PACCO INTERNATIONAL (PACCO International) offers a high quality standard virgin coconut activated carbon product line for a variety of liquid and vapor phase applications. Some of our products and their applications can be viewed by clicking on the “Application Chart” button on the left.

Consistent and predictable performance as well as product cleanliness and resistance to abrasion are important in most applications where PACCO carbons are employed. These product characteristics are achieved at PACCO through careful control of raw material quality, activation conditions, and particle size.

Beginning in 1999, heavy investments were made in upgrading the unit-manufacturing operations to further enhance the above areas of quality. Additional laboratory equipment and process controls are in place that assures the manufacture of products with consistent product characteristics.

In most activated carbon applications, physical adsorption (performance) can not be predicted by the manufacturer’s published product specifications. In an application where activated carbon is being considered as a possible solution, manufacturer’s product specification information may appear to suggest similar performance. Various products, that appear equal in the specifications, may not perform the same.

There can be many reasons why products with the same specifications do not display equal physical adsorption. Some of the reasons are:

· Different raw materials
· Raw material condition and size
· Activation feed rate
· Activation temperature and pressure
· Activation oxygen content
· Finished product blending

Other than actual laboratory or field trials, one of the best predictors of performance is the characterization of the products’ adsorption potential energy. This characterization may also be used to assure consistent product quality and performance. A differential adsorption potential energy characteristic curve defines the energy distribution and percentage of total pores within an energy level. Two carbons with the same potential energy curves and the same total number of adsorption sites will have equal physical adsorption potential.

The major factor contributing to product consistency and predictable application performance is control of the manufacturing process. To achieve the desired result the characteristics of every activated carbon product lot manufactured should fall within the differential adsorption potential energy curves of the manufacturer’s standard activation series.

PACCO produces a standard family of products ranging from dense low activity to less dense high activity products suitable for many vapor, liquid phase and catalyst support applications. The differential adsorption potential energy curves of PACCO’s standard coconut carbon activation series are shown below.


Development of raw material selection and handling procedures coupled with tight control of the activation process assures that PACCO’s standard product line will fall within the limits of the associated adsorption potential energy curves. This is the true measure of consistent quality and performance that our customers expect and demand.

The activated carbon adsorption potential energy required to remove, or reduce, a target adsorbate (molecule) from a vapor or liquid phase application can be calculated from the following formulas:


If the adsorption potential energy distribution and the number of adsorption pore sites of an activated carbon are known, adsorption isotherms can be accurately computer generated.

On PACCO’s web page, visitors have the capability to generate vapor and liquid phase isotherms for the PACCO product line. The adsorbate file currently contains 300 compounds (not all available on the web site) from which an isotherm can be generated. To generate an isotherm click on the “Isotherms” button on the left and follow the instructions. If the compound of interest is not included in adsorbate file, please contact PACCO by clicking on the “Contact Us” button on the left and explain the problem. Dynamic liquid and vapor phase performance models are available. Please contact PACCO with your application details.

Having an isotherm and knowing the adsorption potential energy distribution of an activated carbon does not guarantee successful application performance. While the energy distribution curve is the “DNA” of physical adsorption for that product, other factors may influence product performance in a given application.

· Ash constituents
· Mesh size
· Contact time
· Competitive adsorption
In some applications the carbon ash content may alter or poison the intended results. While coconut activated carbon typically has a very low ash content, its’ ash constituency may be problematic for some applications. This potential is limited by PACCO in the use a product activation process that does not utilize fossil fuels, and thus, does not impart any foreign by-products from the combustion process into the product. In addition, water and acid washed products are offered to further reduce or eliminate the soluble ash content to prevent poisoning due to leaching.

For specialty applications where physical adsorption alone will not achieve the desired results, catalytically enhanced or impregnated activated carbons may provide the solution. PACCO has the capability to enhance activated carbon performance with a variety of impregnates.

PACCO’s research and development department is always looking for methods to expand and improve our product line and manufacturing procedures. PACCO is anxious to conduct joint developmental projects with our customers. Please contact PACCO to explore the possibilities, or to obtain assistance in the selection of the proper activated carbon for an application.

 

 
PACCO International
One Williamsburg Place - Suite 110
Warrendale,PA 15086
phone: 724-940-1752
fax: 724-940-1753
e-mail: admin@pacco-intl.com