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Method for catalytic synthesis of biodiesel by using magnetic nano-rod solid alkali

A magnetic nanorod and biodiesel technology, which is applied in chemical instruments and methods, biofuels, chemical/physical processes, etc., can solve the problems of catalyst loss, catalyst separation and product pollution, etc., and achieve less loss and easy rapid separation Good effect on recovery and thermal stability

Active Publication Date: 2018-12-21
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the composite metal oxide solid base has good catalytic activity, the catalyst is difficult to separate completely during filtration or centrifugation, which will cause some pollution to the product and loss of the catalyst

Method used

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  • Method for catalytic synthesis of biodiesel by using magnetic nano-rod solid alkali
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  • Method for catalytic synthesis of biodiesel by using magnetic nano-rod solid alkali

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Experimental program
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Embodiment 1

[0025] Ce(NO 3 ) 3 .6H 2 O, Fe(NO 3 ) 3 .9H 2 Add O into the beaker according to the molar ratio of Ce and Fe at 1:1, add deionized water and stir to mix, and then weigh 1.35mol of NaOH and dissolve it in 100ml of deionized water to prepare a NaOH alkali solution with a concentration of 13.5mol / L, and wait for it to cool Finally, pour it into the salt solution under vigorous stirring at room temperature, and continue to stir for 30 minutes, then pour the mixed solution into the polytetrafluoroethylene lining, and place it in a 100°C oven for crystallization for 24 hours, cool to room temperature, and the formed The precipitate was washed to neutrality, filtered and dried in an oven at 80°C for 12 hours, and then heated to 400°C for 4 hours in a box-type muffle furnace at a heating rate of 3°C / min. After cooling, the magnetic nanorod CeO was obtained. 2 -Fe 2 o 3 Carrier with a specific surface area of ​​74.7m 2 / g, the nanorod length is 130-220nm. KF, CeO 2 -Fe 2 o ...

Embodiment 2

[0027] Embodiment 2 (comparative example) operating procedure is the same as embodiment 1, but solid alkali is 5%KF / CeO 2 -Fe 2 o 3 , namely KF and CeO 2 -Fe 2 o 3 The mass ratio of the biodiesel product was 0.05, and the mass yield of the biodiesel product was 1.54%.

Embodiment 3

[0028] Embodiment 3 (comparative example) operating procedure is the same as embodiment 1, but solid alkali is 10%KF / CeO 2 -Fe 2 o 3 ,Right now

[0029] KF and CeO 2 -Fe 2 o 3 The mass ratio of the biodiesel product is 0.1, and the mass yield of the biodiesel product is 51.2%.

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Abstract

The invention discloses a method for catalytic synthesis of biodiesel by using magnetic nano-rod solid alkali. The prepared KF / CeO2-Fe2O3 solid alkali has the characteristics of magnetic nano-rods, iseasy to quickly separate and has less loss; the preparation method has the characteristics of simplicity, good thermal stability, mild reaction conditions, high catalytic activity and the like; underthe conditions that the reaction time is 4 hours, the reaction temperature is 85 DEG C, the use amount of the catalyst is 5 percent and the ratio of the alcohol-oil ratio is 27 to 1, the mass yield of biodiesel products synthesized by using catalytic oil and alcoholic substances reaches 95.9 percent.

Description

technical field [0001] The invention belongs to the field of biomass energy catalysis and relates to a magnetic nanorod solid base KF / CeO 2 -Fe 2 o 3 Method for catalytic synthesis of biodiesel. Background technique [0002] As the global energy structure changes, the structural and strategic position of renewable energy has been established. In order to solve the shortage of fossil energy and reduce environmental pollution, people began to seek renewable alternative energy. Biodiesel has received attention as a clean and renewable alternative energy source. There are homogeneous catalysts and heterogeneous catalysts commonly used in the preparation of biodiesel by transesterification. Homogeneous acid-base has uniform catalytic strength and high catalytic efficiency, but there are problems such as complicated separation, equipment corrosion, acid-base treatment, and wastewater discharge. In order to overcome the defects of homogeneous catalysts, it is necessary to sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128C10L1/02C11C3/10
CPCC10L1/02C11C3/10B01J27/128B01J35/33Y02E50/10
Inventor 潘浪胜程志鹏刘跃进李勇飞赵晓宇向富运
Owner XIANGTAN UNIV