Abstract
In a fluidization process, a bed of solid particles acquires fluid-like properties by passing a gas of liquid through it. An efficient bed-to surface heat transfer and a temperature uniformity are among the major advantages of a gas-fluidized bed reactor, widely used in chemical processing industries, particularly in separation and in catalytic reactions. Its performance, however, depends highly on its hydrodynamics, where solid fraction (α) plays a significant role. Thus, techniques that enable the measurement of α across different sections of the bed are highly important.