Molecular Sieve Dryer Design

A molecular sieve is a material with pores very small holes of uniform size.

Molecular sieve dryer design.

Molecular sieve technology is widely used for the simultaneous removal of water and mercaptans from both gas and liquid feed streams. A number of parameters influence the design and operation of a molecular sieve unit. The operating temperature and partial pressure of an impurity along with the type of molecular sieve 3a 4a 5a 13x defines the adsorption capacity of that impurity. A cyclical adsorption desorption system to transfer contaminants or non desired gas molecules from one stream to another.

Jalon molecular sieve for desiccant air dryer 4a and standard activated alumina provide the ideal combination of strength and adsorption capacity to produce reliable dry air that is reliable without causing equipment damage. Mokhatab gas processing consultant halifax nova scotia canada. Optimal design and operation of molecular sieve gas dehydration units part 1. Another feature of molecular sieve adsorbents is their ability to separate gases or liquids by molecular size or polarity.

In addition to these design guidelines there are additional considerations in liquid dryer design. These pore diameters are similar in size to small molecules and thus large molecules cannot enter or be adsorbed while smaller molecules can as a mixture of molecules migrate through the stationary bed of porous semi solid substance referred to as a sieve or matrix the components of highest molecular weight. This information is primarily concerned with the sizing of dryer units. The targeted valve installation is a molecular sieve dryer valve also known as.

Table 2 is a compilation of some suggested design guidelines extracted from commercial information on desiccant dryers. As it ages molecular sieve releases particulates that can be very damaging to downstream processes and instrumentation. Molecular sieve adsorbents are available in the following forms 3a k na zeolite a with a nominal pore opening of 3 å 0 3 nm 4a as synthesized na zeolite a with a nominal pore opening of 4 å 0 4 nm 5a ca na zeolite a with a nominal pore opening of 5 å 0 5 nm 13x na zeolite x with a nominal pore opening of 10 å 1 0 nm properties of basf molecular. A practical example of the function of molecular sieves is to dry ethanol.

Molecular sieves are in the family of desiccants also known as adsorbents used for hydrocarbon drying are used to remove dissolved water from hydrocarbon gases and liquids. As a brief overview on molecular sieve dryer. A molecular sieve works by adsorbing gas or liquid molecules that are smaller than the effective diameter of its pores while excluding those molecules that are larger than the openings. Herold contributing writer amsterdam the netherlands.