"Among the several techniques of FUSO, special attention has been devoted to the periodic alternation of feed introduction between the ends of the packed-bed catalytic reactor, denominated by reverse-flow operation (RFO), whose advantages were enumerated by Matros (1990)."[REF]
"Recently, stemming from the pioneering work of Matros and coworkers there has been considerable interest in the cyclic operation of catalytic reactors by periodic flow reversal."[REF]