Laboratory method for preparing hydrocarbons by deoxidizing stearic acid

A technology of hydrocarbons and stearic acid, applied in the field of biofuel production and preparation, can solve the problems of unsuitable use of vegetable oil, high condensation point, and difficult storage, etc., to reduce greenhouse gas emissions, strong low-temperature fluidity, and stability Good results

Inactive Publication Date: 2013-01-02
YUNNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, biodiesel is low-carbon alcohol esters of fatty acids, especially methyl esters. The disadvantages in use are: high condensation point, easy to deteriorate and difficult to store, etc.
In addition, the "one-pot reaction process" of vegetable oil is not suitable for hydrogenation pretreatment of rancid oil containing peroxides

Method used

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  • Laboratory method for preparing hydrocarbons by deoxidizing stearic acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh an appropriate amount of 5 wt.% Pd / C catalyst and add it to the reaction kettle, seal the reaction kettle, exhaust the air in the kettle with argon, and fill the hydrogen with a volume fraction of 25% to a pressure of 0.50-0.80MPa , the temperature was raised to 200°C at a rate of 5°C / min and kept for 30 minutes, and then allowed to stand at room temperature for later use.

[0022] (2) Add 2.0g of pretreated Pd / C catalyst, 90.0g of stearic acid and 80.0g of dodecane into the reaction kettle, seal the reaction kettle, exhaust the air in the kettle with argon, and fill it with 25% hydrogen The raw material gas mixed with 75% argon is stirred and heated to a temperature of 300±5°C under the conditions of a pressure of 2.0MPa and a rotation speed of 200rpm. After a reaction of 6 hours, it is cooled to room temperature. The reaction product in the kettle is taken out, and the Pd / C catalyst is separated by filtration. Drying yields a petroleum-like based hydrocarbon...

Embodiment 2

[0026] (1) Weigh an appropriate amount of 5wt.% Pd / C catalyst and add it to the reaction kettle, seal the reaction kettle, exhaust the air in the kettle with argon, and fill the hydrogen with a volume fraction of 25% to a pressure of 0.50-0.80MPa, Raise the temperature to 200°C at a rate of 5°C / min and keep it for 30 minutes, then let it stand at room temperature for later use.

[0027] (2) Add 3.0g of pretreated Pd / C catalyst, 90.0g of stearic acid and 80.0g of dodecane into the reaction kettle, seal the reaction kettle, exhaust the air in the kettle with argon, and fill it with 25% hydrogen The raw material gas mixed with 75% argon is stirred and heated to a temperature of 300±5°C under the conditions of a pressure of 2.0MPa and a rotation speed of 200rpm. After a reaction of 6 hours, it is cooled to room temperature. The reaction product in the kettle is taken out, and the Pd / C catalyst is separated by filtration. Drying yields a petroleum-like based hydrocarbon liquid. Ac...

Embodiment 3

[0031] (1) Weigh an appropriate amount of 5wt.% Pd / C catalyst and add it to the reaction kettle, seal the reaction kettle, exhaust the air in the kettle with argon, and fill the hydrogen with a volume fraction of 25% to a pressure of 0.50-0.80MPa, Raise the temperature to 200°C at a rate of 5°C / min and keep it for 30 minutes, then let it stand at room temperature for later use.

[0032](2) Add 3.5g of pretreated Pd / C catalyst, 90.0g of stearic acid and 80.0g of dodecane into the reaction kettle, seal the reaction kettle, exhaust the air in the kettle with argon, and fill it with 25% hydrogen The raw material gas mixed with 75% argon is stirred and heated to a temperature of 300±5°C under the conditions of a pressure of 2.0Mpa and a rotation speed of 200rpm. After a reaction of 6 hours, it is cooled to room temperature. The reaction product in the kettle is taken out, and the Pd / C catalyst is separated by filtration. Drying yields a petroleum-like based hydrocarbon liquid. Acc...

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Abstract

The invention relates to a laboratory method for preparing hydrocarbons by deoxidizing stearic acid, belonging to production and preparation of biofuels. The method comprises the following steps: weighing 5 wt.% of Pd / C catalyst, adding the catalyst into a reaction kettle, charging hydrogen gas of which the volume percent is 25%, gradually heating to 200 DEG C, and keeping the temperature for 30 minutes to carry out catalyst pretreatment; and adding the pretreaed Pd / C catalyst, stearic acid and dodecane into the reaction kettle, charging hydrogen gas and argon gas, heating while stirring, and filtering to separate out the Pd / C catalyst, thereby obtaining the catalytic deoxidization reaction products, such as hydrocarbons and the like, wherein the Pd / C catalyst-stearic acid-dodecane mass ratio is (2-5):90:80. The Pd / C catalyst has the advantages of high catalyst activity and stable performance, and can be recycled; and the prepared petroleum-base hydrocarbon liquid fuel has the advantages of high heat value, high stability and high low-temperature fluidity, and thus, has instruction meaning and development value.

Description

technical field [0001] The invention belongs to the production and preparation of biofuel. technical background [0002] Traditional fuels are refined from fossil raw material petroleum, which is a non-renewable resource. With the extraction of oil, its quality is deteriorating day by day, and its price keeps rising, while the demand for oil products is increasing year by year. At the same time, the burning of petroleum fuels is increasingly polluting the global environment. Energy security and climate deterioration are difficult problems facing the world today, and how to achieve sustainable development is the focus of common concern of all countries in the world. With the gradual depletion of petroleum fuels, it is imperative to find new renewable fuels to replace traditional fuels to maintain human survival and sustainable social development. Compared with petroleum fuels, biofuels are more abundant and renewable, and are considered to be one of the best options to rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/12C10L1/04
Inventor 张无敌张成孙培培陈玉宝尹芳许玲柳静赵兴玲刘士清
Owner YUNNAN NORMAL UNIV
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