield, low grade, easy deactivation of catalyst and economic benefits, etc. The effect of high catalyst activity, reduction of cold filter point and density, good economic benefits and industrial application prospects

Active Publication Date: 2021-02-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a method for directly hydrogenating animal and vegetable fats and oils to prepare high-cetane number diesel oil, which solves the problems of low product yield, low grade, easy deactivation of catalysts and poor economic benefits in the direct hydrogenation of animal and vegetable fats and oils to diesel oil And other issues

Method used

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  • A kind of method for preparing high cetane diesel oil by direct hydrogenation of animal and vegetable fats and oils
  • A kind of method for preparing high cetane diesel oil by direct hydrogenation of animal and vegetable fats and oils
  • A kind of method for preparing high cetane diesel oil by direct hydrogenation of animal and vegetable fats and oils

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Effect test

Embodiment 1

[0024] Embodiment 1: With water content as 2%, the palm oil press that metal ion content is 500ppm, and total acid value is 160mgKOH / g is raw material, and water content can be reduced to below 0.2% through flashing, with humic acid substance and The mixed molding of clay is an adsorbent, and the reaction conditions are: temperature 100°C, space velocity 0.2h -1 , wherein the humic acid substances account for 30% of the total mass, and the clay mass accounts for 70% of the total mass. After passing through the adsorption bed, the metal ion concentration in the raw material is reduced to 20ppm. SiO 2 -Al 2 o 3 Supported fluorine and lanthanum modified NiMo sulfide catalysts as refined catalysts with certain isomeric functions, in which NiO accounts for 4%, MoO 3 It accounts for 22%, La accounts for 2%, F accounts for 0.5%, and the rest is carrier; the supplementary refined catalyst is an oxide-supported NiW sulfide catalyst. Based on the mass of the catalyst before presulfu...

Embodiment 2

[0027] Embodiment 2: with SiO 2 -Al 2 o 3Supported fluorine and lanthanum modified NiMo sulfide catalysts as refined catalysts with certain isomeric functions, in which NiO accounts for 4%, MoO 3 It accounts for 22%, La accounts for 2%, F accounts for 0.5%, and the rest is carrier; the supplementary refined catalyst is an oxide-supported NiW sulfide catalyst. Based on the mass of the catalyst before presulfurization, NiO accounted for 6%, WO 3 15% and the rest is Al 2 o 3 Carrier; the volume ratio of the loaded refined catalyst to the added refined catalyst is 5:1. Reaction conditions: temperature 360°C, hydrogen partial pressure 5MPa, space velocity 0.5h -1 , under the condition of hydrogen-to-oil ratio of 600, self-produced diesel oil is used as circulating oil, and the mass ratio of circulating oil to raw oil is 1:1 as feed for hydrorefining. See Table 2 below for supplemental CO 2 influence on the outcome of the reaction.

[0028]

[0029] It can be seen from t...

Embodiment 3

[0030] Embodiment 3: with SiO 2 -Al 2 o 3 Supported fluorine and lanthanum modified NiMo sulfide catalysts as refined catalysts with certain isomeric functions, in which NiO accounts for 4%, MoO 3 It accounts for 22%, La accounts for 2%, F accounts for 0.5%, and the rest is carrier; the supplementary refined catalyst is an oxide-supported NiW sulfide catalyst. Based on the mass of the catalyst before presulfurization, NiO accounted for 6%, WO 3 15% and the rest is Al 2 o 3 Carrier; the volume ratio of the loaded refined catalyst to the added refined catalyst is 5:1. Reaction conditions: temperature 360°C, hydrogen partial pressure 5MPa, space velocity 0.5h -1 , under the condition of hydrogen-to-oil ratio 600, self-produced diesel oil is used as the circulating oil, and the influence of the reaction results is shown in Table 3 below when the mass ratio of the circulating oil to the feedstock oil is different.

[0031]

[0032] It can be seen from the table that when ...

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Abstract

The invention discloses a method for directly hydrogenating animal and vegetable oils to prepare high-cetane diesel oil, which belongs to the technical fields of environmental protection and energy. The waste animal and vegetable oils are first flashed to remove water, and then impurities and metal ions are removed by adsorption. The treated animal and vegetable oils are mixed with sulfur replenishing agents, pressurized and mixed with hydrogen into the hydrofining tower, and the upper layer of the hydrofining tower The refined catalyst with a certain isomerization function is installed, and the lower layer is equipped with a supplementary refined catalyst. After hydrotreating, the product is separated into water phase, oil phase and gas phase through gas-liquid separation, and the gas phase is returned to the inlet of the hydrotreating tower after treatment to adjust the CO 2 The concentration can effectively increase the yield of liquid hydrocarbons; the oil phase is distilled into gasoline and diesel, and part of the diesel is used as circulating oil. The invention has the advantages of simple process, high catalyst activity, good stability, high cetane number of obtained diesel oil, low cold filter point, good economic benefit and industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and energy, and relates to a method for directly hydrogenating animal and vegetable oils to prepare high-cetane number diesel oil. Background technique [0002] The increasing shortage of fossil fuels and the environmental pollution caused by their combustion force people to seek renewable clean fuels. In the plan to replace fossil fuels, clean fuels produced from renewable animal and vegetable oils (such as soybean oil, jatropha oil, palm oil, acidified oil, lard, and food waste oil) are considered green and renewable. A carbon-neutral technical route. At present, biodiesel can be prepared by transesterification of low-carbon alcohols and vegetable oils at home and abroad. However, the consumption of a large amount of low-carbon alcohols in this reaction increases the production cost of biodiesel, and at the same time, a large amount of by-product glycerol is produced, which br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00C10G7/00B01D15/08
CPCB01D15/08C10G3/45C10G3/50C10G7/00C10G2300/1007C10G2400/04Y02P30/20
Inventor 梁长海李闯陈霄齐骥
Owner DALIAN UNIV OF TECH
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