Sorbents superficial velocity

The adsorption kinetics was sufficiently fast so that the sorbent did adsorb the CO2 produced in the SE-SMR process for Ug < 0.89 m/s until sorbent breakthrough. The adsorption rate of CO2 was higher at higher gas superficial velocity and higher pressure. The best value of steam-to-carbon ratio was about 4 considering the balance between higher hydrogen production and lower steam consumption. The simu-... 

Atmospheric Fluidized Bed Combustors (AFBC), operating at nearly atmospheric pressure, are fluidized with superficial air velocities from 1 to 4 m/s. During operation, the bed consists of sorbent particles (limestone or dolomite), ash particles and coal. Coal particles burn at about 900°C, which is roughly half of the combustion temperature in pulverized coal-fired boilers. Although the coal particles constitute only about 1% of the total bed material, the bed temperature is uniform and about 100°C lower than the coal particle temperature, due to the excellent heat transfer characteristics generated by the... 

The main fluid bed reactor quantities that influence the degree of desulfurization in a fluid bed combustor are respectively (21-25) the soibent residence time, the superficial gas velocity, the stoichiometric air ratio, the bed temperature and the mean bed particle size the main sorbent properties of influence are respectively the mean soibent particle size, the maximum sorbent CaO conversion and the sulfation kinetic rate constant The most important system parameter is, of course, the (Ca/S) molar ratio in the reactor feed. 

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