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Activated Alumina
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  • powder activated alumina
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  • activated alumina generator

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  • Highly versatile activated alumina 
  • Impressive crush strength 
  • Larger water adsorption capacity 
  • Long service life 
  • Good for PSA processes

Your Reliable Activated Alumina Manufacturer

For those in need of a desiccant that can do a good job, then activated alumina is what you buy. The activated alumina is excellent and will be of good use for a range of gas and liquid adsorption applications. SWT has been making activated alumina for over two decades now, this should be good news to those who want a brand with experience. 

The activated alumina you buy from SWT also has both crush strength and attrition resistance on another level. You can always rely on the brand to give you good performance-activated alumina. This activated alumina would be ideal for different types of applications you may have to handle. 

The SWT-activated alumina will have better water adsorption capacity. If you compare it to a molecular sieve, the activated alumina is better at such a job. This is mostly when you need better adsorption performance in high relative humidity. 

The activated alumina you buy from SWT will have impressive service life with some amazing performance even below dew point applications. It may be why you would get them in small and large dryers in the house or commercial settings. So, whichever application you may have in mind, this would be a popular choice as a desiccant. If you need one, buy it from SWT today. 

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Activated Alumina: The Efficient and Versatile Desiccant


The best activated alumina will be a good desiccant for many people. You just need to learn more about it to find out it will be a good product for you to buy right now. Below is a comprehensive guide for you to learn more about activated alumina. 

What is Activated Alumina?

types of activated alumina

We can define activated alumina as an aluminum oxide that will have a wide of uses in different industries. New reports show that the use of the activated alumina is expected to rise in the coming years. It is why a company such as SWT is here to create the best activated alumina in the market. 

Activated alumina is a highly porous material that can be used as a desiccant. This means would be able to adsorb water from air. The same activated alumina would also be used to filter fluoride, selenium, and arsenic in the drinking water. 

It mostly used as a desiccant because it comes with a high surface area that makes it to adsorb a lot more water even better. As such, expect to come across this type of desiccant in different industries. 

Since it is also a stable aluminum oxide form, it does not necessarily have to be active chemically to work great. Take note that it is not used as a sorbent. 

Activated will also have good characteristics such as high crush strength, resistance to chemicals, resistant to possible thermal shocks, and more. As such, you would always have a high porosity and also increased surface area to work on various projects too. 

What are the Properties of Activated Alumina?

activated alumina properties

SWT makes the most desirable form of activated alumina. It is the activated alumina balls. These balls are available in different sizes so that you would pick the alumina material knowing that it will be good for your application. Here are some of the vital properties of activated to know about. 

  • The ball size is uniform 

The activated alumina will have a uniform ball size. This is vital based on the different applications you are likely to use activated alumina. Let us say you are using it for a high-pressure dehydration process. The uniform size helps in minimizing potential pressure drop thus making the dehydration process easy to accomplish. 

Also, this material strong to avoid adsorption segregation. Even if you use it in pneumatic loading, it will always minimize channeling and give you a better efficient performance. 

  • High crush strength 

The crush strength is important for it to handle the tough applications that would require it to keep working under high pressure. A good example is when using them in a rapid pneumatic tower loading. Also, you can use them in other types of taller towers making the desiccant use more efficient. 

Activated alumina is still resistant to amine attack. So, you find it being used in the dehydrating of acid containing liquid and gas impurities such as CO2. 

  • Low abrasion 

Those using activated alumina will also notice it has low abrasion too. The result is that there will be less dusting even during transport and loading. The service life of the activated alumina will generally be better. Also, there is no much reduction of pressure drop thanks to low abrasion. 

Maintenance of your equipment also becomes easier since there not much dust in the machine. Also, the valves can last long since the streams are not dusty. That is not something you would find with other dustier products. 

  • The adsorptive capacity is high 

Of course, anyone who is looking for a desiccant want to be sure that the choice of an activated alumina product is the right one. Most of the time, activated alumina will be highly rated because of its high-water adsorption capacity. 

When you place an order for activated alumina, we will ensure it is packed correctly before shipping. It can be done in different quantities depending on what you need. It can be in bags, steel drums, or super sacks. 

If you have any queries on the properties of activated alumina, talk to the SWT customer care team for more help. 

What are the Uses of Activated Alumina?

activated alumina uses

Activated alumina will have many applications. It simply depends on what you hope to achieve. Here the popular industrial uses of activated alumina. 

  • As a catalyst 

Activated alumina will commonly be used as a catalyst in different applications.  Most of the time it will be the adsorption of different catalysts in a process such as polyethylene production. It can serve the same purpose during hydrogen production. 

Still on catalysts applications, it will be a selective adsorbent in different chemicals. This includes fluoride, arsenic, and sulfur removal from fluid streams. This would be the popular clause catalyst process. 

