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Journal of Applied Sciences
  Year: 2014 | Volume: 14 | Issue: 11 | Page No.: 1220-1224
DOI: 10.3923/jas.2014.1220.1224
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Energy Saving in Distillation with Side-stripper and Side-rectifier Sequence of Natural Gas Liquid Processing

S.Y. Yasmin, M.Z. Rohani and M.S. Ruzitah

Distillation process is one of the common separation methods typically for three or more components despite involving energy intensive procedures. In natural gas liquid processing, propane and butane are the most expensive and widely used products, together with ethane and stabilized condensate are produced through series of conventional distillation columns. This sequence consume massive amount of energy which contribute more than 40% of the overall plant energy. Therefore, process modification of conventional distillation sequence can lead to reduce energy consumption thus minimizing annual operating cost. A strategy in this work is focusing in promoting energy efficient design through adaptation of complex column to existing columns by introducing side-stripper and side-rectifier schemes. A steady state approach using Aspen Plus HYSYS comparing between conventional and two complex columns scheme (side-stripper and side-rectifier) and energy analysis resulting favourable result which offers energy reduction for both side-stripper and side-rectifier sequences. Side-stripper gives higher percentage compared to side-rectifier which is 68% (for reboiler) and 70% (for condenser). Side-rectifier shows reduction of 55% (for reboiler) and 60% (for condenser). Both sequences give promising result to introduce energy saving by complex columns design replacing conventional sequence in future.
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How to cite this article:

S.Y. Yasmin, M.Z. Rohani and M.S. Ruzitah, 2014. Energy Saving in Distillation with Side-stripper and Side-rectifier Sequence of Natural Gas Liquid Processing. Journal of Applied Sciences, 14: 1220-1224.

DOI: 10.3923/jas.2014.1220.1224






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