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Catalyst and method for preparing biodiesel by using catalyst

A biodiesel and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, biofuels, etc., can solve the problems of high esterification reaction temperature, low surface acidity, difficult catalyst recovery, etc., and achieve excellent recycling ability. , the reduction of resource recycling and reuse, the effect of good catalytic activity and application value

Active Publication Date: 2021-01-26
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, these carbon-based solid acids often have low surface acidity, which makes the esterification reaction higher in temperature, longer in time, difficult in catalyst recovery, and higher in economic costs.

Method used

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  • Catalyst and method for preparing biodiesel by using catalyst
  • Catalyst and method for preparing biodiesel by using catalyst
  • Catalyst and method for preparing biodiesel by using catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0031] Take lead-containing blast furnace dust containing C: 32.4%, Pb: 29.4%, Zn: 1.7%, Ca: 3.0%, S: 8.0%, and use a ball mill to grind the dust. After grinding, the dust is passed through a 200-mesh sieve. Dry at 105°C for 5 hours to obtain lead-containing blast furnace dust raw materials with uniform particles after drying. The raw material of blast furnace dust containing lead with uniform particles obtained after drying is placed in a high-temperature tubular reaction furnace, calcined in nitrogen, and an appropriate gas flow setting is set, and the calcined sample is passed through a 200-mesh sieve to obtain a blast furnace dust catalyst containing lead. Wherein the parameter and effect of embodiment 1-7 are as shown in table 1.

[0032] Parameters and effects of table 1 embodiment 1-7

[0033]

[0034]

[0035] Depend on figure 1 (A) It can be seen that the particle size of the small particle metal salt of the lead-containing blast furnace dust raw material is a...

Embodiment 8

[0037] Example 1 was repeated with the following differences: component C: 35.2%, Pb: 32.1%, Zn: 2.9%, Ca: 5.0%, S: 10.0% of lead-containing blast furnace dust. The particle size of the obtained metal salt of the catalyst particles is about 300nm, the acidity of the catalyst is 0.23mmol / g, and the basicity is 0.10mmol / g.

Embodiment 9

[0039] Example 1 was repeated with the following differences: component C: 34.6%, Pb: 30.8%, Zn: 2.3%, Ca: 4.2%, S: 8.8% of lead-containing blast furnace dust. The particle size of the obtained metal salt of the catalyst particles is about 300nm, the acidity of the catalyst is 0.20mmol / g, and the basicity is 0.08mmol / g.

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Abstract

The invention discloses a lead-containing catalyst which is prepared by the following method: grinding lead-containing blast furnace dust by using a ball mill, and conducting sieving by using a 75-400-mesh sieve; drying the sieved lead-containing blast furnace dust in a drying oven at 75-105 DEG C for 5-48 hours to obtain pretreated lead-containing blast furnace dust; and putting the pretreated lead-containing blast furnace dust into a high-temperature tubular reaction furnace, conducting calcining in inert gas at 200-1000 DEG C for 1-24 hours, setting the gas flow rate to be 1-40 mL / min, andscreening the calcined sample with a 75-400-mesh sieve to obtain the required lead-containing blast furnace dust catalyst. The catalyst has acidity and alkalinity at the same time, and can be automatically separated from a liquid product through standing. The catalyst can be directly used for reaction of high-acid-value oil, the catalytic effect is very good, the biodiesel yield is greater than 95%, and the catalyst recovery rate is greater than 90%. Moreover, the recycling capability is relatively excellent, and the yield of biodiesel after five times of reaction can also reach 80% or above.

Description

technical field [0001] The invention relates to a catalyst for biodiesel and a method for preparing biodiesel, in particular to a catalyst prepared by using lead-containing blast furnace dust and a method for preparing biodiesel by using the catalyst. Background technique [0002] Currently, human society relies heavily on fossil fuels for energy. The burning of fossil fuels has led to the destruction of the ecological environment, and problems such as smog, greenhouse effect, and environmental pollution have seriously affected people's lives and health. The depletion of fossil fuels makes people realize that it is very important to develop clean, environmentally friendly and green renewable energy. 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. The physical and chemical propert...

Claims

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Application Information

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IPC IPC(8): B01J27/053C11C3/04
CPCB01J27/053C11C3/04Y02E50/10
Inventor 王一同曾亚南李俊国王亚军刘宝张喜李涛
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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