The adsorption performance of coconut shell activated carbon, the production process method of cocon

Activated carbon has a well-developed pore structure, and the adsorbed molecules enter the adsorption pores through the macropores (R 50nm) and mesopores (2nm R 50nm) through the two transportation channels Micropores (R 2nm), and the molecules and surface groups on the pore surface are combined together by van der Waals force to complete adsorption. Founded in 1996, Nanjing Mulinsen Carbon Industry Co., Ltd. is a professional activated carbon production enterprise integrating scientific research, development, production and sales. Over the past 20 years, the company has been focusing on the production of activated carbon, and has now developed into a subsidiary of Nanjing Mulinsen (deep processing base, mainly producing high-end products such as high-grade pure activated carbon and activated carbon catalysts), Hainan Mulinsen (Southeast Asia coconut shell raw material base, mainly producing coconut shell activated carbon), Gansu Mulinsen (Northwest coconut...).

When the coconut shell activated carbon contains moisture or the circulating gas is wet, the adsorption rate of the coconut shell activated carbon on the organic solvent will generally decrease. But. By using coconut shell activated carbon, which can maintain a considerable adsorption capacity even in the wetted state, it can still be used for water vapor under conditions that are not suitable for water vapor so far.

Especially in the case of solvents that may generate heat due to oxidation and decomposition. By humidifying the adsorbed gas, the temperature rise of the coconut shell activated carbon layer can be suppressed. Inhibits the occurrence of reactions.

Prevent fire. When asking about the occasion of receiving ketone solvents, this becomes an important condition for choosing coconut shell activated carbon. The penetration curves of acetone adsorption were different between dried coconut shell activated carbon and moist coconut shell activated carbon. The penetration time is also one of the most important indicators of the adsorption capacity of coconut shell activated carbon.

1. Raw material screening of coconut shell activated carbon.

The quality of activated carbon depends on the quality of raw materials, and there are two main raw materials for coconut shell activated carbon on the market, one is Hainan coconut shell, and the other is Indonesian coconut shell. The shell skin of Hainan coconut is thin and the density is not very high, while the shell of Indonesian coconut is very thick and has a high density, and the quality of activated carbon processed from Indonesian coconut shell will be better in comparison.

Two: carbonization. Put the screened coconut shell into the carbonization equipment, close the charcoal kiln to let the air enter after high temperature to a certain extent, and then continue to heat and dry the waste heat to make the moisture and wood tar in the coconut shell be boiled out, that is, to form coconut shell charcoal.

Three: Activation. Put the carbonized coconut shell charcoal into the activation furnace, so that the oxygen-containing gas such as water vapor and flue gas (the main component is CO2) are used as activators, and the redox reaction occurs in contact with the carbon at high temperature for activation. The main operating conditions of the activation process include activation temperature, activation time, flow rate and temperature of activator, feeding rate, oxygen content in the activation furnace, etc.

Four: particle size screening of coconut shell activated carbon.

Activated coconut shell charcoal will become coconut shell activated carbon at this time, and then it can be screened according to the customer's particle size requirements, the commonly used coconut shell activated carbon particle size is 6-12 mesh, 8-16 mesh, 10-24 mesh, 20-40 mesh, 200 mesh, 325 mesh, etc.

Five: Packaging. The packaging specification of coconut shell activated carbon is generally 25kg bags or ton bags, and the packaging bag is made of double-layer woven bags, which is strong and moisture-proof.

Coconut shell activated carbon production process relative humidity:

The relative humidity of the gas should be 70-100% during production, and the water vapor can be replenished if the humidity is insufficient, but the liquid water cannot be brought into the activated carbon bed.

The best of the product can be reflected in the production process, and the rigor and steps of coconut shell activated carbon in the production process can see why it is higher than other activated carbon.

Coconut shell activated carbon production process temperature:

The normal operating temperature can be 27-82, the best operating temperature is 32-52, and the desulfurization tower should be insulated when used in cold areas.