  • As a desiccant 

Activated alumina will always be a great option as a desiccant. It will work through the process of adsorption. This involves in absorbing of the water molecules in an application. Let us say it is a stream of air, the water molecules will be trapped while the dried air would be allowed to pass via the activated alumina filter. 

The process of adsorption is reversible. When the activated alumina media gets saturated, desorption process is undertaken to release the water molecules. During this process, the activated alumina desiccant would be heated up to 200 degrees C. This method is also called as regenerating of the activated alumina. 

  • Fluoride adsorbent 

This is when you have to process water and make it safe for drinking. In this case activated alumina would be used in the removal of fluoride in the drinking water. This method is quite wide spread around the world. You are likely to have already used it before. 

  • Vacuum systems 

You would also find it a great choice for vacuum systems use too. Activated alumina would generally be vital a charge material to prevent the oil from the rotary vane pumps from easily back streaming to the vacuum systems. So, there will always be many ways to use the activated alumina in different industries. 

How is Activated Alumina Produced?

activated alumina production

Activated alumina would go through different stages before you can get the final product that you would use different uses. It is worth noting that the activated alumina would start as aluminum hydroxide. This is the material that would be obtained through various chemical reactions. 

  • Activated alumina calcination 

To get here, the aluminum hydroxide would be thermally treated in a rotary kiln through the process of calcination. This process will involve dehydration of the aluminum hydroxide to remove enough moisture so that you end up with alumina. It is also called aluminum oxide too. When the moisture is removed, the hydrogen molecules are also removed. 

Now, the activation phase is what follows next. Here, the alumina structure will become even more porous so that it can be used in different applications. The process is done based on certain important parameters including the temperature profile and residence time. These two features will be vital for controlling the properties of the activated alumina in the end. 

Here we can also customize it even more depending on what the client. 

  • Activated alumina agglomeration 

This step would be followed depending on what a client. This process is good for making the activated alumina good as an adsorbent or being used in catalysts. 

We recommend this process for those clients to highly customize their activated alumina to be good for their specific applications. Some of the things that can be customized during this process include bulk density, crush strength, flowability, potential dust generation, particle size distribution etc. 

As much as there will be many other ways of making activated alumina, the two mentioned above will be the best ones. That is what the SWT uses and so far, our clients are happy with the products we make. 

How is Activated Alumina Tested?

Testing of activated alumina is quite important. This would then determine where best to use it or when it is time to regenerated the activated alumina. You are required to test the activated alumina more often or follow the testing methods that SWT recommends when you buy activated alumina. 

One of the best methods to test the activated alumina would be using pilot scale kilns and batch kilns. This is also recommended especially for the activated alumina made with the use of agglomerate since you need to be sure it is still working as you wanted in the first place. 

SWT has one of the best testing facilities where the agglomeration and thermal testing. The activated alumina would be processed in a continuous loop to see if it can live up to the various characteristics. In case the activated alumina does not meet our standards, then you may have to replace it. It is possible at times because you have been using it for a while now. Yes, even the activated alumina will have a shelf life. 

Is Activated Alumina a Good Drying Agent?

activated alumina drying agent

One of the reasons activated alumina is common as a desiccant is because of adsorption capabilities. The adsorption process is when the water or moisture in the stream of air is removed with the help of a desiccant such as activated alumina. 

Well, the working of activated alumina is quite simple. You can think of it as a sponge in a bucket of water. It will simply absorb the water and leave the other elements. Likewise, activated alumina will adsorb the moisture in the air and leave you with a dry stream of air. 

  • The process

It is possible you have not seen this process in operation. What you should know is that the process is generally easy. 

First, the compressed air will be pushed towards the activated alumina bed. When the air is pushed through the activated alumina, you will find the emerging air will be free from the moisture. Keep in mind that the activated alumina would also have an adsorption capacity. When it gets to that point, the alumina is not longer effective at the removal of the moisture in the air. You will then have to regenerate the activate alumina. This includes the raising of the temperature to close to 200 degrees C. Once regeneration is complete, then you can go back to using it once again to dry the air stream. 

Depending on the system setup, sometimes you will find that the activated alumina would be regenerated automatically. If that is something that you desire, talk to SWT for more details on handling such a process. 

We always create personalized activated alumina systems so that they work great for a client. You will be working with out our top engineers to get the best system in the end always. 

Activated Alumina vs. Molecular Sieves vs. Silica Gel. Which One to Pick?  


The activated alumina will be a preferred desiccant in different processes. This has made more people consider using it more often for various processes. This does not mean that it is the only desiccant in the market that you can use. You can get options such as silica gel and molecular sieves. 

Silica gel might be one desiccant you come across almost every day. It also works like activated alumina through the process of adsorption. Here, the water in the air stream would be held in the tiny passage when the air is passing through silica gel. Of course, this method is also reversible. Here, you would also have to heat silica gel up to a temperature of 180 degrees F. It is still the process of regenerating silica gel desiccant. 

You are advised not to regenerate silica gel at high temperatures. This is because it makes the silica gel to breakdown and lose its adsorption capabilities. 

