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Method for preparing alkane type biodiesel by using tung oil

A biodiesel and alkane technology, applied in biofuel, hydrocarbon oil cracking, petroleum industry, etc., can solve problems such as sulfide pollution, achieve high conversion rate, simple preparation process, and simple reaction process

Inactive Publication Date: 2014-02-05
BEIJING UNIV OF AGRI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Embodiments of the present invention provide a method for preparing alkane-type biodiesel from tung oil to solve the above-mentioned problems. In view of the problems in the prior art, in order to fully develop and apply tung oil, the present invention proposes a hydrocracking method , the method can prepare tung oil into alkane-type biodiesel, and also involves the preparation of a green catalyst to solve the above-mentioned problem of sulfide pollution

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  • Method for preparing alkane type biodiesel by using tung oil
  • Method for preparing alkane type biodiesel by using tung oil

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Embodiment 1

[0045] (1) Using silica as the carrier, the catalyst is prepared by a step-by-step impregnation method: the silica is first immersed in an 8.3% phosphomolybdic acid solution for 9 hours, dried in an oven, calcined in a muffle furnace at 190°C, and cooled to room temperature; After being immersed in a 20% nickel nitrate solution for 7 hours, it was dried in an oven, calcined in a muffle furnace at 390°C, and then cooled to obtain a catalyst.

[0046] (2) Fill the obtained catalyst in a fixed bed reactor, and pass hydrogen into the reactor to reduce and activate the catalyst. The temperature is 400℃, the time is 5h, and the hydrogen partial pressure is 4.5MPa.

[0047] (3) Tung oil is gasified by a preheater, and then enters a fixed bed reactor for hydrocracking reaction. Operating parameters: temperature is 370℃, hydrogen partial pressure is 3.5MPa, hydrogen-oil ratio is 600Nm 3 / m 3 , The airspeed is 1.5h -1 .

[0048] (4) The product after hydrocracking is cooled by a condenser and ...

Embodiment 2

[0051] (1) Using alumina as the carrier, the catalyst is prepared by a step-by-step impregnation method: the alumina is first immersed in a 7% phosphotungstic acid solution for 6 hours, dried in an oven, calcined in a muffle furnace at 170°C, and then cooled to room temperature; After being placed in an 18% nickel nitrate solution for 6 hours, it was dried in an oven, calcined in a muffle furnace at 380° C. and then cooled to obtain a catalyst.

[0052] (2) Fill the obtained catalyst in a fixed bed reactor, and pass hydrogen into the reactor to reduce and activate the catalyst. The temperature is 400°C, the time is 5h, and the hydrogen partial pressure is 4MPa.

[0053] (3) Tung oil is gasified by the preheater, and then enters the fixed bed reactor for hydrocracking reaction. Operating parameters: temperature is 340℃, hydrogen partial pressure is 3MPa, hydrogen-oil ratio is 500Nm 3 / m 3 , The airspeed is 0.8h -1 .

[0054] (4) The product after hydrocracking is cooled by a condenser...

Embodiment 3

[0057] (1) Using silica as the carrier, the catalyst is prepared by a step-by-step impregnation method: first immerse the silica in a 10% silicotungstic acid solution for 10 hours, dry in an oven, calcinate in a muffle furnace at 200°C, and cool to room temperature; After being immersed in a 23% nickel nitrate solution for 7.5 hours, it is dried in an oven, calcined in a muffle furnace at 400° C. and then cooled to obtain a catalyst.

[0058] (2) Pack the obtained catalyst in a fixed bed reactor, and pass hydrogen into the reactor to reduce and activate the catalyst. The temperature is 410°C, the time is 5h, and the hydrogen partial pressure is 4.5MPa.

[0059] (3) Tung oil is gasified by a preheater, and then enters a fixed bed reactor for hydrocracking reaction. Operating parameters: temperature is 400℃, hydrogen partial pressure is 4.0MPa, hydrogen-oil ratio is 700Nm 3 / m 3 , The airspeed is 2.5h -1 .

[0060] (4) The product after hydrocracking is cooled by a condenser and collec...

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Abstract

The invention relates to the field of renewable energy technology and environmental protection and particularly relates to a method for preparing alkane type biodiesel by using tung oil. The method comprises the following steps: utilizing a porous inorganic material as a carrier and preparing a catalyst through a stepwise impregnation method; introducing hydrogen to reduce and activate the catalyst; introducing gaseous tung oil to carry out a hydrocracking reaction with the hydrogen; and collecting the alkane type biodiesel generated after the hydrocracking reaction. The cetane number of the biodiesel prepared by the method provided by the invention is as high as 81-90 and is similar to that of a petroleum diesel component; the reaction process is environmental-friendly, thereby being suitable for industrial popularization and application; the preparation process is simple, the reaction procedures are simple and the conversion rate is higher than 85%; the highly unsaturated fatty acid of the tung oil limits the utilization of the tung oil serving as a biodiesel raw material, and a catalytic cracking method is adopted to carry out hydrogenation and cracking on the tung oil so that the tung oil is converted into high-quality biodiesel, thereby providing a foundation and reference for full use of tung oil resources.

Description

Technical field [0001] The invention relates to the field of renewable energy technology and environmental protection, and in particular to a method for preparing alkane-type biodiesel by using tung oil. Background technique [0002] Vernicia fordii, also known as tung tree and tung oil tree, is one of the four major woody oil plants in my country. It is a mid-subtropical tree species. It is widely distributed and planted in 12 provinces and cities including Hunan, Hubei, Guizhou, and Guangdong. Tung oil has fast fruiting, the seed oil content reaches 40%, and it is easy to cultivate. Therefore, it can be cultivated and used as a biomass energy tree. [0003] At present, the main process route of biodiesel is: the use of lower alcohol (methanol) and vegetable oil for transesterification to produce biodiesel (fatty acid methyl ester). On the one hand, fatty acid methyl esters have problems such as high oxygen content, poor combustion performance, and difficult storage. [1] . On th...

Claims

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Application Information

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IPC IPC(8): C10G47/12C10L1/02
CPCY02E50/13Y02E50/10
Inventor 刘灿荣龙赵晓萌杨明峰王燕李钧涛常明明黄体冉张婧
Owner BEIJING UNIV OF AGRI
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