Activated Carbon Fiber vs. Traditional Activated Carbon: Which Water Filter Materials Are Better for Water Filtration?
Yesterday, a friend asked me about the activated carbon fiber used in Chengrongtimes’ mineral-water-style water purifier: What is the difference between activated carbon fiber and traditional activated carbon?
I told him that activated carbon fiber has a higher cost, while traditional activated carbon offers better cost performance. That is why most water purifiers on the market use activated carbon rather than carbon fiber.
So why does Chengrongtimes choose activated carbon fiber, even though it costs more?
Because Chengrongtimes’ mineral-water-style water purifier is designed to benchmark against, and even surpass, leading international brands in manufacturing quality, product functionality, and structural design. We are willing to invest more in high-quality materials for water filtration because we do not want to disappoint the trust of our customers.
Although Chengrongtimes is still not a well-known brand, the road may be long, but if we keep moving forward, we will eventually reach our destination. As long as we can provide water purifiers with TOP 1% quality in the industry, there will come a day when more customers recognize Chengrongtimes.
The same is true of the Chengrong Ultrafiltration Factory. At the beginning, it was just a small hardware-processing workshop with fewer than 10 employees. After 18 years, thanks to high-quality products and services, we have become TOP 3 in the stainless steel pipeline ultrafiltration industry and have achieved widespread recognition within the industry.
Activated Carbon Fiber vs. Traditional Activated Carbon: What Are the Advantages?
Besides being significantly more expensive than traditional activated carbon, what advantages does activated carbon fiber have in terms of performance?
Let us take a detailed look.
Both activated carbon fiber and traditional activated carbon are porous adsorption materials. Their core functions are to adsorb odors, color, and residual chlorine from water.
However, the differences between these two water filter materials are significant in terms of structural form, adsorption performance, and application scenarios.
Different Raw Materials and Manufacturing Processes
Traditional activated carbon is mainly made from coconut shells, coal, or wood chips. Its manufacturing process is relatively simple.
Activated carbon fiber, on the other hand, is made from organic fibers. Not only are its raw materials more expensive, but its spinning process is also more complex.
This is one of the reasons why activated carbon fiber has a higher cost among materials for a water filter.
Different Pore Structures
Traditional activated carbon is generally available in granular, cylindrical, or powdered forms. It mainly consists of carbon particles stacked together, with pores distributed in a relatively disordered structure.
Activated carbon fiber, as its name suggests, has a fibrous structure. Its pores are directly exposed on the surface of the fibers and are distributed more uniformly and densely.
Traditional activated carbon contains micropores, mesopores, and macropores simultaneously, and its pore sizes are relatively uneven. Activated carbon fiber, by comparison, is mainly characterized by micropores with more uniform pore sizes.
The adsorption capability of these water filter materials is closely related to the number of micropores they contain.
Activated Carbon Fiber Has a Much Higher Specific Surface Area
When comparing specific surface area, activated carbon fiber can reach dozens or even hundreds of times the specific surface area of traditional activated carbon.
The activated carbon fiber used in Chengrongtimes’ mineral-water-style water purifier has a specific surface area 400 times that of ordinary granular carbon.
This large specific surface area is one of the key reasons why activated carbon fiber is considered a high-performance material among materials for water filtration.
1. Activated Carbon Fiber Has a Faster Adsorption Speed
Activated carbon fiber adsorbs contaminants faster than traditional activated carbon.
Traditional activated carbon is similar to a pile of “carbon particles” placed together. Not only do the pore sizes vary, but their distribution is also relatively disordered.
Odors, residual chlorine, and other impurities in water need to gradually penetrate from the surface of the carbon particles into the internal pores. As a result, the removal of odors and residual chlorine is relatively slow, requiring at least several seconds, and in some cases even tens of seconds.
Activated carbon fiber, however, has an adsorption speed 10–100 times faster than ordinary activated carbon.
Because activated carbon fiber has a larger specific surface area and its adsorption sites are exposed on the surface, it is similar to a “carbon-made nonwoven fabric.”
When water passes through it, odors, residual chlorine, and other impurities in the water can be captured by the adsorption micropores on the fiber within 1 second.
This makes activated carbon fiber an attractive choice among high-performance water filter materials when rapid adsorption is required.
2. Activated Carbon Fiber Has a Higher Micropore Ratio and Higher Adsorption Capacity
Traditional activated carbon has a relatively low proportion of micropores and limited adsorption capacity, while the proportion of micropores in activated carbon fiber can reach more than 80%, and its saturated adsorption capacity is 30%–50% higher than that of activated carbon.
Because traditional activated carbon contains a relatively high proportion of macropores, it can primarily adsorb noticeable chlorine odors and sediment odors.
For trace contaminants such as pesticide residues, heavy metals such as lead and mercury, and persistent chemicals such as PFAS, traditional activated carbon has relatively limited adsorption performance.
Activated carbon fiber, on the other hand, can not only rapidly remove residual chlorine and odors, but can also adsorb trace organic substances, heavy metals, bacterial metabolites, and other contaminants.
This makes activated carbon fiber one of the more advanced materials for water filtration used in high-performance water purification applications.
For a water purifier designed for high-quality drinking water, choosing the right water filter materials is therefore extremely important.
3. Activated Carbon Can Release Carbon Dust, While Activated Carbon Fiber Has Better Stability
Traditional activated carbon can generate carbon dust, has a shorter service life, while activated carbon fiber has good flexibility, does not generate carbon dust, and has a longer service life.
Activated carbon particles can generate dust through friction. During long-term use, this may cause the purified water to contain slight black particles.
At the same time, the pores of activated carbon can become saturated relatively easily, requiring more frequent filter replacement and increasing maintenance costs.
Activated carbon fiber has a stable fibrous structure and uniformly distributed gaps. It has no risk of carbon powder shedding, provides low water-flow resistance, and allows water to pass through quickly.
It also has a large adsorption capacity and strong resistance to saturation.
As a result, its service life can be 1–2 times longer than that of traditional activated carbon.
These characteristics make activated carbon fiber an important option when selecting materials for a water filter, especially when long service life, stable water flow, and adsorption performance are important considerations.
Why Does Chengrongtimes Use More Expensive Activated Carbon Fiber Instead of More Cost-Effective Activated Carbon?
So, why does Chengrongtimes’ mineral-water-style water purifier use activated carbon fiber, which has a higher cost, instead of traditional activated carbon, which offers better cost performance?
Because from the moment Chengrongtimes was established, I told myself:
If we finally have the opportunity to build our own brand, we must never compromise on quality.
Even if customers feel a little pain when paying for a Chengrongtimes product, I want to make sure that every subsequent use is enjoyable.
I do not want the opposite situation, where customers feel comfortable only when they pay, but are unhappy every time they use the product afterward.
This is why we are willing to invest more in high-quality materials for water filtration, even when less expensive water filter materials are available.
For us, the selection of materials for a water filter is not simply a question of cost. It is a question of product quality, functionality, long-term performance, and customer experience.
A kitchen water purifier that can remove bacteria, viruses, residual chlorine, and other particulate impurities from water, while also retaining minerals and trace elements in the water, is extremely difficult to find on the market besides Chengrongtimes’ mineral-water-style water purifier.
That is why we continue to choose high-performance water filter materials rather than simply choosing the lowest-cost materials.
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