Study of Selected Factors Affecting Hydrate-Based Carbon Dioxide Separation from Simulated Fuel Gas in Porous Media

Abstract

Hydrate-based gas separation is one of the potential methods of carbon dioxide capture from fuel gases (CO 2 /H 2 ) for an integrated coal gasification combined cycle (IGCC) power plant. In this study, the influences of selected factors, including porous properties, tetrahydrofuran (THF) concentration, sodium dodecyl sulfate (SDS) concentration, and initial pressure, of the operation system on hydrate phase equilibria, gas consumption, and gas separation are experimentally investigated by a designed orthogonal test method. It is found that the porous property is the most important factor on hydrate phase equilibria and CO 2 gas separation, where the gas separation becomes better in silica gel. The presence of THF moderates the hydrate phase equilibrium and improves the gas consumption and CO 2 gas recovery, and 3 mol % THF should be a suitable value for gas separation. The initial pressure has an important effect on the hydrate equilibrium pressure. With the increase of the driving force, the gas consumption increases, while the gas separation effect becomes worse.

Impact of fixed bed reactor orientation, liquid saturation, bed volume and temperature on the clathrate hydrate process for pre-combustion carbon capture

“…FBR can enhance the gas/ liquid contact and has the advantage of eliminating the need for high cost, energy intensive agitation for hydrate formation. Different porous media like silica gel, silica sand, light weight and highly porous foam, metallic packing, and glass beads have been employed as the bed in FBR (Adeyemo et al, 2010;Babu et al, 2013aBabu et al, , 2013bKang et al, 2013;Kumar and Kumar, 2015;Song et al, 2013). Babu et al (Babu et al, 2013a, 2013c) evaluated the performance of silica sand (inter particle pore space) and silica gel (intra particle pore space) as the bed material for CO 2 /H 2 and CO 2 / H 2 /propane system and reported that silica sand performed better.…”

Effect of different fixed bed media on the performance of sodium dodecyl sulfate for hydrate based CO 2 capture

“…More recently, people have investigated the effects of using novel materials such as polyurethane foam and metallic packing as packing media, on hydrate formation [44,51]. The kinetics of hydrate formation can also be enhanced by the use of surfactants such as Sodium Dodecyl Sulfate (SDS) in small doses of the order of ppm as additives [42,[52][53][54][55][56][57][58][59][60][61].…”

Evaluation of Gas Hydrate Anti-agglomerant Based on Laser Measurement

“…There are many potential applications based on hydrate, such as separation of gas mixtures. [1][2][3][4][5][6] However, the formation and agglomeration of hydrate can also cause plug in multiphase gas and oil transportation pipeline. 7 The injection of inhibitors is often adopted to solve the hydrate plug problem.…”