Preparation method of high-efficiency porous iron oxide desulfurizing agent

An iron oxide desulfurizer, high-efficiency technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of low utilization rate of raw materials, short regeneration period, slow mass transfer rate, etc., to achieve high desulfurization performance, The effect of high mass transfer rate and simple process

CN103418233AInactive Publication Date: 2013-12-04CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-12-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A preparation method of a high-efficiency porous iron oxide desulfurizing agent is provided. The method comprises the steps: with Fe(NO3)3.9H2O and an alkali as main reactants and under the action of a surface active agent or polyalcohol as a structure-directing agent, a solid state reaction method is adopted to prepare the porous iron oxide desulfurizing agent for purification of hydrogen sulfide and other typical stench waste gases. The specific surface and the pore structure of the desulfurizing agent can be controlled by the type and the adding amount of the structure-directing agent, the adding amount of the alkali and other factors. The obtained desulfurizing agent shows higher desulfurization performance in a system with a high airspeed and with or without the presence of water vapor, wherein the one-time sulfur capacity can be as high as 26.6% in the presence of the water vapor and is far higher than the sulfur capacity of a current industrial iron oxide desulfurizing agent. At the same time, the solid state reaction method not only has simple process, but also is more environmentally friendly, and greatly reduces the sewage discharge amount and the production load of a subsequent sewage treatment device.
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Description

technical field

[0001] The invention relates to a method for preparing an iron oxide desulfurizer, which belongs to the technical field of material synthesis. The prepared desulfurizer is used for purifying typical malodorous waste gases such as hydrogen sulfide. Background technique

[0002] Industrial waste gas pollution, especially some toxic and harmful odorous waste gas emissions, has become a huge obstacle to my country's economic development and social progress, and the establishment of a harmonious society. With the rapid development of petroleum refining, chemical industry, chemical pharmaceutical and other organic chemical industries, a large amount of organic and inorganic waste gas is discharged into the atmosphere, which has a serious impact on the environment, among which the impact of acid waste gas with foul smell is the most prominent. Sulfuric acid-containing malodorous gas not only has a serious impact on the ecological environment, but also has great harm...

Examples

Embodiment 1

[0014] This example is the preparation of iron oxide desulfurizer by solid phase reaction method.

[0015] (1) Weigh Fe(NO 3 ) 3 9H 2 O, KOH and PEG;

[0016] (2) Grind the above materials respectively until the particle size is 100-200 mesh, and grind the Fe(NO 3 ) 3 9H 2 O is fully mixed with PEG;

[0017] (3) To Fe(NO 3 ) 3 9H 2 Add the ground KOH to the mixture of O and polyethylene glycol (PEG), and stir rapidly to make it react;

[0018] (4) Wash the product obtained in step (3) with distilled water to pH = 7 to obtain a desulfurizer precursor and dry it at 100°C for 12 hours;

[0019] (5) The obtained product was calcined at 500°C for 2 hours to obtain the desired iron oxide desulfurizer.

[0020] The evaluation of desulfurizer adopts the water system. The specific reaction conditions are: the raw material gas is a mixture of methane and hydrogen sulfide, H 2 The concentration of S is 3948mg / m 3 . Add 3g of porous iron oxide desulfurizer with a particle s...

Embodiment 2

[0025] This example is the preparation of iron oxide desulfurizer by solid phase reaction method. Same as the preparation method of example 1, just change Fe(NO 3 ) 3 9H 2 The ratio of O to the structure-directing agent is such that the ratios of the two are 1:0.008, 1:0.01, 1:0.013, and 1:0.016, respectively. The specific surface and pore structure of the obtained desulfurizer are shown in Table 2.

[0026] Table 2 Specific surface and pore structure of desulfurizer

[0027]

Embodiment 3

[0029] This example is the preparation of iron oxide desulfurizer by solid phase reaction method. Same as the preparation method of Example 1, except that the structure-directing agent adopted is cetyltrimethylammonium bromide (CTAB), and the strong base and Fe(NO 3 ) 3 9H 2 The molar ratios of O are 2, 3, 4, 5, respectively. The specific surface and pore structure of the obtained desulfurizer are shown in Table 3.

[0030] Table 3 Specific surface and pore structure of desulfurizer

[0031]