A method for preparing long-chain alkane fuels by catalyzing the hydrodeoxygenation of fatty acids or fatty acid esters

A fatty acid ester and hydrodeoxygenation technology, which is used in the preparation of liquid hydrocarbon mixtures, biological raw materials, petroleum industry, etc., can solve the problems of difficult separation of reaction products and systems, chain scission loss of alkane products, and low catalytic efficiency, etc. To achieve the effect of easy separation, reduced energy consumption, and easy implementation

Inactive Publication Date: 2017-11-21
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned reactions of fatty acids and fatty acid esters to prepare alkanes by hydrodeoxygenation all use organic solvents as the reaction medium, and the reaction temperature is high, which easily leads to chain scission loss of alkanes products, and the catalytic efficiency is not high, and the reaction products are difficult to separate from the system.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing long-chain alkane fuels by catalyzing the hydrodeoxygenation of fatty acids or fatty acid esters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Preparation of long-chain alkane fuel by ruthenium-catalyzed hydrogenation-deoxygenation of methyl stearate.

[0022] In 80mL stainless steel autoclave, add methyl stearate (200mg, 0.67mmol), catalyst Ru / HZSM-5 (150mg, Ru 1.0wt.%, Si / Al=25), H 2 O (10mL) with H 2 H 2 After the pressure was raised to 3.0 MPa to ensure that the autoclave was airtight, it was placed in a heating mantle at 200° C. and stirred for 8 hours. During the reaction, the maximum pressure in the kettle can reach about 6MPa; after the reaction is completed, the pressure in the kettle will drop to about 3MPa after cooling to room temperature.

[0023] The reaction solution was extracted with cyclohexane, and the extracted organic phase was analyzed and quantified by gas-mass mass. The analysis results showed that the conversion rate of methyl stearate was 91%, the yield rate of heptadecane was 64%, the yield rate of octadecane was 13%, and the yield rate of stearic acid was 0%.

Embodiment 2

[0030] Example 2: Platinum-catalyzed hydrogenation-deoxygenation of methyl stearate to prepare long-chain alkane fuels.

[0031] In 80mL stainless steel autoclave, add methyl stearate (200mg, 0.67mmol), catalyst Pt / HZSM-5 (150mg, Pt 1.0wt.%, Si / Al=25), H 2 O (10mL) with H 2 H 2 After the pressure was raised to 3.0 MPa to ensure that the autoclave was airtight, it was placed in a heating mantle at 200° C. and stirred for 8 hours. During the reaction, the maximum pressure in the kettle can reach about 6MPa; after the reaction is completed, the pressure in the kettle will drop to about 3MPa after cooling to room temperature.

[0032] The reaction solution was extracted with cyclohexane, and the extracted organic phase was analyzed and quantified by gas-mass mass. The analysis results showed that the conversion rate of methyl stearate was 81%, the yield rate of heptadecane was 0%, the yield rate of octadecane was 1%, and the yield rate of stearic acid was 69%.

Embodiment 3

[0033] Example 3: Preparation of long-chain alkane fuel by ruthenium-catalyzed hydrogenation-deoxygenation of methyl stearate.

[0034] In 80mL stainless steel autoclave, add methyl stearate (200mg, 0.67mmol), catalyst Ru / HZSM-5 (150mg, Ru 1.0wt.%, Si / Al=25), H 2 O (10mL) with H 2 H 2 After the pressure was raised to 3.0 MPa to ensure that the autoclave was airtight, it was placed in a heating mantle at 180° C. and stirred for 8 hours. During the reaction, the pressure inside the kettle can reach up to about 5.5MPa; after the reaction is finished, cool to room temperature, and the pressure inside the kettle drops to about 3MPa.

[0035] The reaction solution was extracted with cyclohexane, and the extracted organic phase was analyzed and quantified by gas-mass mass. The analysis results showed that the conversion rate of methyl stearate was 24%, the yield rate of heptadecane was 17%, the yield rate of octadecane was 2%, and the yield rate of stearic acid was 0%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing long-chain alkane fuels by catalyzing the hydrodeoxygenation of fatty acids or fatty acid esters. In the presence of hydrogen, in a water phase or an organic phase, in a closed autoclave, the silicon-alumina fuel with an acid center is used Molecular sieve HZSM‑5 with a ratio of 25 is used as a carrier to support metal nanoparticles. The acid-metal bifunctional catalyst is used as a catalyst to catalyze the hydrodeoxygenation of fatty acids or fatty acid esters to prepare long-chain alkane fuels. When the reaction medium is water, it is economical and environmentally friendly. High efficiency, mild reaction conditions, easy to realize, save resources, and help reduce energy consumption. After the reaction, the product is immiscible with water and easy to separate, and the catalyst can be recycled and recycled. By controlling the reaction medium and reaction temperature and other conditions, it can be realized Control of the yield ratio of the products heptadecane and octadecane.

Description

Technical field: [0001] The invention relates to a method for preparing long-chain alkane fuel by catalyzing the hydrodeoxygenation of fatty acid or fatty acid ester. Background technique: [0002] As a renewable and clean biomass energy, biodiesel is very close to petrochemical diesel in physical properties and is the best substitute for petrochemical diesel. Among them, the first-generation biodiesel refers to fatty acid monoalkyl esters obtained by transesterification of animal and vegetable oils (fatty acid triglycerides) and alcohols (methanol or ethanol), the most typical being fatty acid methyl esters. However, due to the disadvantages of high oxygen content, relatively low calorific value, and a large amount of waste water containing acid, alkali and grease during production, the application is greatly restricted. The second-generation biodiesel is obtained by hydrodeoxygenation, isomerization and other processes of the first-generation biodiesel to obtain alkane si...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 许齐勇郭园园陈金铸
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap