English
Español
日本語
Product Introduction
Granular Activated Carbon (GAC) filter media represents the industry standard for high-capacity gas-phase adsorption. Unlike thin impregnated fabrics, granular media provides a "deep bed" filtration experience, where air must navigate through a dense labyrinth of carbon particles. This physical depth is crucial for achieving high "dwell time," allowing even the most elusive volatile organic compounds (VOCs) to be captured within the carbon's vast internal pore structure. At Nantong Lyusen, we source our raw materials from premium coconut shells and high-grade bituminous coal, subjected to precise steam activation at temperatures exceeding 900°C. This process creates a carbon matrix with an internal surface area that can reach up to 1,200 square meters per gram—meaning a single handful of our granular media has the equivalent surface area of several football fields. This massive surface area is what allows our media to handle high-concentration industrial emissions and heavy odor loads that would quickly saturate lesser filter types.
Our manufacturing philosophy for granular media focuses on "Pore Size Distribution." We understand that different pollutants require different pore sizes—micropores for small gas molecules like ozone, and mesopores for larger organic vapors like benzene or toluene. By strictly controlling the activation time and chemical environment, we produce granular media that is tailor-made for specific industrial challenges. Furthermore, our GAC is subjected to multiple de-dusting and sifting cycles. One of the biggest complaints in the filter industry is "carbon fines" (dust) clogging downstream HEPA filters or contaminating cleanrooms. Lyusen’s granular media is specifically engineered for high mechanical hardness, ensuring that the grains do not crumble under the pressure of high-velocity airflow or the weight of a deep-bed installation. This stability ensures a predictable and consistent pressure drop over the entire lifespan of the filter, providing engineers with a reliable component for their air handling designs. When you choose Lyusen granular media, you are choosing a product backed by rigorous laboratory testing and decades of manufacturing expertise in the international environmental protection sector.
Detailed Technical Specifications
The performance of Granular Activated Carbon is not a matter of guesswork; it is a science of measurable metrics. To assist our global engineering partners, we provide a comprehensive data suite for every batch. The most critical metric for gas adsorption is the Iodine Value, which indicates the micropore content and the overall activity level of the carbon. We also provide CTC (Carbon Tetrachloride) activity ratings, which are the industry benchmark for organic vapor adsorption capacity. For applications involving high-velocity air, the Hardness Number is vital, as it indicates the material's resistance to attrition and dust generation. Below is a detailed technical matrix comparing our Coconut Shell, Bituminous Coal, and Wood-based granular options. These specifications are maintained through a strict ISO 9001-certified quality control process, ensuring that the media you receive in London or Los Angeles is identical in performance to the samples tested in our Nantong facility.
| Parameter | Coconut Shell GAC | Bituminous Coal GAC | High-Activity Wood GAC |
|---|---|---|---|
| Iodine Number (mg/g) | 1000 - 1150 | 900 - 1050 | 1100 - 1250 |
| CTC Activity (%) | 55 - 70 | 50 - 65 | 60 - 80 |
| Apparent Density (g/L) | 480 - 550 | 450 - 520 | 300 - 400 |
| Ball-Pan Hardness (%) | 98.0 Min | 95.0 Min | 90.0 Min |
| Moisture Content (%) | < 5.0 | < 3.0 | < 8.0 |
| Ash Content (%) | < 3.0 | < 12.0 | < 5.0 |
| Standard Mesh Sizes | 4x8, 6x12, 8x30 | 4x8, 4x10, 12x40 | Standard Granular |
In addition to these chemical properties, we offer custom Particle Size Distribution (PSD). For deep-bed scrubbers where low air resistance is paramount, we recommend larger 4x8 mesh granules. For compact filter modules requiring maximum contact efficiency, a finer 12x40 mesh is often more appropriate. We also provide "Pre-washed" grades for applications where the initial dust release must be zero. Every shipment is accompanied by a batch-specific COA (Certificate of Analysis), and we keep retain samples for three years to ensure full traceability. Our technical team is also available to perform "Retentivity Tests" using your specific target gas to determine the exact breakthrough curves for your system design, ensuring that you select the most cost-effective grade of carbon for your specific air purification requirements.
Primary Industrial Applications
Granular Activated Carbon is the backbone of the Industrial Air Scrubbing industry. In heavy manufacturing sectors, such as petroleum refining, chemical synthesis, and pharmaceutical production, massive quantities of VOCs are generated every hour. Our GAC is used in large-scale "Deep Bed Adsorbers" to capture these emissions before they reach the atmosphere, ensuring compliance with EPA, REACH, and local environmental standards. Because of its high capacity, GAC is the only economically viable solution for handling the massive "mass loading" required in these heavy industrial settings. It is also the primary media used in Solvent Recovery Systems, where expensive chemicals like toluene or ethyl acetate are captured from the air and then desorbed and reused, turning an environmental cost into a manufacturing saving.
In the Commercial Building and Infrastructure sector, GAC is essential for "Make-up Air" units in airports, hospitals, and high-rise offices located in polluted urban centers. It effectively scrubs out sulfur dioxide (SO2), nitrogen oxides (NOx), and the pungent smells of jet fuel or diesel exhaust. For Waste Management Facilities, specifically landfill gas extraction and sewage treatment, our coal-based GAC is used to neutralize hydrogen sulfide and siloxanes, protecting the gas engines used for power generation from corrosion and wear. The durability of our granules makes them ideal for these high-flow, high-pressure environments where the media must withstand vibration and constant airflow without breaking down.
Furthermore, our granular media is widely utilized in Precision OEM Equipment. It is the core component in high-end lab fume hoods, high-vacuum pump exhaust filters, and specialized enclosures for the protection of fine art and historical archives. In the food and beverage industry, it is used to remove chlorine and organic odors from the air in bottling and fermentation rooms to prevent flavor contamination. Even in smaller-scale applications, such as home aquarium air pumps and high-end air purifiers, the use of "real" granular carbon—as opposed to simple carbon-dusted foam—is seen as a mark of a premium product. By offering a variety of mesh sizes and base materials, Nantong Lyusen ensures that whether you are filtering a small electronics cabinet or a massive city-wide sewage plant, you have the right granular media to do the job effectively.
Core Technical Advantages
The primary advantage of Lyusen’s Granular Carbon Filter Media is its High Mass Loading Capacity. In the world of adsorption, "capacity" is king. While thin carbon fabrics or foams are excellent for light odors, they lack the physical mass to handle heavy chemical concentrations. A granular bed provides a reservoir of adsorption sites that can last months or even years without replacement. This makes it the most cost-effective choice for industrial users who want to minimize maintenance downtime. Our coconut-shell varieties, in particular, offer a superior micropore structure that is unrivaled for capturing small-molecule gases, providing a level of air purity that is often required in semiconductor manufacturing and high-level medical research.
Another critical advantage is the Thermal and Chemical Regenerability. Unlike disposable synthetic filters, granular activated carbon can often be "reactivated" or "regenerated." By subjecting the spent carbon to specific thermal or chemical processes, the captured pollutants can be driven off and the pore structure reopened. This creates a "circular economy" model for large-scale users, significantly reducing the environmental footprint and long-term waste disposal costs. Even for users who do not regenerate their carbon, the sheer longevity of our granular media means that the "Total Cost of Ownership" (TCO) is much lower than frequently replaced disposable filters. The mechanical strength of our granules also means that the bed does not "settle" over time, preventing the formation of bypass channels where unfiltered air could escape—a common problem with lower-quality, softer carbon products.
Finally, our GAC offers Versatile Customization via Impregnation. Because granular carbon is a rigid, porous carrier, it is the perfect substrate for chemical enhancements. We can take our standard high-activity granular media and impregnate it with potassium permanganate for formaldehyde removal, or phosphoric acid for ammonia capture. This allows engineers to use the same filter housing and hardware while simply swapping the type of granular media to handle different chemical threats. This modularity is a massive advantage for international contractors who design systems for a variety of global markets with different environmental challenges. By partnering with Nantong Lyusen, you gain access to a vertically integrated manufacturer that controls everything from raw material selection to final chemical impregnation, ensuring that your granular carbon is a high-performance precision tool, not just a commodity.
Logistics, Payment & Global Shipping
Nantong Lyusen has optimized the global distribution of granular carbon to ensure that our clients receive a high-quality product in a ready-to-use condition. We offer a variety of flexible payment structures to suit different corporate procurement policies. For large-scale industrial orders, we primarily utilize T/T (30% deposit, 70% against B/L) or Irrevocable Letters of Credit (L/C) at Sight. We also support D/P (Documents against Payment) for long-standing clients. Our finance team is well-versed in the documentation required for international trade, providing accurate proforma invoices, packing lists, and certificates of origin (Form E, Form F, or CO) to ensure that you can take advantage of any applicable free trade agreements and minimize import duties.
Shipping granular carbon requires specialized logistics to protect the media's activity and physical integrity. Activated carbon is "active" from the moment it leaves the kiln; if it is exposed to humid air or ambient odors during shipping, its capacity will be depleted before it reaches your facility. Therefore, we utilize Triple-Sealed Moisture-Proof Packaging. For bulk orders, we offer 500kg or 1000kg "Super Sacks" with internal PE liners and heavy-duty lifting loops. For smaller requirements or easier handling, we provide 25kg multi-wall paper or woven PP bags, palletized and shrink-wrapped for maximum stability during ocean transit. Our factory is strategically located near the Port of Shanghai, allowing for rapid dispatch and competitive shipping rates to all major global ports. We handle all "Dangerous Goods" classification and MSDS documentation required for carbon products (even though most of our steam-activated grades are classified as non-hazardous for transport), ensuring a smooth and delay-free customs experience. From single pallets via air freight to full 20ft/40ft containers, our logistics department provides real-time tracking and dedicated support until the material is safely in your hands.
- Q: Why should I choose Coconut Shell carbon over Coal-based carbon for my air filter?
- A: Coconut shell carbon has a higher density of micropores, which are the small pores needed to capture small gas molecules like odors and VOCs. It is also naturally cleaner, with lower ash content and higher hardness. Coal-based carbon, however, has a more diverse pore structure (including meso and macro pores) which can be better for a "cocktail" of many different types of gases, and it is generally more cost-effective for very large-scale industrial scrubbing.
- Q: What is "Pressure Drop" and why does it matter for granular carbon?
- A: Pressure drop is the resistance the air faces as it moves through the carbon bed. If the carbon is too small or the bed is too deep, the pressure drop will be high, requiring a more powerful (and expensive) fan. Choosing the correct mesh size (like 4x8 vs 8x30) is key to balancing filtration efficiency with energy costs. Our technical team can help you calculate the expected pressure drop for your specific air velocity and bed depth.
- Q: How long will one ton of granular carbon last in my industrial exhaust system?
- A: This depends entirely on the concentration of the pollutants and the volume of air. One ton of high-quality GAC can typically hold between 200kg to 400kg of organic vapors before it is saturated. If you provide us with your air flow rate (m³/h) and the concentration of the target gas (ppm or mg/m³), our engineers can calculate a "Theoretical Breakthrough Time" to give you a very accurate estimate of your maintenance schedule.
- Q: Can the granular media be customized with chemical impregnations?
- A: Absolutely. While standard GAC works via physical adsorption, we can impregnate the granules with chemicals like KOH, NaOH, or H3PO4 to add a "Chemisorption" layer. This allows the granules to target specific toxic gases like Ammonia, Hydrogen Sulfide, or Acidic vapors that standard carbon cannot capture efficiently. This is very common in laboratory and chemical plant applications.