1. Take the weight ratio of 1:3 or 1The coconut shell of 5 is mixed evenly with hydrochloric acid solution, placed for a period of time, the coconut shell is taken out, and the particles of the coconut shell are obtained by drying, crushing, sifting, etc.

2. Then take water, crush coconut shell granules with sucrose and disodium hydrogen phosphate, stir and mix, sterilize and disinfect to obtain substances;

3. Then the obtained substance is mixed evenly with the bacterial powder, and placed in the fermentation tank, and then the precipitate is collected, washed and dried with ethanol to obtain the base material;

4. Stir the obtained base material and sodium carbonate evenly, let it stand for aging, spray drying, and then collect the dry matter;

5. Finally, the obtained dry matter is put into the carbonization furnace for carbonization, and then the carbide is collected and washed until it is neutral, and the coconut shell activated carbon can be obtained after drying and crushing.

Application range of coconut shell activated carbon as catalyst:

In general, activated carbon is widely used as a catalyst in oxidation, isomerization, polymerization and other halogenation reactions.

1. Reaction of desulfurization of coal gas;

2. Phosgene synthesis, the use of coconut shell activated carbon can make chlorine and carbon monoxide react quickly at room temperature;

3. Dechlorination reaction for feed water;

4. The catalytic deoxidation of coconut shell activated carbon can be used as a preservative.

The first step, carbonization, is to dry the raw material at a temperature of 170 to 600 and carbonize its 80% R organic tissue with the same amount.

The second step, activation, sends the carbonized material that has been carbonized in the first step into the reaction furnace, reacts with the activator and water vapor, completes its activation process, and makes a finished product.

In the process of endothermic production, the combined gas of CO and H2 is mainly generated, which is used to heat the carbonized material to an appropriate temperature (800 to 1000 degrees), remove all its decomposable substances, and produce a rich pore structure and a huge specific surface area, so that the coconut shell activated carbon has a strong adsorption force.

However, there are also a series of production problems, such as the high cost of activated carbon with high specific surface area due to the release of elemental potassium during the activation process and the high specific surface area activated carbon due to the large use of KOH. The production steps of coconut shell activated carbon seem to be short, but its mass production conditions are harsh, and only Japan and the United States can be commercially produced abroad.

The following matters need to be paid attention to in the production of coconut shell activated carbon carbonization material:

With the increase of the carbonization rate of coconut shell activated carbon, the activation rate of the prepared carbonized material in the activation stage also increased gradually.

With the extension of activation time, the activation rate of carbonized material decreased.

The carbonaceous compounds obtained by rapid carbonization and heating increased with the extension of time in the activation stage, and the activation rate decreased rapidly.

The reason why the carbonization of coconut shell activated carbon has different activation rates and the variation of activation rate with time is actually determined by the influence of different carbonization heating rates on the carbonization structure.

Activated carbon is made of high-quality coal, wood chips, fruit shells, coconut shells and other materials as raw materials, and refined with advanced technology and equipment. The production process of activated carbon is roughly divided into: carbonization, cooling, activation, washing and a series of processes.

The shape of the finished product produced by activated carbon is roughly divided into: granular, columnar, powdery, etc.

Activated carbon has the distinctive characteristics of low and high strength, but it is difficult to make high-performance activated carbon with high impurities, and its appearance is generally black cylindrical activated carbon, amorphous coal granular activated carbon, also known as crushed carbon. Cylindrical activated carbon, also known as columnar activated carbon filter material, is generally made of powdered raw materials and binders through kneading, extrusion, and then carbonization, activation and other processes. It can also be extruded with powdered activated carbon and binder.

Activated carbon is mainly used for water purification, as a new type of water purification material, air purification, purification of toxic gases, waste gas treatment, protection, gas desulfurization and deodorization, solvents and other fields.

I don't know, I only know that activated carbon can remove formaldehyde, coconut carbon is a new type of activated carbon, is a new process to make activated carbon, is a coconut shell as raw material, after high temperature activation, carbonization treatment, while loading photocatalyst, carbon fiber made of a new type of activated carbon, can adsorb formaldehyde, benzene, ammonia and other toxic and harmful nano-scale small molecule polar substances in the air, with fast adsorption speed, for polar molecules, can be recycled.

