This only happens once a century. This month, CE elevates a milestone: 100 years uninterrupted publication. What this century has proved is the versatility-and adaptability-of chemical engineers.

Designing fluidied-bed distributors. In addition to practicle size, gas velocity, and residence time, which are all critical bed, propped design of the gas distributor can directly improve system performance.

Quenching hot exaust-A key aspect of pollution control. High temperature post-incineration fluegases must be quenched before entering downstream air-pollutioncontrol systems. But care must be taken to prevent the formation of damaging particulate mater.