What Are The Determinants of The Nitrogen Production Effect of Carbon Molecular Sieves?

A/ Microporous Structure and Surface Properties

1. Pore size distribution: The pore size distribution of carbon molecular sieves needs to match the size of gas molecules such as nitrogen and oxygen. Its average pore size is generally between 0.3 and 1.0 nanometers. Under ideal conditions, it allows oxygen molecules to enter the micro-pores while blocking nitrogen molecules. Through this sieving effect, nitrogen and oxygen are separated, thereby obtaining high-purity nitrogen.

2. Specific surface area: The larger the specific surface area, the stronger the adsorption capacity of the carbon molecular sieve, which can adsorb more oxygen molecules and thereby enhance the nitrogen production effect. The high specific surface area provides more active sites for gas adsorption, enabling carbon molecular sieves to process more air and produce more ammonia within a unit of time.

B/ Filling volume and uniformity

1. Filling volume: In ammonia production equipment, the filling volume of carbon molecular sieves directly affects the nitrogen production effect. Insufficient filling volume makes it impossible to fully process the raw air, and it is difficult to obtain high-purity and sufficient output nitrogen. However, excessive loading may lead to problems such as increased equipment costs and excessive bed resistance.

2. Filling uniformity: The filling uniformity of carbon molecular sieves in the adsorption tower is also very important. If the filling is not uniform, it will lead to uneven distribution of gas in the tower, resulting in excessive or insufficient adsorption in some areas, which will affect the overall adsorption and separation effect and reduce the purity and output of nitrogen.

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