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The main raw materials of activated carbon can be almost all carbon-rich organic materials, such as coal, wood, fruit shells, coconut shells, walnut shells, apricot shells, date shells, etc. These carbon-containing materials are converted into activated carbon by pyrolysis at high temperatures and pressures in the activation furnace.

Activated carbon. It is black powdery or lumpy, granular, honeycomb-shaped amorphous carbon, and there are also crystalline carbon with regular arrangement. In addition to carbon, activated carbon also contains two types of admixtures:

One is chemically bound elements, mainly oxygen and hydrogen, which remain in the carbon due to incomplete carbonization, or in the activation process, foreign non-carbon elements are chemically combined with the surface of activated carbon, such as when activated with water vapor, the surface of activated carbon is oxidized or oxidized by water vapor; Another type of admixture is ash, which is the inorganic part of activated carbon; Ash is easy to cause secondary pollution in activated carbon.

Traditional quality identification methods.

1. Place the activated carbon in water to see if it will produce bubbles.

If the activated carbon is placed in water, if it produces a series of small bubbles and there is a bubble sound, it means that the activated carbon has strong adsorption capacity and is of particularly good quality.

2. Put the activated carbon in your hand and feel its weight.

High-quality activated carbon is activated carbon with strong adsorption capacity, and activated carbon with strong adsorption capacity must have many pores to facilitate the absorption of harmful substances in the air, so high-quality activated carbon will feel lighter. If the activated carbon you choose is particularly heavy, it means that its adsorption capacity is not strong.

3. Place the activated carbon in a colored liquid to see if the liquid will become lighter.

High-quality activated carbon has a strong adsorption capacity, which can make the color of colored liquid lighter or even colorless, so when the owner buys activated carbon, he can test it with a sample, place the activated carbon into a bottle of liquid dripping with black ink, and place it for 20 minutes to see if the color of the black liquid will fade, and the lighter the color, the stronger the adsorption capacity of the activated carbon.

Spare material, carbonization, cooling, activation, washing, stir-frying, drying, crushing and sifting, coconut shell activated carbon particles, finished product.

Material selection, drying, crushing, screening, activation, pickling, washing, drying, bagging.

Summary. Taking general coconut shell activated carbon as an example, it is generally phosphorus-free. Coconut shell activated carbon is made by pyrolysis of coconut shell under high temperature and high pressure, and the main components are carbon and trace amounts of inorganic salts and impurities.

Among them, most of the organic matter has been volatilized after the coconut shell has been treated at high temperature, so the phosphorus element contained in the coconut shell activated carbon is extremely small and almost negligible. However, it should be noted that the coconut shell activated carbon produced by different manufacturers may be different, and some manufacturers may add chemicals or treatment agents in the manufacturing process, which may cause the coconut shell activated carbon to contain elements such as phosphorus. Therefore, when purchasing coconut shell activated carbon, it is recommended to choose products produced by regular manufacturers that meet relevant national standards and regulations, and carefully check product labels, manuals and other information to understand its specific composition and performance.

Hope mine can help you.

I'm still a little confused, can you be more detailed?

Taking general coconut shell activated carbon as an example, it is generally phosphorus-free. Coconut shell activated carbon is made by pyrolysis of coconut shell under high temperature and high pressure, and the main components are carbon and trace amounts of inorganic salts and impurities. Among them, most of the organic matter has been volatilized after the coconut shell has been treated at high temperature, so the phosphorus element contained in the coconut shell activated carbon is extremely small and almost negligible.

However, it should be noted that the coconut shell activated carbon produced by different manufacturers may be different, and some manufacturers may add chemicals or treatment agents in the manufacturing process, which may be old and cause the coconut shell activated carbon to contain elements such as phosphorus. Therefore, when purchasing coconut shell activated carbon, it is recommended to choose products produced by regular manufacturers that meet the relevant national standards and regulations, and carefully check the product label cracking, instructions and other information to understand its specific composition and performance. Hope mine can help you.