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Title: Retrofitting industrial, conventional column systems to petyluk/divided wall columns
Keywords: Divided Wall Column, Simulation, Retrofitting, HYSYS, Fully Thermally Coupled Distillation System, Petyluk Columns
Issue Date: 17-Aug-2008
Citation: RAMACHANDRAN PREM KUMAR (2008-08-17). Retrofitting industrial, conventional column systems to petyluk/divided wall columns. ScholarBank@NUS Repository.
Abstract: Distillation is the most common separation process in chemical process industries, and requires significant energy inputs. Petyluk column (also known as Fully Thermally Coupled Distillation System, FTCDS) is chosen for this study due to its lower energy consumption compared to the conventional column system. Its implementation in terms of the equivalent, Divided Wall Column (DWC) is also considered. The main objective of this study is to investigate the potential of retrofitting conventional 2-column systems in operation for separating ternary mixtures into three products. For this, six applications of industrial importance are identified and conventional 2-column systems are designed, which are assumed to be currently in operation in the plants. Then, retrofitting these systems to both FTCDS and DWC is studied. A step-by-step procedure starting from shortcut calculations is developed for simulating and optimizing a FTCDS/DWC in HYSYS. Results show that retrofitting the existing 2-column systems is very attractive both economically and for reduced energy requirements.
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