There is also the use of molecular sieves. The molecular sieves come with uniform crystalline structures. These structures will have similar pore sizes. The pore sizes are small enough to end up adsorbing the water molecules and let air pass through. It is possible to get different molecular sieves in the market. It will depend on where you want to use them. That is not the same with silica gel. Since it has a capacity of 20 to 30% by its weight, it should be a great choice too as a desiccant. However, it will need a higher temperature to regenerate. 

So, the one that you choose to pick can be based on application and preference too. Some applications can do better with activated alumina. Simply let us know why you need a desiccant and we can advise further on which one to use. 

What Makes Activated Alumina Vital for Water Treatment?

activated alumina water treatment

Activated alumina has always played an important role in water treatment. This is because we get water from different sources such as underground aquifers, lakes, streams, and more. Each one might have some contaminants and minerals that need to be removed before it is safe for drinking. 

This raw is mostly pumped to the treatment centers. The first step will be the removal of particles and sediments. This is done with the help of coagulant chemicals. The coagulants are like magnets which will help in pulling these particles from the water and make them to clot together. 

Once these particles are removed, they would then be pumped out of the water. Or you can find them forced to rise to the top of the tank and then removed with ease. 

Next is the filtration method. The filtration process to remove any of the residue particles that might still be in the water. You would find that the filtration media will include sand, gravel, carbon, and activated alumina. The activated alumina layer will be used in removing specific toxins including arsenic and fluoride. With the toxins removed, your water is edging closer to being safe for drinking. 

The final step in the water treatment process is to further disinfect the water so as to remove the tiny microorganisms which may make a person to easily become ill. You may find that chlorine would be used in this part to remove the viruses and bacteria in the water. 

If you need activated alumina for your water treatment process, then consider using this type of method. 

What are the Safety Tips for Handling Activated Alumina?


It is possible that from time to time you may have to handle activated alumina yourself. This calls for you to understand more about the safety revolving around activated alumina. 

We discuss some of the things you should be doing below. 

  • In case of inhaling the dust from the activated alumina, try to get as much fresh air as possible. Most of the time you will be okay. You could as well as call a physician in care the symptoms persist. 
  • Skin contact with activated alumina is not a big deal. You simply have to wash off with water and soap. Some may get irritation in case of a sensitive skin. You can always opt for medical attention when this happens. 
  • Activated alumina itself is not flammable, but in case there is a fire around it, use the appropriate firefighting equipment to leave you with a good media ready for use again
  • How about storing this activated alumina? It is important that you use the appropriate exhaust ventilation in case there is dust in the storage area. You are advised not to breath the dust from activated alumina. When storing activated alumina, you are advised to keep the balls in an airtight container. This is because it may adsorb moisture. Also, this would keep it from forming dust. This is definitely good news for most people. 

What is the Capacity of Activated Alumina?

activated alumina capacity

The capacity of your activated alumina would be based on the flow rate and its overall contaminant removal capacity. The flow rate is mostly depended on the surface area of the activated alumina, its pore size, and the water pressure that is available. When the flow are increases, then the flow rate will also increase. This is assuming that other factors in play will remain the same. The flow rate will mostly decrease when the activated alumina pore size decreases. 

Let us say you want to use activated alumina for the treatment of household water. The pressure of the water in a household should be good enough to drive the water through the activated alumina bed. For most homes, they can expect to get one gallon of water per minute that would also be treated. 

In case you are using point-of-entry devices, you will find them producing up to 10 gallons each minute. In case you need more capacity, get yourself more capacity activated alumina from SWT. So long as you are using the activated alumina correctly, expect to get the best quality water. It is the same thing when you want to dry an air stream. 

How Does Activated Alumina Compare to Activated Carbon in Performance?


You already know more about activated alumina; we now want to look at activated carbon. This is another important adsorbent for you to consider using. Activated carbon has always been known to help in removing many odors, toxins, irritants, and also corrosive gases

Activated carbon will remain a versatile adsorbent considering how often it is used in various applications. It is used in the control of different molecules that pollute our air. One of the important features of the activated carbon is that it has a broad-spectrum adsorptive capacity. As such, it would be a great material to adsorb different molecules. 

Activated carbon would often be used in the place where you are not sure of what you are supposed to be adsorbing. This is because the material would do a good job of adsorbing very many molecules. 

The activated carbon would also be available in different sizes, qualities, and sizes. As much as we make activated alumina, you will also find that we make activated carbon too. We will also recommend where you can use the activated alumina and activated carbon. There are some mechanisms where the activated carbon would be preferred and vice versa. 



Activated alumina will always be a popular choice as a desiccant. Even though there are many desiccants and adsorbents in the market, you want to use activated alumina too. It is good at removal of contaminants in water treatment, can work as a drying agent for air, and so much more. Because of such performance, you would be comfortable in investing in such a product. If you want such a product, let SWT help you get the best quality. 


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