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A method for catalytically cracking vegetable asphalt to prepare bio-jet fuel

A plant asphalt and catalytic cracking technology, which is applied in the preparation of liquid hydrocarbon mixture, the treatment of multi-stage series refining and cracking process, waste fuel, etc. It can solve the problems of complex waste oil components, influence of catalyst activity, and catalyst coking. , to achieve the effect of low equipment requirements, reduced raw material costs, and strong adaptability

Active Publication Date: 2021-07-13
YANCHENG INST OF IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above scheme can basically realize the preparation of aviation fuel, the problems encountered are concentrated in that due to the complexity of waste oil components and the relatively high content of colloid components, it is easy to cause coking of the catalyst and difficulty in engineering. In addition, the water formed by hydrodeoxygenation It is easy to affect the catalyst activity, so it is urgent to find a new solution
On the other hand, although general animal and vegetable oils can be used to prepare bio-jet fuel, the high price of bio-jet fuel forces people to seek cheaper raw materials for the preparation of bio-jet fuel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A certain amount of magnesium nitrate, nickel nitrate, cerium nitrate (Mg / Ni / Ce molar ratio 3:2:0.5) and urea (2 times the amount of nitrate substance) were dissolved in deionized water, and added dropwise to In a stainless steel bottle, after the dissolution is complete, hydrothermally react at 120°C for 24 hours, let it stand and cool to room temperature, vacuum filter, wash the filter cake with deionized water until neutral to obtain a solid product, and mix the solid product and nano-ferric oxide by pressing After mixing evenly with a mass ratio of 100:5, a magnetically modified hydrotalcite catalyst was obtained after calcining at 400°C, which was recorded as magnetic Fe-Ce-LDO.

[0029] Mix plant asphalt and 1% magnetic catalyst evenly, then add it to the cracking reactor, set the furnace temperature to 450°C, and the nitrogen flow rate to 80mL / min, collect the cooled liquid after cracking, and heat up the obtained liquid to rectify. Collect products with fraction...

Embodiment 2

[0032] Dissolve a certain amount of magnesium nitrate, nickel nitrate and cerium nitrate (Mg / Ni / Ce molar ratio is 3:2:0.75) and urea (3 times the amount of nitrate substance) in water, and add it dropwise to the stainless steel bottle , hydrothermally reacting at 150°C for 15h, standing to cool to room temperature, vacuum filtering, washing the filter cake with deionized water until neutral to obtain a solid product, and combining the solid product and nano-ferric oxide at a mass ratio of 100:7 After mixing evenly, a magnetically modified hydrotalcite catalyst was obtained after calcining at 300°C, which was recorded as magnetic Mg / Ni / Ce-LDO.

[0033] Mix plant asphalt and a certain amount of magnetic Mg / Ni / Ce-LDO evenly, the amount of magnetic Mg / Ni / Ce-LDO is 5%, and then pump it into the tubular cracking furnace, the furnace temperature is set at 500 °C, and the nitrogen flow rate The pyrolysis time is 80mL / min, and the pyrolysis time is 10 minutes. The product obtained from...

Embodiment 3

[0036] A certain amount of magnesium nitrate, nickel nitrate, cerium nitrate (Mg / Ni / Ce molar ratio 3:2:1) and urea (4 times the amount of nitrate substance) were dissolved in deionized water, and added dropwise to In a stainless steel bottle, after the dissolution is complete, hydrothermally react at 180°C for 18 hours, let stand and cool to room temperature, vacuum filter, wash the filter cake with deionized water until neutral to obtain a solid product, and combine the solid product and nano-ferric oxide by pressing After mixing evenly with a mass ratio of 100:10, a magnetically modified hydrotalcite catalyst was obtained after calcining at 350°C, which was recorded as magnetic Mg / Ni / Ce-LDO.

[0037] Mix plant asphalt and a certain amount of magnetic Mg / Ni / Ce-LDO evenly, the amount of magnetic Mg / Ni / Ce-LDO is 8%, and then pump it into the tubular cracking furnace, the furnace temperature is set at 600 °C, and the nitrogen flow rate The pyrolysis time is 80mL / min, and the pyr...

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Abstract

The invention discloses a method for preparing bio-jet fuel by catalytically cracking plant asphalt. Using modified hydrotalcite as a catalyst and plant asphalt as a raw material, the reaction is carried out in a cracking reactor in a nitrogen atmosphere, and the obtained liquid is distilled and separated, and the fraction at 150-300 ° C is taken, and the liquid product obtained is bio-jet fuel. The method of the invention has simple process and convenient operation, and is helpful for realizing resource utilization of plant asphalt.

Description

technical field [0001] The invention belongs to the field of preparation of biological jet fuel, and in particular relates to a method for catalytically cracking biological jet fuel. Background technique [0002] With the rapid development of the world's aviation industry, traditional fossil aviation kerosene has become the largest source of emissions in the aviation industry. Because its ability and harm to produce greenhouse effects after combustion are far greater than other industries, the aviation industry is facing severe challenges in reducing carbon dioxide emissions. At present, the European Union has imposed a carbon emission tax on the aviation industry. Therefore, the fuel of the aviation industry is becoming more environmentally friendly, and the development trend of green and renewable energy is getting stronger and stronger. Bio-jet fuel is a renewable green energy, generally using renewable substances as raw materials, and the products are C9-C16 linear satur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G2/00C10G55/06
CPCC10G2/00C10G55/06C10G2300/1011Y02E50/30Y02T50/678
Inventor 朱驯
Owner YANCHENG INST OF IND TECH