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Ferric oxide desulfurizer formed by self-framework and preparation method thereof

An iron oxide desulfurizer and skeleton technology, which is applied in the field of gas purification catalysts, can solve problems such as difficult reactions, complex components, and large waste desulfurization dosage, and achieve the effects of guaranteed stability, improved performance, and increased sulfur capacity

Active Publication Date: 2010-09-29
SHANXI HENGXING CATALYTIC PURIFICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. The desulfurization equipment is huge, the energy consumption is high, the desulfurization agent is replaced frequently, the waste desulfurization dose is large, and the composition is complex, so it is not easy to recycle
[0005] 3. Waste desulfurizers can only be buried or stacked in the open air, causing serious environmental pollution
The iron oxide desulfurizer prepared by high-pressure physical method is difficult to combine with H due to its compact structure. 2 S reacts and cannot be used for desulfurization of gases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 2KgFeSO 4 ·7H 2 O is prepared into a 20% aqueous solution, and 10% NaOH solution is slowly added to it for neutralization reaction. The reaction temperature is controlled at 20-50°C. When the pH value of the system reaches 6.5, the reaction is stopped, and the reactant is pressure filtered and washed directly with water. To soluble salt is 1.0%, moisture content is the filter cake of 40%.

[0029] The filter cake is extruded into strips, put into a drying furnace, fed with hot air, and oxidized and dried at 60-80°C for 2 hours to obtain a finished iron oxide desulfurizer.

[0030] The iron oxide desulfurizer obtained in this embodiment contains Fe 2 o 3 71%, H 2 O (crystal water, free water) 26%. The pore volume is 0.53mL / g, the porosity is 61%, and the strength is 43N / cm. CO free 2 No O 2 time, 500h -1 Sulfur capacity is 31%; with CO 2 (over 40%) O-free 2 time, 500h -1 The sulfur capacity is 29%.

Embodiment 2

[0032] Take 2KgFeSO 4 ·7H 2 O is prepared into a 30% aqueous solution, and 10% KOH solution is slowly added to it for neutralization reaction, and the reaction temperature is controlled at 20-55°C. When the pH value of the system reaches 7.0, the reaction is stopped, and the reactant is press-filtered and washed directly with water. To soluble salt is 1.2%, moisture is 50% filter cake.

[0033] The filter cake is extruded into strips, put into a drying furnace, fed with hot air, and oxidized and dried at 40-60°C for 3 hours to obtain a finished iron oxide desulfurizer.

[0034] The iron oxide desulfurizer obtained in this embodiment contains Fe 2 o 3 73%, H 2 O (crystal water, free water) 25%. The pore volume is 0.56mlL / g, the porosity is 67%, and the strength is 48N / cm. CO free 2 No O 2 time, 500h -1 Sulfur capacity is 33%; with CO 2 (over 40%) O-free 2 time, 500h -1 The sulfur capacity is 31%.

Embodiment 3

[0036] Take 2KgFeSO 4 ·7H 2 O was prepared as a 30% aqueous solution, and 6% NH 4 The OH solution is used for neutralization reaction, and the reaction temperature is controlled at 20-60°C. When the pH value of the system reaches 7.5, the reaction is stopped, and the reactant is press-filtered and washed directly to a filter cake with a soluble salt of 2.1% and a water content of 48%. .

[0037] The filter cake is extruded into strips, put into a drying furnace, fed with hot air, and oxidized and dried at 20-45°C for 3 hours to obtain the finished iron oxide desulfurizer.

[0038] The iron oxide desulfurizer obtained in this embodiment contains Fe 2 o 3 68%, H 2 O (crystal water, free water) 27%. The pore volume is 0.44mL / g, the porosity is 51%, and the strength is 53N / cm. CO free 2 No O 2 time, 500h -1 Sulfur capacity is 35%; with CO 2 (over 40%) O-free 2 time, 500h -1 The sulfur capacity is 26%.

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Abstract

The present invention relates to one kind of ferric oxide desulfurizer formed on its own skeleton. The ferric oxide desulfurizer is prepared through the reaction of alkali solution and soluble ferrous salt solution to obtain Fe(OH)2 and corresponding soluble salt, pressure filtering the resultant, water washing, extruding the filter cake into strip, and oxidizing and stoving with hot air to obtain ferric oxide desulfurizer. The ferric oxide desulfurizer has Fe2O3 content of 50-80 %, pore volume of 0.4-0.7 ml / g, porosity of 40-70 %, strength of 40-60 N / cm, sulfur capacity of 30-40 %.

Description

technical field [0001] The invention relates to a gas purification catalyst, in particular to an iron oxide desulfurizer. The invention also relates to a preparation method of the iron oxide desulfurizer. Background technique [0002] Iron oxide has been widely used as a catalyst for removing hydrogen sulfide and part of organic sulfur in gas under normal temperature conditions. It is mainly used for semi-water gas, water gas, coke oven gas, natural gas, biogas, petrochemical and fertilizer production. 2 H in raw gas such as regeneration gas 2 S removal. Iron oxide desulfurizers can be divided into two types in terms of use forms: one is to use powdered iron oxide attached to other relatively loose substances (such as wood chips); the other is to use certain types of binders (such as gypsum, lime , cement, etc.) molding use. The common defects of the above two desulfurizers are: [0003] 1. The iron oxide content as the desulfurization active ingredient is greatly reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745
Inventor 霍保根蔡临民田凤军
Owner SHANXI HENGXING CATALYTIC PURIFICATION
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