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Composite metal nitrogen-doped carbon nanotube catalyst, preparation method thereof and method for catalyzing biodiesel by utilizing catalyst

A composite metal and carbon nanotube technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of reducing production costs, high prices, disadvantages, etc., to reduce production costs, reduce The generation of waste water and the effect of shortening the flow of the reaction process

Inactive Publication Date: 2012-09-19
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the reaction, the ionic liquid and the esterification product formed two phases, and under the same reaction conditions, [BM IM]BF 4 It can be reused 3 times and still has high catalytic activity, but the price of ionic liquid as a catalyst is still high, which is not conducive to reducing production costs

Method used

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  • Composite metal nitrogen-doped carbon nanotube catalyst, preparation method thereof and method for catalyzing biodiesel by utilizing catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Na-CN X preparation of

[0026] First put the Fe / SBA-15 catalyst into a ceramic boat, heat the quartz tube furnace to 800K, and then pass the Ar / organic amine mixed gas at a certain flow rate. Fe / SBA-15 catalyst to obtain pure CNx nanotubes, and then immerse them in an aqueous solution of sodium carbonate with a mass fraction of 50%, stir evenly, immerse for 24 hours, centrifuge, and dry in a constant temperature drying oven at 90°C for 24 hours , ground evenly, and then placed in a muffle furnace at 500°C for calcination for 5 hours to obtain Na-CN X nanotube catalyst.

[0027] (2) In the Na-CN X Preparation of biodiesel under the catalysis of nanotube catalyst

[0028] In a 250mL four-necked bottle equipped with a stirrer, a reflux condenser, a thermometer and a feeding device, add 0.5 kg of soybean oil, add 60% methanol of soybean oil quality into the reaction flask under vigorous stirring, and add 60% of soybean oil quality methanol 2% co-solvent n-hexane a...

Embodiment 2

[0030] (1) K-CN X preparation of

[0031]First put the Fe / SBA-15 catalyst into a porcelain boat, heat the quartz tube furnace to 1000K, and then pass the Ar / organic amine mixed gas at a certain flow rate. Fe / SBA-15 catalyst, to obtain pure CNx nanotubes, immerse CNx nanotubes in an aqueous solution of potassium carbonate with a mass fraction of 50%, stir evenly, immerse for 24 hours, centrifuge and dry in a constant temperature drying oven at 90°C for 24 Hours, ground evenly, and then placed in a muffle furnace at 500°C for calcination for 5 hours to obtain the K-CN of this example X nanotube catalyst.

[0032] 2) In the K-CN X Preparation of Biodiesel Catalyzed by Nanotube Catalysts

[0033] In a 250mL four-necked bottle equipped with an agitator, a reflux condenser, a thermometer and a feeding device, add 0.5Kg soybean oil, add methanol with 80% soybean oil quality into the reaction flask under vigorous stirring, and add 4% soybean oil quality % co-solvent n-hexane and ...

Embodiment 3

[0036] (1) Mg-CN X preparation of

[0037] First put the Fe / SBA-15 catalyst into a porcelain boat, heat it in a quartz tube furnace to 1100K, then pass in a mixed gas of Ar / organic amine at a certain flow rate, keep it at a constant temperature for 1.5 hours, and remove it with a dilute HF solution after natural cooling. Fe / SBA-15 catalyst, to obtain pure CNx nanotubes, immerse CNx nanotubes in an aqueous solution of magnesium nitrate with a mass fraction of 50%, stir evenly, impregnate for 24 hours, centrifuge, and dry in a constant temperature drying oven at 90 °C for 24 Hours, ground evenly, and then placed in a muffle furnace at 500°C for calcination for 5 hours to obtain Mg-CN X nanotube catalyst.

[0038] (2) In the Mg-CN X Preparation of Biodiesel Catalyzed by Nanotube Catalysts

[0039] In a 250mL four-necked bottle equipped with a stirrer, a reflux condenser, a thermometer and a feeding device, add 0.5Kg soybean oil, add methanol with 100% soybean oil quality into...

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Abstract

The invention relates to a composite metal nitrogen-doped carbon nanotube catalyst which has the chemical structural formula of M-CNX, wherein M is one of sodium ion, potassium ion, magnesium ion or calcium ion. A preparation method of the composite metal nitrogen-doped carbon nanotube catalyst comprises the following steps of: preparing a composite metal nitrogen-doped carbon nanotube by Ar / organic amine mixed gas in the presence of a Fe / SBA-15 molecular sieve catalyst; and then, immersing the composite metal nitrogen-doped carbon nanotube into different metallic compound solutions, thus obtaining the composite metal nitrogen-doped carbon nanotube catalyst. A method for preparing biodiesel by the catalyst comprises the following steps of: mixing methyl alcohol and a cosolvent, and adding the composite metal nitrogen-doped carbon nanotube catalyst into the mixture; then, reacting the obtained mixture for 20-40 minutes at the temperature of 30-120 DEG C, and standing still for layering; washing a supernatant substance to be neutral; and finally drying and filtering, thus obtaining the biodiesel.

Description

technical field [0001] The invention relates to a nitrogen-doped carbon nanotube, in particular to a composite metal-doped nitrogen-carbon nanotube catalyst, a preparation method thereof and a method for catalyzing biodiesel. Background technique [0002] Biodiesel is a fatty acid methyl ester obtained by transesterifying animal and vegetable oils or high-acid value waste oils with methanol through transesterification. It is a clean, green and renewable energy source. Vigorously developing biodiesel has important strategic significance for sustainable economic development, promoting energy substitution, reducing environmental pressure, and controlling urban air pollution. Traditional catalysts for preparing biodiesel mainly use homogeneous catalysts such as strong bases (sodium hydroxide, potassium hydroxide) and strong acids (sulfuric acid, phosphoric acid), but such catalysts are not easy to separate from the product, and the excess catalyst in the product must be Neutral...

Claims

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Application Information

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IPC IPC(8): B01J27/24C11C3/10
Inventor 李奕怀王利军田震邴乃慈
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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