Catalyst for selective oxidation desulfurization of fuel oil, preparation method and application thereof

Abstract

The invention provides a catalyst for selective oxidation desulfurization of fuel oil as well as a preparation method and an application of the catalyst. The catalyst for selective oxidation desulfurization of fuel oil comprises the following raw materials: 80wt%-95wt% of polybenzimidazole and 5wt%-20wt% of heteropoly acid, wherein the total amount of the raw materials of the catalyst for selective oxidation desulfurization of fuel oil is 100wt%. The invention also provides a preparation method of the catalyst for selective oxidation desulfurization of fuel oil. The catalyst for selective oxidation desulfurization of fuel oil prepared by the method, has the advantages of high catalytic desulfurization efficiency when the catalyst is used for catalyzing the selective oxidation desulfurization of fuel oil and can also be recycled.

Description

technical field

[0001] The invention relates to a catalyst and its preparation method and application, in particular to a fuel oil selective oxidation desulfurization catalyst, its preparation method and application, and belongs to the field of chemical materials. Background technique

[0002] Sulfur-containing compounds in fuel oil are important pollution sources of urban air. With the continuous improvement of people's environmental protection requirements in the 21st century, countries around the world have made strict regulations on the sulfur content in fuel oil. The standard for content less than 10ppm. With the continuous upgrading of my country's emission standards and finally in line with international standards, it is imminent to improve the quality of fuel products.

[0003] Traditional hydrodesulfurization technology has very limited ability to remove high content of benzothiophene, dibenzothiophene and their derivatives in fuel oil, mainly because these sulfide...

Examples

Embodiment 1

[0036] This embodiment provides a catalyst for selective oxidation desulfurization of fuel oil and a preparation method thereof. The preparation method specifically includes the following steps:

[0037] Dissolve 0.6g of LiBr in 20mL of N,N-dimethylacetamide, weigh 4.0g of polybenzimidazole and dissolve it in the above solution, and reflux for 4h under a nitrogen atmosphere at 60°C, filter out the insoluble matter, and take solution;

[0038] Add 0.21g of phosphotungstic acid to the solution, stir at 50°C for 3h to obtain a homogeneous solution;

[0039] Transfer the homogeneous solution to an electrospinning device for electrospinning. The electrospinning conditions are: voltage 22kV, flow rate 0.4mL / h, and the distance between the needle tip and the current collector plate is 20cm to obtain nanofibers;

[0040] Wash the nanofibers with a mixed solution of acetonitrile and methanol (the volume ratio of acetonitrile and methanol is 1:1), remove N,N-dimethylacetamide solvent a...

Embodiment 2

[0043] This embodiment provides a catalyst for selective oxidation desulfurization of fuel oil and a preparation method thereof. The preparation method specifically includes the following steps:

[0044] Dissolve 0.8g of LiBr in 20mL of N,N-dimethylacetamide, weigh 4.0g of polybenzimidazole and dissolve it in the above solution, reflux at 70°C for 4h under a nitrogen atmosphere, filter out the insoluble matter, and take solution;

[0045] Add 0.44g of phosphomolybdic acid to the solution, and stir at 50°C for 3h to obtain a homogeneous solution;

[0046] Transfer the homogeneous solution to an electrospinning device for electrospinning. The electrospinning conditions are: voltage 20kV, flow rate 0.4mL / h, and the distance between the needle tip and the current collector plate is 20cm to obtain nanofibers;

[0047] Wash the nanofibers with a mixed solution of acetonitrile and methanol (the volume ratio of acetonitrile and methanol is 1:1) to remove N,N-dimethylacetamide solvent a...

