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Preparation method of sulfur dioxide and hydrogen sulfide gas adsorbent

A gas adsorbent, sulfur dioxide technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of being easily affected by the environment, easy desorption adsorption capacity, complex preparation process, etc. And the effect, the effect of improving the preparation efficiency

Pending Publication Date: 2022-07-15
AMERIASIA ACTIVATED CARBON PROD CO LTD
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Problems solved by technology

However, in the preparation process of the above-mentioned activated carbon adsorbent, the preparation of activated carbon and the modification of activated carbon are separated, which makes the preparation process complicated and susceptible to environmental influences, such as the influence of air humidity and pollutant concentration, resulting in easy desorption or small adsorption capacity

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  • Preparation method of sulfur dioxide and hydrogen sulfide gas adsorbent

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preparation example Construction

[0027] combine figure 1 As shown, the present invention discloses a preparation method of sulfur dioxide and hydrogen sulfide gas adsorbent, which specifically includes the following steps:

[0028] Step S1, the precursor body is prepared. The precursors, such as coconut shells, are ground, washed and dried to obtain clean precursors.

[0029] Preferably, the particle size of the precursor body after grinding treatment is controlled to be 20-50 mesh to ensure that the final obtained adsorbent has a suitable void size and achieves efficient adsorption of sulfur dioxide and hydrogen sulfide gas. At the same time, the ground and cleaned precursor is dried at 60 to 80° C. for 2 to 3 hours to achieve effective drying of the precursor.

[0030] Of course, precursors of other materials can also be selected, such as fruit shells, walnut shells, apricot pits and wood chips, or even mixed precursors including the above materials can be selected. At this time, according to the structu...

Embodiment 1

[0040] Coconut shells were used as the precursor. First, 10 g of coconut shells were ground and screened to 20-50 mesh, washed with deionized water, and dried at 80°C for 2 hours. Next, the washed precursor was added to 100 g of a 15 wt % cupric chloride solution, immersed for 12 hours, filtered and left to stand for 3 hours. Then, the coconut shells were put into a vacuum drying oven and dried at 80 °C for 2 h. Then, under the protection of nitrogen, the activated coconut shells were heated to 800°C for carbonization treatment for 3h. Finally, under the protection of nitrogen, the target adsorbent was prepared by calcination at 400 °C for 2 h.

Embodiment 2

[0042] Coconut shells were used as the precursor. First, 10 g of coconut shells were ground and screened to 20-50 meshes, washed with deionized water, and dried at 80°C for 2 hours. Next, the washed precursor was added to a mixed solution of 100 g of 10 wt % copper chloride and 5 wt % zinc chloride, immersed for 12 hours, filtered and left to stand for 3 hours. Then, the coconut shells were put into a vacuum drying oven and dried at 80 °C for 2 h. Then, under the protection of nitrogen, the activated coconut shells were heated to 800°C for carbonization treatment for 3h. Finally, under the protection of nitrogen, the target adsorbent was prepared by calcination at 400 °C for 2 h.

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Abstract

The invention discloses a preparation method of a sulfur dioxide and hydrogen sulfide gas adsorbent, which specifically comprises the following steps: S1, preparing a front material body: grinding, cleaning and drying the front material body to obtain a clean front material body; s2, live modification treatment: carrying out dipping treatment and standing placement on the previous material body obtained in the step S1 by using a live modification agent; step S3, drying treatment: putting the front material body subjected to active modification treatment in the step S2 into a vacuum drying box for drying treatment to obtain a dried front material body; step S4, carbonization treatment: under the protection of inert gas, carrying out heating carbonization treatment on the front material body obtained in the step S3; and S5, calcining treatment: calcining the pre-material body subjected to carbonization treatment in the step S4 under the protection of inert gas. By adopting the method disclosed by the invention, the preparation process of a conventional adsorbent can be shortened, the preparation efficiency can be improved, the effects of enlarging gaps of the adsorbent and attaching a catalyst can be achieved, and the adsorption efficiency and effect can be improved.

Description

technical field [0001] The invention belongs to the technical field of adsorbent preparation, and particularly relates to a preparation method of a sulfur dioxide and hydrogen sulfide gas adsorbent. Background technique [0002] As one of the important sources of air pollutants, sulfides such as sulfur dioxide and hydrogen sulfide can stimulate the human respiratory tract and damage the human nervous system and vital organs such as the liver and kidneys. Molecular sieves, etc., benefit from their huge specific surface area and complex pore structure, and are widely used in the field of air purification, including the adsorption and purification of sulfides such as sulfur dioxide and hydrogen sulfide. Among them, activated carbon material is the most common adsorption material due to its advantages of good versatility, certain mechanical strength, and high adsorption speed. [0003] Ordinary activated carbon mainly relies on the interaction force between molecules when adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/20
CPCB01J20/3021B01J20/3085B01J20/3078B01J20/20B01J2220/4881B01J2220/4825
Inventor 施振亚曾国治曾敏杨志翟晓强
Owner AMERIASIA ACTIVATED CARBON PROD CO LTD
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