What is the saturated adsorption capacity of activated carbon to styrene

Activated charcoalSaturated adsorption capacity of p-styrene: liveThe adsorption rate of carbon to styrene is 30 of its own weight.

The single use of activated carbon adsorption method has a large working load, a short relative saturation cycle, too frequent regeneration, and increased maintenance work, which cannot meet the requirements. Therefore, it is recommendedLiquid Absorption - Activated Carbon AdsorptionPurify styrene exhaust gases.

When the petroleum substances in the absorption solution account for 40 of the total volume, the absorption rate is the best, and the absorption rate of styrene exhaust gas in the absorption section of the small test liquid is inBetween;

In industrial purification units, the absorption rate of styrene exhaust gas is in the following areasBetween;

In the industrial purification unit, the purification efficiency of the two methods is combined with styrene exhaust gasAbove.

Activated carbon adsorption purification principle:Activated carbon is a very fine carbon particle with a surface area.

Large, and there are small pores in the carbon grains - capillaries. This capillary has a strong adsorption capacity and is in full contact with gases (impurities) due to the large surface area of the carbon particles. When these gases (impurities) touch the capillaries, they are adsorbed and purified.

Liquid Absorption and Purification Principle:The process of treating a mixture of gases with a liquid absorbent to remove one or more of them. In this process, the physical action of dissolving certain gases in solution occurs, which is physical absorption; There are also chemical reactions between chemicals in gas and liquid.

This is chemical absorption.

Liquid Absorption - Activated Carbon Adsorption Principle:According to the solubility of styrene exhaust gas in water.

It is small, but it has good solubility in some petroleum-like substances.

The characteristics and meet the characteristics of exhaust gas purification, the concentration does not exceed the workshop health standard, and the two-stage purification working principle is adopted. The first stage uses high-efficiency liquid absorption, and the second stage uses activated carbon adsorption.

Summary:

1) The adsorption rate of styrene adsorption with activated carbon alone is low, and the effect of liquid absorption and activated carbon adsorption and purification of waste gas is better.

2) To apply the working principle of two-stage purification, it is necessary to solve the technical supporting parameters of the combination of the two methods, as well as the problems of structural optimization and equipment integration.

Volume 14, Issue 3, Treatment Technology 37, Encyclopedia "Activated Carbon Adsorption Method", Beina Chuanglian "Basic Principles of Liquid Absorption and Purification Method".

The amount of benzene adsorbed by activated carbon is related to the variety of activated carbon, and the amount of activated carbon adsorbed by a little amount can reach 10%, but it is difficult to analyze. Benzene can be adsorbed by using benzene adsorption resin dex-pH, the adsorption capacity can reach 10, and it is easy to desorption. For more information, please contact us

Separation of material mesh.

Summary. The adsorption capacity of activated carbon varies depending on the specific situation, including the type of activated carbon, particle size, filling method and other factors. In general, about 30-35 mg of benzene can be adsorbed per gram of activated charcoal.

Of course, the specific adsorption amount needs to be measured experimentally according to the actual situation to obtain an accurate value.

The adsorption capacity of activated carbon varies according to the specific situation of Lusheng, including the type of activated carbon, particle size, filling method and other factors. Generally speaking, each gram of activated carbon can adsorb about 30-35 mg of benzene. Of course, the specific adsorption amount needs to be measured experimentally according to the actual situation to obtain an accurate value.

Can you add, I don't quite understand it.

The adsorption capacity of activated carbon varies depending on the situation, including factors such as type, particle size, and filling method. Generally, each gram of activated carbon can adsorb about 30-35 mg of benzene, but the specific amount of orange absorbed per mu by Xunxiangtuan needs to be determined experimentally to obtain an accurate value.

Activated carbon has a good adsorption and filtration source.

The main purpose of the activated carbon adsorption tower is to remove chemical gas pollutants from DU exhaust gas to meet the needs of DAO microelectronics, nuclear industry, pharmaceutical, chemical, environmental protection, laboratory animal appearance, light industry and other industries. With the development of industry and the expansion of cities, the concentration of harmful gases in the atmosphere increases; With the advancement of technology and the improvement of life, people's demand for pure air has increased. The demand for activated carbon adsorption devices is gradually increasing.

In the waste gas treatment process, a filter device should be set up before passing through the activated carbon adsorption tower, which is what we usually call pretreatment, except for dust-free gas, and the function of the primary filter is mainly to prevent dust from clogging the activated carbon material.

In industrial waste gas treatment, the main factors affecting the adsorption efficiency and service life of activated carbon adsorption devices are: the type and concentration of polluted waste gas, the temperature, pressure, relative humidity, residence time of the exhaust gas stream, etc.

When the actual waste gas treatment is selected, the type of activated carbon in the activated carbon adsorption equipment and the shape of the activated carbon adsorption tower should be determined according to the types and concentrations of pollutants, the temperature of the exhaust gas flow and the treatment air volume.

(1) Molecular polarity, generally speaking, polar adsorption.

The agent preferentially adsorbs in non-polar solvents.

Strong solutes, non-polar adsorbents preferentially adsorb non-polar solutes in polar solvents.

2) Solvent solubility effect: the smaller the solubility, the easier the solute is to be adsorbed (3) Adsorption of homologues: the adsorption amount increases or decreases regularly with the growth of carbon connection (4) Temperature influence:

The adsorption of solutes by adsorbents from solution is an exothermic reaction, usually the temperature increases, and the adsorption capacity decreases, but the adsorption capacity of some substances also increases with the increase of temperature.

In addition, adsorption relies on molecular diffusion, and through stirring**, the degree of liquid phase chaos is accelerated, which is conducive to mass transfer.

