Method for preparing hydrogenated biodiesel by catalyzing directional hydrodeoxygenation of grease

A biodiesel, hydrodeoxygenation technology, applied in fatty acid hydrogenation, chemical instruments and methods, biofuels, etc., to reduce the reaction temperature and time, avoid the defect of easy inactivation in contact with water, and reduce the generation of reaction moisture.

Pending Publication Date: 2020-03-06
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem that exists now is how to improve the directional selectivity of catalytic hydrodecarboxylation and hydrodecarbonylation of fats and oils, so as to clarify the main path of catalytic hydrogenation reaction, increase the total content of pentadecane and heptadecane in the product, and reduce the by-products of other alkanes. product content, to obtain high-quality hydrogenated biodiesel with concentrated component content

Method used

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  • Method for preparing hydrogenated biodiesel by catalyzing directional hydrodeoxygenation of grease
  • Method for preparing hydrogenated biodiesel by catalyzing directional hydrodeoxygenation of grease
  • Method for preparing hydrogenated biodiesel by catalyzing directional hydrodeoxygenation of grease

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Experimental program
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Effect test

Embodiment 1

[0030] Catalyst Ni 2 The preparation method of P / SAPO-11:

[0031] The content of control nickel element is 15wt.% of carrier quality, and the nickel nitrate hexahydrate and the diammonium hydrogen phosphate metered by the mol ratio of nickel and phosphorus are 1: 1 are dissolved in deionized water, and evenly transferred in the crucible to be dissolved, Add SAPO-11, ultrasonically impregnate for 30min, transfer the impregnating solution into an oven at 80°C and dry for 12h, and finally move it to a muffle furnace at 550°C for calcination for 4h, crush it through an 80-mesh sieve, and obtain a catalyst precursor; add the catalyst precursor to In a tube furnace, hydrogen is introduced to carry out temperature-programmed reduction, and H 2 The flow rate is 150mL / min, the temperature is raised to 250°C at 10°C / min, the temperature is raised to 350°C at 5°C / min, and finally the temperature is raised to 650°C at 1°C / min, and the temperature is maintained at 650°C for 3 hours; Aft...

Embodiment 2

[0037] Catalyst Ni 2 The preparation method of P / SAPO-11:

[0038] The content of control nickel element is 10wt.% of carrier quality, and the nickel nitrate hexahydrate and the ammonium dihydrogen phosphate that will be measured as 1: 1 by the molar ratio of nickel and phosphorus are dissolved in deionized water, and evenly transfer in the crucible to be dissolved, Add SAPO-11, ultrasonically impregnate for 30min, transfer the impregnating liquid into an oven at 80°C and dry for 12h, and finally move it to a muffle furnace at 550°C for calcination for 4h, crush it through a 80-mesh sieve, and obtain a catalyst precursor; add the catalyst precursor to In the high-temperature tube furnace, hydrogen gas is introduced to carry out temperature-programmed reduction. The H2 flow rate is 150mL / min, and the temperature is raised to 250°C at 10°C / min, then to 350°C at 5°C / min, and finally to 1°C / min. 650°C, keep a constant temperature of 650°C for 3 hours; after the reduction is compl...

Embodiment 3

[0042] Catalyst Ni 2 The preparation method of P / SAPO-11:

[0043] Control the content of nickel element to be 5wt.% of carrier quality, be that nickel nitrate hexahydrate and diammonium hydrogen phosphate metered by the mol ratio of nickel and phosphorus are 1: 1 and be dissolved in deionized water, wait to be dissolved and evenly transfer in the crucible, Add SAPO-11, ultrasonically impregnate for 30min, transfer the impregnating liquid into an oven at 80°C and dry for 12h, and finally move it to a muffle furnace at 550°C for calcination for 4h, crush it through a 80-mesh sieve, and obtain a catalyst precursor; add the catalyst precursor to In the high-temperature tube furnace, hydrogen gas is introduced to carry out temperature-programmed reduction. The H2 flow rate is 150mL / min, and the temperature is raised to 250°C at 10°C / min, then to 350°C at 5°C / min, and finally to 1°C / min. 650°C, keep a constant temperature of 650°C for 3 hours; after the reduction is completed and ...

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Abstract

The invention discloses a method for preparing hydrogenated biodiesel by catalyzing directional hydrodeoxygenation of grease, and belongs to the technical field of preparation of hydrogenated biodiesel. A molecular sieve supported catalyst is adopted to catalyze a hydrodeoxygenation reaction of a grease raw material in a hydrodecarboxylation/decarbonylation mode to obtain hydrogenated biodiesel, and the total content of pentadecane and heptadecane in the hydrogenated biodiesel is greater than 85%; the active component of the catalyst is Ni2P, and the dosage of the catalyst is 5%-10% of the weight of the reaction grease raw material; the main components of the hydrogenated biodiesel are pentadecane and heptadecane, and the selectivity of directional hydrodecarboxylation/decarbonylation is greater than 80%, the generation of reaction moisture is reduced, the defect that the catalyst is easily inactivated when meeting water is avoided, and the service life of the catalyst is prolonged; the reaction conversion rate of the prepared hydrogenated biodiesel is greater than 95%, the temperature and time of the grease hydrodeoxygenation reaction are greatly reduced, and the reaction energy consumption and cost are significantly reduced.

Description

technical field [0001] The invention belongs to the technical field of hydrogenated biodiesel preparation, and in particular relates to a method for preparing hydrogenated biodiesel by catalyzing oil directional hydrodeoxygenation. Background technique [0002] With the rapid development of the world economy, the energy supply required by human society has increased sharply. The traditional fossil energy is on the verge of exhaustion and the ecological environment problems generated during the use have seriously threatened the normal survival and development of human beings. It is urgent to find alternative energy sources for petrochemical energy. . For a long time, the research and use of green, low-carbon, clean and renewable biodiesel has attracted much attention. The first generation of biodiesel is fatty acid methyl ester, which has mature technology and application. As an alternative fuel, it has many advantages, but it also has certain defects and limitations, such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/12C10L1/02
CPCB01J29/85B01J2229/18C10L1/02Y02E50/10
Inventor 刘朋蒋剑春周铭昊徐俊明王奎李静夏海虹叶俊赵佳平王瑞珍
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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