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Diesel oil high-efficiency selective catalytic oxidation desulfurization method

A catalytic oxidative desulfurization and selective technology, applied in chemical instruments and methods, catalyst activation/preparation, and purification with oxygenated compounds, etc., can solve the problem of unoptimistic removal effect and achieve good selective catalytic oxidation removal efficiency , the effect of high yield and good application prospects

Active Publication Date: 2019-09-10
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing catalytic oxidation desulfurization technology, it often has a good effect on the removal of thiophene (Th), benzothiophene (BT) or dibenzothiophene (DBT), but the removal of dimethyldibenzothiophene (DMDBT) ) and other macromolecular sulfur-containing compounds are not optimistic. Therefore, in the catalytic oxidation desulfurization technology, the problem of competitive oxidation of complex components such as olefins, cycloalkanes, and aromatics in diesel oil is overcome, and the two components in diesel oil are selectively removed. The removal of macromolecular sulfur-containing compounds such as methyl dibenzothiophene (DMDBT) is desired

Method used

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  • Diesel oil high-efficiency selective catalytic oxidation desulfurization method
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Examples

Experimental program
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Effect test

Embodiment 1

[0026] Preparation of Sodium Type Heteroatom Titanium Nanotubes (Na-Fe-TiNTs):

[0027] In a 50mL flask, add 4ml of tetrabutyl titanate and 20mL of ethanol, stir at room temperature for 1h, then add 0.076g of ferric nitrate and 4ml of 0.5M / L hydrochloric acid, and hydrolyze at 90°C for 48h. After sealing, the crystallization kettle was placed in an oven at 150°C for hydrothermal crystallization for 24 hours, then cooled to room temperature naturally, and the obtained solid was washed with deionized water until PH≈7. Dry the obtained solid in an oven at 80° C. to obtain sodium-type framework heteroatom titanium nanotubes (Na-Fe-TiNTs).

Embodiment 2

[0029] Preparation of hydrogen-type iron heteroatom titanium nanotubes (H-Fe-TiNTs):

[0030] Take 2g of the prepared sodium-type iron heteroatom titanium nanotubes (Na-Fe-TiNTs), add 500mL of 0.01mol / L HCL solution, seal and stir at room temperature for 12h, let it stand, and filter the obtained titanium nanotube solids with deionized Wash with water until the pH is approximately equal to 7. Then, the iron heteroatom titanium nanotube solid obtained was dried overnight in an oven at 80° C. to obtain hydrogen iron heteroatom titanium sodium nanotubes (H-Fe-TiNTs).

Embodiment 3

[0032] Preparation of Iron Heteroatom Titanium Nanomaterial Catalyst:

[0033] In a 50mL flask, add 4ml of tetrabutyl titanate and 20mL of ethanol, stir at room temperature for 1h, then add 0.076g of ferric nitrate and 4ml of 0.5M / L hydrochloric acid, and hydrolyze at 90°C for 48h. After sealing, the crystallization kettle was placed in an oven at 150°C for hydrothermal crystallization for 12 hours, then cooled to room temperature naturally, and the obtained solid was washed with deionized water until PH≈7. After hydrogen ion exchange, add 500 mL of 0.2 mol / L HCL solution, seal it, stir at room temperature for 12 hours, let it stand, and wash the solid obtained by suction filtration with deionized water until the pH is approximately equal to 7. Then, the obtained solid was dried overnight in an oven at 80° C. to obtain an iron heteroatom titanium nanomaterial catalyst mixed with titanium nanosheets and titanium nanoparticles.

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Abstract

The invention relates to a diesel oil high-efficiency selective catalytic oxidation desulfurization method. A titanium nanometer material catalyst and an oxidant are contacted with the diesel oil to selectively catalyze oxidation of the diesel oil to remove the second component under the condition that the first component competes for oxygen consumption. The diesel oil comprises a first componentand a second component; the first component comprises one or more of olefins, aromatic hydrocarbon, or cycloalkanes; the second component is a sulfur-containing compound comprising mercaptan, thioether, thiophene, benzothiophene, dibenzothiophene or 4,6-dimethyldibenzothiophenes. The titanium nanometer material catalyst prepared by the invention selectively removes sulfur-containing compounds suchas dimethyl dibenzothiophene (DMDBT) and other macromolecules in diesel oil under the condition of competitive oxidation of complex components such as olefins, cycloalkanes and aromatic hydrocarbons,the desulfurization efficiency of the diesel oil reaches 98.2%, and has good application prospect in the field of oxidative desulfurization of diesel oil.

Description

technical field [0001] The invention belongs to the field of diesel oil desulfurization, and in particular relates to a method for selective catalytic oxidation desulfurization of diesel oil. Background technique [0002] With the development of the economy, the number of motor vehicles in my country has increased exponentially, and SOx emissions from diesel vehicles are currently one of the important reasons for air pollution. Especially in the central and eastern regions of my country recently, a large area of ​​severe air pollution has seriously affected economic development and national health. my country has enacted more stringent environmental regulations to promote the upgrading of fuel oil. It is foreseeable that if the air pollution is not eliminated, the upgrading of oil products will continue. [0003] Oxidative desulfurization (ODS) technology has natural advantages in removing condensed ring thiophene sulfides and their derivatives, which are difficult to remov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/04B01J37/10B01J23/847B01J23/78B01J23/745
CPCB01J23/745B01J23/78B01J23/8472B01J37/10C10G27/04C10G2400/04
Inventor 姚月梅世铎吕树祥韶佩佩
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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