Different types of adsorbents have different adsorption effects. Generally, polar molecular (or ionic) adsorbents are easy to adsorb polar molecular (or ionic) adsorbents, and non-polar molecular adsorbents are easy to adsorb non-polar molecular adsorbents. Since the adsorption occurs on the inner and outer surfaces of the adsorbent, the larger the specific surface area of the adsorbent, the stronger the adsorption capacity.

In addition, the particle size, pore structure and distribution of adsorbents, as well as surface chemical properties, also have a great impact on adsorption.

The nature of the adsorbate.

The solubility of the adsorbate in wastewater has a great influence on the adsorption. In general, the lower the solubility of the adsorbate, the easier it is to be adsorbed; When the concentration of adsorbate increases, the adsorption capacity also increases, but after the concentration increases to a certain extent, the adsorption capacity increases very slowly. If the adsorbate is organic, the smaller its molecular size, the faster the adsorption reaction will proceed; Polar adsorbents tend to adsorb polar adsorbents, and non-polar adsorbents tend to adsorb non-polar adsorbents.

The pH of wastewater has an effect on the form (molecules, ions, conjugates, etc.) and solubility of adsorbents in wastewater, and thus has a corresponding impact on the adsorption effect. The effect of wastewater pH on adsorption is also related to the properties of adsorbents. For example, activated carbon generally has a higher adsorption capacity in acidic solutions than in alkaline solutions.

Thermoadsorption reactions are usually exothermic, so the lower the temperature, the more favorable the adsorption. However, in wastewater treatment, the general temperature does not change much, so the temperature has little influence on the adsorption process, and the adsorption operation is usually carried out at room temperature in practice.

The impact of coexistences.

When multiple adsorbates coexist, the adsorption capacity of the adsorbent to one of the adsorbates is lower than that of the adsorbate alone. Suspended solids will block the pores of the adsorbent, and oil substances will concentrate on the surface of the adsorbent to form an oil film, both of which have a great impact on adsorption. Therefore, they must be removed before the adsorption operation.

Contact time. The adsorbate and the adsorbent need to have enough contact time to achieve adsorption equilibrium. The time required for equilibration} depends on the adsorption speed, the faster the adsorption speed, the shorter the time required to reach equilibrium.

1. The properties of activated carbon adsorbents: the larger the surface area, the stronger the adsorption capacity; Activated carbon is a non-polar molecule, which is easy to adsorb non-polar or very low polar adsorbents; The size of activated carbon adsorbent particles, the structure and distribution of pores, and the chemical properties of the surface also have a great influence on adsorption.

2. The properties of adsorbate: it depends on its solubility, surface free energy, polarity, size and unsaturation of adsorbate molecules, concentration of adherents, etc.

3. Wastewater pH value: activated carbon generally has a higher adsorption rate in acidic solution than in alkaline solution. The pH value will affect the state and solubility of the adsorbate in water, and thus affect the adsorption effect. Banquet.

4. Coexisting substances: When a variety of adsorbates coexist, the adsorption capacity of activated carbon for a certain adsorbate is worse than that of a certain adsorbate when only that kind of adsorbate is contained.

5. Temperature: Temperature has little effect on the adsorption of activated carbon.

Many people may not know what activated carbon is used for drying, such as renovating a new house and wanting to remove formaldehyde, you can use activated carbon for adsorption to eliminate these harmful objects. Today, I will introduce to you the relevant content about the performance of activated carbon adsorption and the factors that affect activated carbon adsorption!

Performance of activated carbon adsorption 1. When the pore size of activated carbon is the same, the capacity of their adsorption will increase, and the adsorbed isotherm will expand upward; When their surface area is the same and the pore size is decreasing, their adsorption will increase in the field of low concentrations.

2. When the polarity of the surface of activated carbon increases, the binding force between water and carbon will begin to increase, and when the effective adsorption capacity decreases, the adsorbed isotherm will expand to high concentration.

3. When the molecular weight of the adsorbate increases, the isotherm of the curvature adsorption will be compressed to the side with low buried concentration, and then further expanded to the side with high concentration.

What are the factors that affect the adsorption of activated carbon:

1. The properties of activated carbon.

Because the physical and chemical properties of activated carbon determine its adsorption effect, its properties are related to the material processing methods used in the manufacture of activated carbon, and the three most basic requirements of activated carbon are: the capacity of adsorption should be large, the speed of adsorption should be fast and the mechanical strength should be good.

2. The properties of adsorbents.

Because the solubility of activated carbon adsorption has a certain correlation with the solubility in the solvent, the order of activated carbon adsorption in water is increased in the order of A, B, C, D, and if the solubility is smaller, the easier it is for activated carbon to adsorb.

3. The influence of the pH value of the solution.

Because activated carbon adsorbs minerals and OH in water, but this will affect its adsorption of other ions, usually the lower the pH value, the better its adsorption effect will be, so in practical use, it is necessary to test the best pH value range.

4. The influence of solution temperature.

If the index of adsorption heat is larger, the greater the influence of temperature on adsorption, usually when using activated carbon to treat water, the influence of temperature on adsorption is not very large.

5. The effect of the coexistence of multi-component adsorbates.

When using adsorption to treat sewage, because the water contains more than one kind of pollutant substance, because of the different properties, it may promote each other or interfere with each other when adsorbing them. However, in most cases, the capacity of multiple groups of adsorption will be lower than that of a single group.

There are many factors that affect the adsorption capacity of activated carbon, and almost every parameter change will affect it.

1. Activated carbon particle size.

2. Specific surface area of activated carbon.

3. Void size.

4. Morphology of activated carbon.

5. External conditions, such as air volume, temperature, humidity.