Information about Sintered Activated Carbon Filters That All You Want to Know

In the water treatment industry, words like sintered activated carbon cartridge, compressed activated carbon filter, extruded activated carbon cartridge, CTO carbon cartridge and honeycomb carbon filter are often mentioned or used, but many people do not really understand them.HUATAN FILTERwill introduce you in detail about the difference between these products today.

NSF CTO Activated Carbon Block Carbon Charcoal Water Filter CTO Filter Cartridge
NSF CTO Activated Carbon Block Carbon Charcoal Water Filter CTO Filter Cartridge

Sintered activated carbon filter, compressed activated carbon filter, extruded activated carbon filter are named after their production process characteristics, and CTO carbon filter and net carbon filter are named after the appearance of their final shape. Although their appearance is the same, their internal quality and production technology are greatly different.

Sintered activated carbon block is made by mixing activated carbon powder material and polymer hot-melt pore material, and then pouring it into a special mold and sintering at a high temperature of 200-300 ° C. Because this polymer bonding material can form open micropores in the sintering process, it maintains the characteristics of large specific surface area of activated carbon powder, excellent pore formation, better filtering effect, and more fully with liquid contact after mixing with activated carbon;Due to its complex processing technology, the production capacity of sintered activated carbon filter is also limited.

Compressed activated carbon filter is made by mixing activated carbon powder material with inorganic liquid binder, filling it into a special mold, compressing and molding with a press at high pressure, and drying after exiting the mold;This process has high content of activated carbon and good filtering effect. However, because it is only adhered by using inorganic materials and then high-pressure molding without being sintered at high temperature during production.This makes it difficult to control the pore diameter of the compressed activated carbon filter and the filter cartridge pressure drop becomes large, which affects the performance of the filter cartridge.

Extruded activated carbon filter is produced by mixing activated carbon and common hot-melt resin and putting it into a screw extruder for heating and extrusion molding. In this production process, the appearance of the activated carbon is melted and wrapped by the hot-melt resin after high temperature. The hot-melt resin blocks the pores of the activated carbon, causing the entire filter cartridge to lose its adsorption effect. The production cost of extruded activated carbon block produced by this process is low, but its output is very high. This filter cartridge is just a decoration during use without any filtering or adsorption effect.

CTO carbon filter is the abbreviation of chloride, taste, and odor. Net carbon block filter extruded activated carbon filter , sintered activated carbon filter,and compressed activated carbon filter, in a broad sense, they are rod-shaped forms of activated carbon block, which can be collectively referred to as shaped activated carbon cartridge.

At present, the use of shapedactivated carbon filter cartridges in the water treatment industry is becoming more and more important.

The main reasons are: Firstly, the formed activated carbon filter integrates the functions of adsorption and interception. It not only has the adsorption of activated carbon, but also has dense voids, which can effectively intercept large particles of impurities and effectively reduce the physical pollution of water quality;

Secondly, the pore size of the shaped activated carbon filter cartridge can be adjusted arbitrarily, and the smallest pore size can reach 0.2 micrometers, which is better than the so-called large-flux hollow ultrafiltration membranes on the market.

Thirdly,The black water that flows out of the shaped activated carbon during water treatment is less than the granular activated carbon. After the black powder in the carbon block is washed out for the first time, the black water will not appear in the future, and it will not be caused by the flushing of the water like the granular activated carbon. It will not cause decontamination and secondary pollution when washed by water stream like granular activated carbon.

Finally, the activated carbon powder below 80 mesh has a large specific surface area after processing, so that the performance of activated carbon can be fully exerted.

The sintered activated carbon block is a shaped activated carbon with the above functions. Because many people confuse sintered activated carbon block with extruded activated carbon block, many active carbon block manufacturers have given their sintered activated carbon block products a unique name in order to avoid confusion. For example, HUATAN FILTER called sintered activated carbon as diamond carbon block. The 3M company called this activated carbon filter a black magic activated carbon filter.

Due to its special molding process, sintered activated carbon block technology can be developed into a compound filter cartridge with activated carbon as the main body mixed with a variety of ultra-fine filter powders.

