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A method for recovering and treating sulfur dioxide and simultaneously producing hydrogen

A sulfur dioxide, recovery and treatment technology, applied in chemical instruments and methods, gas treatment, separation methods, etc., can solve the problems of equipment corrosion and high desulfurization costs, and achieve the effects of suitable reaction conditions, strong operability, and improved removal efficiency.

Active Publication Date: 2018-07-24
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of traditional alkali desulfurization is high, and the equipment is seriously corroded, especially the energy loss in the conversion process of sodium sulfite solution is very large

Method used

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  • A method for recovering and treating sulfur dioxide and simultaneously producing hydrogen

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A. Catalyst preparation: 0.5 mmol Bi(NO 3 ) 3 • 5H 2 O with 0.5 mmol NH 4 VO 3 dissolved in nitric acid solution (V 硝酸 :V 水 =1), and adding absolute ethanol to obtain a bismuth vanadate precursor solution. The bismuth vanadate precursor solution was loaded on the surface of FTO conductive glass by drop coating method. After drying at 60 °C, calcined at 350 °C for 1 h with a heating rate of 5 °C min -1 , after naturally cooling down to room temperature, a bismuth vanadate catalyst is obtained;

[0022] B. In the photocatalytic device, the concentration is 0.0001 mol L -1 Sodium hydroxide solution is used as electrolyte solution, platinum wire electrode is used as cathode, and FTO conductive glass loaded with bismuth vanadate is used as photoanode. Pass 1 ppm of sulfur dioxide gas into the device. Under the action of photoelectrocatalysis, the amount of hydrogen produced in the above experiment was tested.

Embodiment 2

[0024] A. Catalyst preparation: 0.001mmol Bi(NO 3 ) 3 • 5H 2 O with 0.001 mmol NH 4 VO 3 dissolved in nitric acid solution (V 硝酸 :V 水 =3), and adding absolute ethanol to obtain a bismuth vanadate precursor solution. The bismuth vanadate precursor solution was loaded on the surface of FTO conductive glass by drop coating method. After drying at 40 °C, it was calcined at 500 °C for 4 h with a heating rate of 1 °C min -1 , after naturally cooling down to room temperature, a bismuth vanadate catalyst is obtained;

[0025] B. In the photocatalytic device, the addition concentration is 0.75 mol L -1 Sodium hydroxide solution is used as electrolyte solution, platinum wire electrode is used as cathode, and FTO conductive glass loaded with bismuth vanadate is used as photoanode. Pass 200 ppm of sulfur dioxide gas into the device. Under the action of photoelectrocatalysis, the amount of hydrogen produced in the above experiment was tested.

Embodiment 3

[0027] A. Catalyst preparation: 20mmol Bi(NO 3 ) 3 • 5H 2 O with 20mmol NH 4 VO 3 dissolved in nitric acid solution (V 硝酸 :V 水 =5), and adding absolute ethanol to obtain a bismuth vanadate precursor solution. The bismuth vanadate precursor solution was loaded on the surface of FTO conductive glass by drop coating method. After drying at 100 °C, it was calcined at 600 °C for 3 h with a heating rate of 2 °C min -1 , after naturally cooling down to room temperature, a bismuth vanadate catalyst is obtained;

[0028] B. In the photocatalytic device, the addition concentration was 5 mol L -1 Sodium hydroxide solution is used as electrolyte solution, platinum wire electrode is used as cathode, and FTO conductive glass loaded with bismuth vanadate is used as photoanode. Pass 500 ppm of sulfur dioxide gas into the device. Under the action of photoelectrocatalysis, the amount of hydrogen produced in the above experiment was tested.

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Abstract

The invention belongs to the technical fields of environmental protection and energy sources, and particularly relates to a method for simultaneously recovering sulfur dioxide and producing hydrogen. The method comprises the following step: after carrying out dust removal on boiler coal flue gas, introducing the flue gas into a photoelectrochemical desulfurization hydrogen production system, wherein the photoelectrochemical desulfurization hydrogen production system uses sodium hydroxide as an electrolyte, a platinum wire electrode as a cathode and bismuth-vanadate-carried FTO (fluorine-doped tin oxide) conducting glass as a photoanode. The sulfur dioxide gas is introduced into the reaction system in the desulfurization hydrogen production process; and in the photoelectrochemical process, sulfite oxidation occurs at the anode, and water reduction occurs at the cathode to generate hydrogen. Compared with the existing desulfurization technique, the desulfurization method has high desulfurization efficiency, prepares the green energy hydrogen in situ by utilizing the photoelectrochemical principle, efficiently utilizes the energy conversion generated by the traditional desulfurization process, and has the advantages of high commercial value, simple equipment and low treatment energy consumption.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and energy, and in particular relates to a method for recovering and treating sulfur dioxide and simultaneously producing hydrogen. Background technique [0002] Sulfur dioxide emitted from petroleum refining, burning of fossil fuels and chemical industry has become one of the most important pollutants in the atmosphere. The acidic gas characteristics of sulfur dioxide make it easy to form sulfate aerosols in the atmosphere, which in turn leads to acid precipitation, such as acid rain, which will pollute air, soil, water and other ecological environments and cause serious harm to human health. Therefore, effectively controlling the emission of sulfur dioxide in flue gas has become the focus of relevant researchers in various countries. [0003] The most commonly used desulfurization method is the lye absorption method. Sodium sulfite solution is obtained by fully absorbing sulfu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B1/14C25B11/06B01D53/86B01D53/50
CPCB01D53/8609B01D2258/0283C25B1/04C25B1/14C25B11/077Y02E60/36
Inventor 张立武韩瑾
Owner FUDAN UNIV
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