Identify the cause of liquid maldistribution inside packed beds

Lowell Pless is BusinessDevelopment Manager of DistillationApplications for Tracerco inPasadena, Texas. He has been applying radioisotope techniques in process troubleshooting for 30 yr,originally with Tru-Tec Services(acquired by Tracerco in 2006). Mr. Pless previously held positions in Europe and North/South America asOperations Manager, and he began the tower scanning service for Tru-Tec in Western Europe and the MiddleEast. His early engineering development came as aProcess and Systems Engineer and Unit Operations Supervisor for Celanese Chemical Co., Calumet Lubricants and Foxboro. Mr. Pless earned a BS degree in chemical engineering from the University of Texas atAustin, is a registered Professional Engineer in Texas, participates on the Design and Practices committee for Fractionation Research (FRI), and is a senior member of the American Institute of Chemical Engineers.