Because the shape of the sintered activated carbon filter is very similar to the shape of the low-end extruded activated carbon filter, we share 2 main methods of identification for you.The first is the hydrophilicity test. The sintered activated carbon block has good hydrophilicity, so you can try to drop a drop of water on the filter cartridge, and the water droplets can immediately penetrate into the carbon filter.The second method is that the water flowing out of the sintered activated carbon filter cartridge when it is first passed is hot, and this phenomenon does not occur when the activated carbon water filter is squeezed.

Sintered activated carbon filter has a relatively low production capacity due to the special sintering process, and it requires a large investment in mold costs and high-quality materials. Its product cost is higher than ordinary carbon filter cartridges, but it has superior product performance. Experienced companies in the water treatment industry understand the benefits of this high-end product. With the constant standardization of the water treatment industry, the inferior carbon filter materials that have been in the market for price competition must be abandoned, and the sintered activated carbon filter cartridge will become an essential accessory for the water purification industry.

The Role of Activated Carbon Block Cartridge in The Water Filter

Activated carbon is a black powder or block, granular, honeycomb amorphous carbon or a well-arranged crystalline carbon.

Activated carbon blcok is a very good adsorbent material which uses charcoal, bamboo charcoal, various shells and high-quality coal as raw materials,and is processed by a series of  by physical and chemical methods such as crushing, sieving, catalyst activation, rinsing, drying and screening.It has the dual characteristics of physical adsorption and chemical adsorption, and can selectively adsorb harmful substances in tap water to achieve decolorization, odor removal and filtration of chemical pollution and volatile organic substances.

China custom activated carbon block filter cartridge | water purifier manufacturer &supplier-HUATAN

What is the role of activated carbon block in the field of water filtration?

Activated carbon block is widely used in industrial production and family life especially in the field of water purification due to its strong adsorption performance.In the case of drinking water applications, once the drinking water is contaminated, it is easy to produce odor.First of all, it will make people feel very uncomfortable in the senses, and secondly it may also cause harm to human health.One of the important performance of activated carbon block is that it can adsorb and filter the pigments and odors in the water, such as the rust smell produced by rust in the water, the yellow rust water color, the odor generated by the sulfide water, the earthy smell produced by the muddy water, and the mold and smashing smell produced by the animal and plant corpses.

Activated carbon cartridge has a well-developed pore structure and a large specific surface area. It has good adsorption capacity for inorganic or organic substances and colloidal particles in gases and solutions. The working principle of the activated carbon filter is to use the porous solid surface to adsorb and remove organic or toxic substances in the water to achieve the effect of purifying water.

The adsorption of organic matter by activated carbon cartridge is affected by its pore size distribution and organic matter characteristics, which is mainly affected by the polarity and molecular size of organic matter. For organic matter of the same size, the greater the solubility and the stronger the hydrophilicity, the worse the adsorption of activated carbon on it. Conversely, it has strong adsorption capacity for organic substances such as benzene compounds with low solubility, poor hydrophilicity and weak polarity.

What are the classifications of activated carbon filter cartridges for water purifiers?

UDF granular activated carbon filter: It can effectively remove odor in water, such as chlorine (bleaching powder), improve the taste of water, and effectively avoid the production of carcinogens such as chlorine and chloroform.

CTO activated carbon filter: It can deeply absorb harmful substances such as color, odor and residual chlorine in water and use micropores of charcoal activated carbon to retain fine particles and colloidal suspension.

Post-activated activated carbon: It can effectively remove the odor of water, inhibit the growth of bacteria, improve the taste of pure water, and increase the energy of water.

In summary, the activated carbon filter has an excellent effect on water purification. It not only removes the odor and odor, but also improves the purity of the water, and has a high removal rate for various impurities in the water,such as chlorine, phenol, cyanide, pesticides and other harmful substances.Therefore, activated carbon blcoks can be widely used in various types of large, medium and small water purification equipment.

HUATAN FIlTER is a professional carbon block water filter manufacturer and supplier in China.If you have any enquiries or custom needs about carbon cartridge or water filter,please feel free to contact us via