Simulation, optimization, and sensitivity analysis of a natural gas dehydration unit

Application of relative sensitivity function in parametric optimization of a tri-ethylene glycol dehydration plant

“…Among the parameters mentioned in the previous section, the flow rate of the wet gas is fixed at the studied unit and therefore is not changed during this optimization practice. In addition, the effect of lean TEG concentration has previously been studied extensively in the literature (Ghiasi et al, 2015;Isa et al, 2013;Nemati Rouzbahani et al, 2014); therefore it is not considered here. Hence, the parameters that are changed during the present optimization practice only include glycol circulation rate and temperature of the absorber (or inlet wet gas temperature), which are discussed below.…”

“…This is due to the fact that the presence of water molecules can form clathrate hydrates leading to pipeline plugging which is one of the most serious problems in the gas industry (Rahimpour et al, 2013a;Wen et al, 2012). The processes which are used for gas dehydration fall into five categories in principle: absorption with solvent, adsorption, gas permeation, refrigeration, and ultrasonic separation (Gandhidasan et al, 2001;Lin et al, 2013;Nemati Rouzbahani et al, 2014;Netusil and Ditl, 2011;Yang et al, 2014a;Yang et al, 2014b). Among these methods, absorption is the most commonly used process for natural gas dehydration and is the most attractive one from an economic point of view (Isa et al, 2013;Woodcock and Gottlieb, 2000).…”

Technical and economic evaluation of triethylene glycol regeneration process using flash gas as stripping gas in a domestic natural gas dehydration unit

“…Their results showed that revamping of trays with structured packing could reduce outlet natural gas dew point and improve the positive effect of other parameters on the performance of the dehydration unit. Rouzbahani et al simulated a natural gas dehydration unit located in Iran and included its regeneration package of DEG in the steady‐state simulation …”

Gas drying with ionic liquids

“…The existing methods for gas drying can be divided into two main categories: absorption (with liquid media) and adsorption (with solid media) . Gas drying by absorption with liquid media has been widely used in industries, and the most common absorbents are glycol‐based absorbents, for example, diethylene glycol (DEG), triethylene glycol (TEG), and monoethylene glycol (MEG) . The gas drying process with glycol absorbents usually consists of an absorption column and a desorption column.…”