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Preparation method of composite modified activated carbon desulfurization reagent

A technology of activated carbon preparation and composite modification, applied in separation methods, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve the problems of unsatisfactory desulfurization efficiency, slow desulfurization speed and low efficiency of activated carbon, and alleviate energy problems. , the reduction of agricultural and forestry waste, the effect of desulfurization efficiency and improvement

Inactive Publication Date: 2019-01-25
TIANJIN PURUITE PURIFICATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the desulfurization speed of single activated carbon is slow and the efficiency is low. In order to improve the performance of activated carbon desulfurization, people have modified activated carbon one after another. Modified activated carbon can overcome some shortcomings and limitations of ordinary activated carbon. Activated carbon can be significantly enhanced in adsorption and catalysis, and the desulfurization efficiency can be improved after adding activating agent or activator or using some kind of modification technology to treat activated carbon.
However, the traditional method only performs a single modification on activated carbon, and its desulfurization efficiency is not ideal.

Method used

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Examples

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preparation example Construction

[0019] The preparation method of the present invention comprises the following steps,

[0020] 1) preparation of activated carbon: comprising the following steps,

[0021] A, walnut shells are mixed and stirred with zinc chloride solution according to the material-liquid ratio of 1: (4~5) g / ml after cleaning, drying, pulverizing;

[0022] B. Put it in a muffle furnace at 250-280°C for 1-1.5h, then at 500-550°C for 0.5-1h;

[0023] C. Washing with distilled water, drying, and grinding to 0.05-0.07mm;

[0024] 2) Oxidation of activated carbon: Mix activated carbon and concentrated sulfuric acid according to the ratio of material to liquid of 1: (15-20) g / ml, keep at 180-230°C for 1-2.5 hours, then wash, dry and roast in sequence;

[0025] 3) Activated carbon modification: Add the activated carbon from step 2) into the ferrous sulfate solution, the weight ratio of activated carbon to ferrous sulfate is 1:(0.3-0.5), mix in vacuum for 6-8 hours, wash and dry.

[0026] Wherein, t...

Embodiment 1

[0031] The preparation method of the present invention comprises the following steps,

[0032] 1) preparation of activated carbon: comprising the following steps,

[0033] A, walnut shells are mixed and stirred with zinc chloride solution according to the material-liquid ratio of 1:4.5g / ml after cleaning, drying and pulverizing;

[0034] B. Put it in a muffle furnace for 1.2h at 270°C, then keep it at 540°C for 0.8h;

[0035] C. Washing with distilled water, drying, and grinding to 0.06mm;

[0036] 2) Oxidation of activated carbon: Mix activated carbon and concentrated sulfuric acid according to the ratio of material to liquid of 1:18g / ml, keep at 200°C for 2h, then wash, dry, and roast in sequence. The drying temperature is 100°C, and the roasting temperature is 360°C. ℃, roasting for 2.5h;

[0037] 3) Activated carbon modification: Add the activated carbon in step 2) to the ferrous sulfate solution, the weight ratio of activated carbon to ferrous sulfate is 1:0.4, the con...

Embodiment 2

[0039] The preparation method of the present invention comprises the following steps,

[0040] 1) preparation of activated carbon: comprising the following steps,

[0041] A, walnut shells are mixed and stirred with zinc chloride solution according to the ratio of material to liquid at 1:5g / ml after cleaning, drying and pulverizing;

[0042] B. Put it in a muffle furnace at 250°C for 1.5h, then at 550°C for 0.5h;

[0043] C. Washing with distilled water, drying, and grinding to 0.07mm;

[0044] 2) Activated carbon oxidation: Mix activated carbon and concentrated sulfuric acid according to the ratio of material to liquid of 1:15g / ml, keep at 230°C for 1h, then wash, dry, and roast in sequence. The drying temperature is 120°C, and the roasting temperature is 350°C. ℃, roasting for 2h;

[0045] 3) Activated carbon modification: join the activated carbon in step 2) into the ferrous sulfate solution, the concentration of the ferrous sulfate solution is 0.04mol / L, the weight rati...

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Abstract

The invention relates to a preparation method of a composite modified activated carbon desulfurization reagent. The preparation method comprises the following steps: 1) A, washing, drying and crushingwalnut shells, and then mixing and stirring with a zinc chloride solution according to the material / liquid ratio of 1 to (4 to 5) g / ml; B, putting the mixture into a muffle furnace and keeping for 1to 1.5 h at the temperature of 250 to 280 DEG C; then keeping for 0.5 to 1 h at the temperature of 500 to 550 DEG C; C, washing with distilled water, drying and grinding until the size is 0.05 to 0.07mm; 2) mixing activated carbon and concentrated sulfuric acid according to the material / liquid ratio of 1 to (15 to 20) g / ml; keeping for 1 to 2.5 h at the temperature of 180 to 230 DEG C; then washing, drying and roasting; 3) adding the activated carbon in step 2) into a ferrous sulfate solution, wherein the weight ratio of the activated carbon to the ferrous sulfate is 1 to (0.3 to 0.5); mixingfor 6 to 8 h under a vacuum state; washing and drying. The composite modified activated carbon desulfurization reagent has a good desulfurization effect and high efficiency.

Description

technical field [0001] The invention relates to the technical field of preparation of activated carbon desulfurizers, in particular to a preparation method of a composite modified activated carbon desulfurizer. Background technique [0002] People's social and economic activities are inseparable from energy, and the use of energy, especially the use of coal and oil, causes sulfur emissions. Sulfur exists in a large amount in the environment as sulfur oxides, and some of it exists as hydrogen sulfide and organic sulfur (such as mercaptan, sulfide, dimethyl sulfide, etc.), and produces a strong irritating odor pollution. The main pollutants of sulfur in the atmosphere are sulfur dioxide, sulfur trioxide and sulfate, which mainly come from the combustion of fossil fuels, smelting of sulfur-containing ores, and production of sulfuric acid and phosphate fertilizers. The main sulfur pollutants in wastewater are sulfate and hydrogen sulfide, and some acidic mine waters contain lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J23/745B01D53/86B01D53/02C02F1/28B01D53/50B01D53/48C02F101/10
CPCB01J20/20B01D53/02B01D53/8606B01D53/8609B01D2253/102B01D2253/112B01D2257/302B01J20/0229B01J20/0281B01J23/745B01J2220/4806B01J2220/4825C02F1/281C02F1/283C02F2101/101
Inventor 杨晶晶仝雪城金凤琪张天喜
Owner TIANJIN PURUITE PURIFICATION TECH
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