Design and modeling of the process of natural gas dehydration by adsorption method

In this paper, the simulation of the natural gas dehydration process by adsorption method has been studied. This process has been designed to remove water and reaching it to the allowed amount in the natural gas. The process consists of four beds, and each bed has two layers. Three beds are adsorbing and the fourth bed is regenerating. Molecular absorbents and active alumina have been used to absorb water in gases. The feed gas in this process is saturated from the water and includes methane, nitrogen, water, and carbon dioxide, and is entered to the bed at the temperature of 42 ° C and the pressure of 90 bar. Aspen and Matlab have been used to design and model this process. In this simulation, the amount of water in the gas reaches to less than 0.09 ppm, with an allowable value of 0.1 ppm. The results show the developed model can predict the process outputs with acceptable accuracy.