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A kind of preparation method of sulfuric acid acidified mesoporous SIO2 colloidal sphere catalyst for synthesizing biodiesel

A technology for synthesizing organisms and colloidal spheres, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, and biofuels. It can solve problems such as saponification reactions, and achieve low environmental pollution, few by-products, and high catalytic efficiency. Effect

Active Publication Date: 2016-01-06
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these catalysts are highly efficient, they also have some disadvantages: they are more sensitive to water and fatty acids in the raw materials, and are prone to saponification reactions (A.K.Endalew, et al., Inorganicheterogeneouscatalystsforbiodieselproductionfromvegetableoils. BiomassBioenerg, 2011, 35, 3787-3809; W.Xie, et al., Biodiesel production from soybean oil transesterification using tinoxide-supported WO 3 catalysts, Fuel Process. Technol., 2013, 109, 150-155.)
While treating monodisperse mesoporous SiO with sulfuric acid 2 Colloidal spheres have not been reported as catalysts for biodiesel

Method used

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  • A kind of preparation method of sulfuric acid acidified mesoporous SIO2 colloidal sphere catalyst for synthesizing biodiesel
  • A kind of preparation method of sulfuric acid acidified mesoporous SIO2 colloidal sphere catalyst for synthesizing biodiesel
  • A kind of preparation method of sulfuric acid acidified mesoporous SIO2 colloidal sphere catalyst for synthesizing biodiesel

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Experimental program
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Effect test

Embodiment 1

[0030] 1# sulfuric acid acidified mesoporous SiO 2 The concrete preparation steps of colloidal ball catalyst are as follows:

[0031] (1) Preparation of cetyltrimethylammonium phosphomolybdate

[0032] Measure 100mL of absolute ethanol into a beaker, add 0.4g of cetyltrimethylammonium bromide (CTAB), stir until CTAB is completely dissolved, measure 50mL of absolute ethanol into another beaker, add 0.75g For phosphomolybdic acid, stir with a glass rod until the phosphomolybdic acid is completely dissolved. Under stirring, use a dropper to drop the phosphomolybdic acid solution into the CTAB solution. After the addition is completed, continue stirring for 0.5h to make it fully react , after filtering and drying, the product quaternary ammonium phosphomolybdate was obtained, denoted as M-6;

[0033] (2) Mesoporous SiO 2 Preparation method of colloidal balls:

[0034] Weigh 80mg of M-6, put it into a round bottom flask, add 15mL of absolute ethanol, disperse in ultrasonic wave...

Embodiment 2

[0038] 2# sulfuric acid acidified mesoporous SiO 2 The concrete preparation steps of colloidal ball catalyst are as follows:

[0039] (1) The preparation method of M-6:

[0040] With the preparation method of M-6 among the embodiment 1.

[0041] (2) Mesoporous SiO 2 Preparation method of colloidal balls:

[0042] Weigh 70mg of M-6, put it into a round bottom flask, add 15mL of absolute ethanol, disperse in ultrasonic wave for 30min, until the solid is completely dispersed, add 60mL of distilled water dropwise, and keep stirring at 28°C. After stirring for 6 hours, add 0.14mL of ammonia water and 0.15mLTEOS, continue to stir at constant temperature for 16 hours, filter, dry, and then put the product into a muffle furnace for roasting at a heating rate of 1°C / min, at a constant temperature of 450°C for 4.5h to obtain mesoporous SiO 2 colloidal balls.

[0043] (3) Acidified mesoporous SiO 2 Preparation of colloidal spheres

[0044] With the preparation method of step (3) i...

Embodiment 3

[0046] 3# sulfuric acid acidified mesoporous SiO 2 The concrete preparation steps of colloidal ball catalyst are as follows:

[0047] (1) The preparation method of M-6:

[0048] With the preparation method of M-6 among the embodiment 1.

[0049] (2) Mesoporous SiO 2 Preparation method of colloidal balls:

[0050] Weigh 180mg of M-6, put it into a round bottom flask, add 15mL of absolute ethanol, disperse in ultrasonic wave for 30min, until the solid is completely dispersed, add 60mL of distilled water dropwise, and keep stirring at 28°C. After stirring for 6 hours, add 0.14mL of ammonia water and 0.15mLTEOS, continue to stir at constant temperature for 16 hours, filter, dry, and then put the product into a muffle furnace for roasting at a heating rate of 1°C / min, at a constant temperature of 450°C for 4.5h to obtain mesoporous SiO 2 colloidal balls.

[0051] (3) Acidified mesoporous SiO 2 Preparation of colloidal spheres

[0052] With the preparation method of step (3) ...

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Abstract

The invention discloses a preparation method of an acidized mesoporous SiO2 colloidal sphere catalyst and belongs to the field of chemical catalyst preparation. The preparation method of the catalyst comprises the following steps of: allowing CTAB (Cetyltrimethyl Ammonium Bromide) to react with phosphomolybdic acid in an absolute ethanol solvent at room temperature, mixing CTAB and phosphomolybdic acid to generate a precipitate immediately, filtering and drying to obtain a surfactant M-6, dispersing M-6 into an ethanol / water mixed system in a certain proportion, adding TEOS (Tetraethyl Orthosilicate), hydrolyzing TEOS under alkaline conditions, filtering, drying and roasting to obtain a mesoporous SiO2 colloidal sphere, and finally, carrying out acid treatment to obtain the acidized mesoporous SiO2 colloidal sphere catalyst. The colloidal sphere catalyst can be used for an esterification reaction for synthesizing biodiesel, and shows good catalytic activity and stability; for a reaction of oleic acid and methanol, when the dosage of the catalyst is 5%, an esterification rate of oleic acid reaches 98.5%; and after continuous circulation for 4 times, conversion rates of oleic acid are about 97%.

Description

technical field [0001] The invention belongs to the field of chemical catalyst preparation, in particular to a sulfuric acid acidified mesoporous SiO 2 The preparation technology of colloidal spheres, especially a kind of sulfuric acid acidified mesoporous SiO with good dispersion and controllable shape and particle size 2 The preparation technology of colloidal balls, the colloidal balls are used as catalysts to catalyze the esterification reaction of long-chain fatty acids to achieve good catalytic effect. Background technique [0002] Biodiesel is a form of biomass energy, which is fatty acid methyl ester prepared by transesterification of glyceride or esterification of fatty acid (A.P.Vyas, et al.Areview on FAME production processes, Fuel, 2010,89,1-9; L . Wang, et al., Ordered mesoporous carbon supported ferric sulfate: Anovel catalyst for the esterification of free fatty acids in waste cooking oil, Fuel Process Technol, 2014, 128, 10-16.). Although the physical and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/053C11C3/04C10L1/02
CPCY02E50/10
Inventor 陈国昌裘小宁蒋伟峰吴胜华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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