Embodiment 3

[0050] This embodiment provides a catalyst for selective oxidation desulfurization of fuel oil and a preparation method thereof. The preparation method specifically includes the following steps:

[0051] Dissolve 0.7g of LiBr in 20mL of N,N-dimethylacetamide, weigh 4.0g of polybenzimidazole and dissolve in the above solution, reflux at 60°C for 4h under a nitrogen atmosphere, filter out the insoluble matter, and take solution;

[0052] Add 0.71g of silicotungstic acid to the solution, stir at 50°C for 3h to obtain a homogeneous solution;

[0053] Transfer the uniform solution to an electrospinning device for electrospinning. The electrospinning conditions are: voltage 25kV, flow rate 0.4mL / h, and the distance between the needle tip and the current collector plate is 20cm to obtain nanofibers;

[0054] Wash the nanofibers with a mixed solution of acetonitrile and methanol (the volume ratio of acetonitrile and methanol is 1:1) to remove N,N-dimethylacetamide solvent and impurit...

technical field

[0001] The invention relates to a catalyst and its preparation method and application, in particular to a fuel oil selective oxidation desulfurization catalyst, its preparation method and application, and belongs to the field of chemical materials. Background technique

[0002] Sulfur-containing compounds in fuel oil are important pollution sources of urban air. With the continuous improvement of people's environmental protection requirements in the 21st century, countries around the world have made strict regulations on the sulfur content in fuel oil. The standard for content less than 10ppm. With the continuous upgrading of my country's emission standards and finally in line with international standards, it is imminent to improve the quality of fuel products.

[0003] Traditional hydrodesulfurization technology has very limited ability to remove high content of benzothiophene, dibenzothiophene and their derivatives in fuel oil, mainly because these sulfide...

Examples

Embodiment 1

[0036] This embodiment provides a catalyst for selective oxidation desulfurization of fuel oil and a preparation method thereof. The preparation method specifically includes the following steps:

[0037] Dissolve 0.6g of LiBr in 20mL of N,N-dimethylacetamide, weigh 4.0g of polybenzimidazole and dissolve it in the above solution, and reflux for 4h under a nitrogen atmosphere at 60°C, filter out the insoluble matter, and take solution;

[0038] Add 0.21g of phosphotungstic acid to the solution, stir at 50°C for 3h to obtain a homogeneous solution;

[0039] Transfer the homogeneous solution to an electrospinning device for electrospinning. The electrospinning conditions are: voltage 22kV, flow rate 0.4mL / h, and the distance between the needle tip and the current collector plate is 20cm to obtain nanofibers;

[0040] Wash the nanofibers with a mixed solution of acetonitrile and methanol (the volume ratio of acetonitrile and methanol is 1:1), remove N,N-dimethylacetamide solvent a...

Embodiment 2

[0043] This embodiment provides a catalyst for selective oxidation desulfurization of fuel oil and a preparation method thereof. The preparation method specifically includes the following steps:

[0044] Dissolve 0.8g of LiBr in 20mL of N,N-dimethylacetamide, weigh 4.0g of polybenzimidazole and dissolve it in the above solution, reflux at 70°C for 4h under a nitrogen atmosphere, filter out the insoluble matter, and take solution;

[0045] Add 0.44g of phosphomolybdic acid to the solution, and stir at 50°C for 3h to obtain a homogeneous solution;

[0046] Transfer the homogeneous solution to an electrospinning device for electrospinning. The electrospinning conditions are: voltage 20kV, flow rate 0.4mL / h, and the distance between the needle tip and the current collector plate is 20cm to obtain nanofibers;

[0047] Wash the nanofibers with a mixed solution of acetonitrile and methanol (the volume ratio of acetonitrile and methanol is 1:1) to remove N,N-dimethylacetamide solvent a...

Embodiment 3

[0050] This embodiment provides a catalyst for selective oxidation desulfurization of fuel oil and a preparation method thereof. The preparation method specifically includes the following steps:

[0051] Dissolve 0.7g of LiBr in 20mL of N,N-dimethylacetamide, weigh 4.0g of polybenzimidazole and dissolve in the above solution, reflux at 60°C for 4h under a nitrogen atmosphere, filter out the insoluble matter, and take solution;

[0052] Add 0.71g of silicotungstic acid to the solution, stir at 50°C for 3h to obtain a homogeneous solution;

[0053] Transfer the uniform solution to an electrospinning device for electrospinning. The electrospinning conditions are: voltage 25kV, flow rate 0.4mL / h, and the distance between the needle tip and the current collector plate is 20cm to obtain nanofibers;

[0054] Wash the nanofibers with a mixed solution of acetonitrile and methanol (the volume ratio of acetonitrile and methanol is 1:1) to remove N,N-dimethylacetamide solvent and impurit...