Process for desulfurization of oil products by electrochemical catalytic reduction

An electrochemical and reduction technology, applied in the field of oil desulfurization, can solve the problems of difficulty in meeting the requirements of large processing capacity, slow biological desulfurization, and difficulty

Inactive Publication Date: 2005-11-23
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the speed of biological desulfurization is slow, and it is difficult to meet the requirements of large industrial processing capacity, and the sulfur content in light oil products is not concentrated in the concentration of 100-1000ppm, so it is not easy to use biological desulfurization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] 1. Preparation of Composite Cathode

[0016] a. Preparation of cathode electrode preform

[0017] The steps of preparation are as follows:

[0018] (1). The selected carbon fiber (including one of polyacrylonitrile carbon fiber, pitch-based carbon fiber, micelle-based carbon fiber or its mixed fiber material) is subjected to an activation treatment (chemical activation treatment), and the activator can be selected from alkali, salt and acid , such as sodium hydroxide, potassium hydroxide, zinc chloride, phosphoric acid, the amount of chemical activator for one activation chemical treatment is 10%-50% of the carbon fiber weight; the chemical activation temperature is 700-900°C; the chemical activation time is 0.5- 1h; the chemical activation atmosphere is a nitrogen atmosphere, and the activator is washed off with distilled water after activation.

[0019] (2). After the first activation, it will undergo a second activation treatment (physical activation treatment). In...

Embodiment 1

[0048] Add BpyPF to the closed electrolyzer 6 150mL, 10mL phase transfer catalyst, 70mL absolute ethanol, 25mL distilled water, magnetically stir evenly, add 40mL raw material oil (catalytic gasoline), put the electrolytic reduction electrode pair (platinum as the anode, self-made electrode as the cathode) into the electrolytic cell, add Voltage -2.5V electrolysis for 3 hours. After electrolysis, stand still for 30 minutes and take samples for total sulfur analysis with a sulfur and nitrogen analyzer. When other conditions remain the same, when the voltage is -1.7V, -2.1V, -2.8V, -3.2V, electrolyze for 3 hours. After electrolysis, stand still for 30 minutes to take samples, and use a sulfur and nitrogen analyzer for total sulfur analysis. The results are shown in Table 1.

[0049] Voltage V

[0050] Note: The sulfur content of raw oil is 90.251ppm.

Embodiment 2

[0052] Add BpyPF to the closed electrolyzer 6 150mL, 10mL phase transfer catalyst, 70mL absolute ethanol, 25mL deionized water, stir evenly with magnetic force, add 40mL raw material oil (catalytic diesel oil), put the electrolytic reduction electrode pair (graphite is the anode, self-made electrode is the cathode) into the electrolytic cell , plus voltage -2.5V electrolysis for 3 hours. After electrolysis, stand still for 30 minutes to take samples, and use a sulfur and nitrogen analyzer for total sulfur analysis. When other conditions remain the same, when the voltage is -1.7V, -2.1V, -2.8V, -3.2V, electrolyze for 3 hours. After electrolysis, stand still for 30 minutes and take samples for total sulfur analysis with a sulfur and nitrogen analyzer. The results are shown in Table 2.

[0053] Voltage V

[0054] Note: The sulfur content of raw oil is 1624ppm.

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Abstract

The invention relates to a process for desulfurization of oil products which comprises using water-soluble ionic liquid as medium supporting electrolyte, using own made porous composite material with specific surface area and high absorbability property as the cathode, carrying out electrochemical reduction treatment to the oil, and removing the sulfur of the sulfide in the oil through transforming it into H2S.

Description

technical field [0001] The invention relates to a method for desulfurizing oil products. Specifically, a self-made porous material with a large specific surface area and high adsorption performance is used as a composite cathode, and the oil is desulfurized by electrochemical reduction in the presence of an electrolyte. Background technique [0002] The economic development of all countries in the world is inseparable from the production and consumption of oil, an important energy source. Over the past century, the rapid development of the petroleum industry and the automobile industry has made great contributions to human civilization and social progress. However, due to the sulfur compounds contained in oil products (mainly gasoline, diesel fuel, etc.), SO 2 , SO 3 It is one of the main pollutants of the environment. With the increasing awareness of environmental protection around the world, countries have adopted a series of measures successively, and the requirements ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G32/02
Inventor 汪树军王文波张伟刘红研
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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