Development of a Rate-Based Mass Transfer/Reaction Model Using Data From An Industrial NOx Absorption Process

Wednesday, November 10, 2010: 2:10 PM
252 A/B Room (Salt Palace Convention Center)
Kyle G. Loutet1, Andres Mahecha-Botero2, Tony Boyd1, Steven Buchi1, Doug Reid3 and Clive M.H. Brereton1, (1)NORAM Engineering and Constructors Ltd., Vancouver, BC, Canada, (2)Fluidization Research Centre, University of British Columbia, Vancouver, BC, Canada, (3)Hunstman Polyurethanes (UK) Ltd., Redcar, United Kingdom

An industrial reactive separation process for NOx absorption into water and nitric acid in a world-scale mononitrobenzene (MNB) plant in Redcar, UK was investigated. Gas- and liquid-phase concentrations were measured in situ while operating conditions such as temperature, pressure and absorbent flow were varied. Furthermore, a comprehensive mass transfer/reaction model was developed in the process simulator Aspen Plus to simulate the absorption process, with the field process data used for validation. The model accurately predicted NOx removal from the gas (i.e. typically within 3.5% of the plant data). Other key findings are that the model successfully predicted changes in performance when key parameters such as temperature and pressure were varied. Furthermore, the addition of a bleaching section was investigated, resulting in a significant improvement in NOx removal. Currently, the completed model is used to simulate existing and proposed NOx absorption systems and to develop new and innovative designs for NOx capture.

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See more of this Session: Advances in Distillation & Absorption IV
See more of this Group/Topical: Separations Division