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Magnetic carbon-based catalyst and method for preparing biodiesel by using same

A carbon-based catalyst, magnetic carbon technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. problems such as few sites, to achieve the effect of excellent recycling ability, good catalytic activity and application value, and reducing environmental pollution

Active Publication Date: 2022-01-14
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most heterogeneous catalysts have poor structural properties, such as low specific surface area and pores, resulting in fewer active sites and longer catalytic reaction time.

Method used

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  • Magnetic carbon-based catalyst and method for preparing biodiesel by using same
  • Magnetic carbon-based catalyst and method for preparing biodiesel by using same

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Experimental program
Comparison scheme
Effect test

Embodiment 1-12

[0037] A method for preparing a magnetic carbon-based catalyst, the method comprising the steps of:

[0038] (1) Electric furnace dust pretreatment:

[0039] Grind the electric furnace dust with a ball mill and dry it at 80°C to obtain pretreated electric furnace dust;

[0040] (2) Preparation of magnetic carbon-based catalysts:

[0041] ① Take the pretreated electric furnace dust, add concentrated hydrochloric acid, and after the reaction, add deionized water and straw ash 1 times the mass of the electric furnace dust, stir for 8 hours, filter and wash until the pH of the solution is neutral, and then dry;

[0042] ②Calcinate the dried sample at 600°C for more than 2 hours to obtain the magnetic carbon carrier;

[0043] ③Take the magnetic carbon carrier obtained in step ②, mix it with sodium methoxide according to the proportion shown in Table 1, add deionized water, mix and magnetically stir at a constant temperature at the temperature shown in Table 1, dry, and then dry t...

Embodiment 13

[0051] A method for preparing a magnetic carbon-based catalyst, the method comprising the steps of:

[0052] (1) Electric furnace dust pretreatment:

[0053] Grind the electric furnace dust with a ball mill and dry it at 100°C to obtain pretreated electric furnace dust;

[0054] (2) Preparation of magnetic carbon-based catalysts:

[0055] ① Take the pretreated electric furnace dust, add concentrated hydrochloric acid, and after the reaction, add deionized water and rice husks 1.5 times the mass of the electric furnace dust, stir for 8 hours, filter and wash until the pH of the solution is neutral, and then dry;

[0056] ②Calcinate the dried sample at 700°C for more than 2 hours to obtain the magnetic carbon carrier;

[0057] 3. the magnetic carbon carrier that step 2. obtains and sodium methylate are mixed, and the add-on of described sodium methylate is 70% of the magnetic carbon carrier add-on, adds deionized water, at 80 o C, constant temperature mixing, magnetic stirrin...

Embodiment 14

[0064] A method for preparing a magnetic carbon-based catalyst, the method comprising the steps of:

[0065] (1) Electric furnace dust pretreatment:

[0066] Grind the electric furnace dust with a ball mill and dry it at 105°C to obtain pretreated electric furnace dust;

[0067] (2) Preparation of magnetic carbon-based catalysts:

[0068] ① Take the pretreated electric furnace dust, add concentrated hydrochloric acid, after the reaction, add deionized water and seed shell ash twice the mass of the electric furnace dust, stir, filter and wash until the pH of the solution is neutral, and then dry;

[0069] ②Calcinate the dried sample at 800°C for 4 hours to obtain the magnetic carbon carrier;

[0070] 3. After mixing the magnetic carbon carrier obtained in step 2. with sodium methoxide, add deionized water, at 95 o C, constant temperature mixing and magnetic stirring for more than 4 hours, drying, and then heating the dried sample to 700°C at a heating rate of 7°C / min under n...

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Abstract

The invention discloses a magnetic carbon-based catalyst which is prepared by the following steps: grinding electric furnace dust by using a ball mill, and carrying out drying at 75-105 DEG C to obtain pretreated electric furnace dust; taking the pretreated electric furnace dust, adding concentrated hydrochloric acid, adding deionized water and a carbon source after reaction, conducting stirring, filtering and washing until the pH value of the solution is neutral, and carrying out drying; calcining a dried sample at 600-800 DEG C for 2 hours or more to obtain a magnetic carbon carrier; and mixing the obtained magnetic carbon carrier and sodium methoxide, adding deionized water, conducting mixing at a constant temperature, carrying out magnetic stirring, performing drying, heating the dried sample to 600-700 DEG C at a heating rate of 5-7 DEG C / min in an inert gas, keeping the sample at the temperature for 2 hours or more, and carrying out cooling to obtain the magnetic carbon-based catalyst. The catalyst has a good catalytic effect, the yield of biodiesel is greater than 98%, and the yield of the catalyst after returning is greater than 90%. And moreover, the recycling capability of the catalyst is better, and the yield of the biodiesel can reach 80% or above after seven times of reactions.

Description

technical field [0001] The invention relates to a catalyst for biodiesel and a method for preparing biodiesel, in particular to a magnetic carbon-based catalyst and a method for preparing biodiesel using the catalyst. Background technique [0002] With the rapid development of global industrialization, the consumption of fossil resources is also increasing. Excessive development and utilization of fossil fuels not only caused energy shortages, but also caused damage to the ecological environment and air pollution, which in turn threatened human health and survival. How to develop and effectively utilize clean, environmentally friendly and green renewable energy has far-reaching economic and social benefits. Biodiesel is a renewable fuel produced by transesterification reaction of vegetable oil, animal oil, catering waste oil and low-priced alcohol under the action of acidic and basic catalysts, and has received extensive attention in recent years. Biodiesel has similar phy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78C11C3/10C10L1/02
CPCB01J23/78C11C3/10C10L1/02B01J35/33Y02E50/10
Inventor 王一同李俊国王福平高迪于晴王晓嫚姬睿康乐乐
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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