Yang, Q.
Quan Yang is a Sulzer Senior Technical Expert, specializing in mass transfer components. He is in charge of air separation knowledge management within Sulzer Chemtech. Recently, his field expanded to process optimization for DWC. He holds a PhD in environmental engineering from the National University of Singapore.
The purification of benzoic acid using dividing wall columns
In one recent project for a customer based in Asia, the authors’ company suggested the combination of distillation and crystallization techniques to obtain high-quality purified benzoic acid. Encouraged by the successful startup of this processing train, the customer began to schedule a second project. The authors’ company was asked to optimize the purification process to improve cost and operational efficiencies. The two existing columns, which remove lights and heavies, respectively, from the crude benzoic acid feedstock were investigated to identify key opportunities. The feasibility study based on the feed composition confirmed that the existing columns could be converted into a single dividing wall column (DWC).
Dividing wall columns for fatty acids fractionation
The use of dividing wall columns (DWCs) has been a hot topic over the past decades, as DWCs can potentially bring huge savings in operational costs and capital investment.
CFD study of mixing performance of redistribution systems for packed columns
The maldistribution of liquid flow within long packed beds is a well-known phenomenon in distillation and absorption columns. In a packed column, the maldistribution of liquid results in differences in liquid concentration across the column.
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