This paper presents two novel conceptions in multi-stage hydrate separation technology for H 2+CH 4 system, i.e. the multi-stage equilibria adsorption and the reaction adsorption.It is assumed that there already exist...This paper presents two novel conceptions in multi-stage hydrate separation technology for H 2+CH 4 system, i.e. the multi-stage equilibria adsorption and the reaction adsorption.It is assumed that there already exists clathrate structure before the hydration reaction, and the hydration reaction is taken as gaseous adsorption in the crystal structure of hydrate.During the simulation of multi-stage equilibria adsorption, gases and water interact on every equilibrium stage till establishing full equilibria, wherein the gases that just entered one stage are in equilibrium with the liquid phase of the previous stage, and the water that just entered one stage is in equilibrium with the gas phase of the previous stage as well.A kinetic model of hydrate growth for methane is introduced into the reaction adsorption so that this simulation is closer to the reality.As hydrogen doesn’t react with water to form hydrate, the amount of hydrogen adsorption is calculated according to the proportion of methane and hydrogen adsorbed in the small cavities.Simultaneously, the plate column is employed as an example, where the gas-hydrate phase loads and hydrogen mole fraction are calculated by the multi-stage equilibria adsorption and reaction adsorption methods, and the results calculated by the two said methods are compared.展开更多
文摘This paper presents two novel conceptions in multi-stage hydrate separation technology for H 2+CH 4 system, i.e. the multi-stage equilibria adsorption and the reaction adsorption.It is assumed that there already exists clathrate structure before the hydration reaction, and the hydration reaction is taken as gaseous adsorption in the crystal structure of hydrate.During the simulation of multi-stage equilibria adsorption, gases and water interact on every equilibrium stage till establishing full equilibria, wherein the gases that just entered one stage are in equilibrium with the liquid phase of the previous stage, and the water that just entered one stage is in equilibrium with the gas phase of the previous stage as well.A kinetic model of hydrate growth for methane is introduced into the reaction adsorption so that this simulation is closer to the reality.As hydrogen doesn’t react with water to form hydrate, the amount of hydrogen adsorption is calculated according to the proportion of methane and hydrogen adsorbed in the small cavities.Simultaneously, the plate column is employed as an example, where the gas-hydrate phase loads and hydrogen mole fraction are calculated by the multi-stage equilibria adsorption and reaction adsorption methods, and the results calculated by the two said methods are compared.
