CO 2 rich gas mixture hydrate-liquid water- vapor (H-Lw-V) equilibrium measurement and prediction Qazi Nasir 1, a , Khalik M Sabil * 2, 3, b and Bezhad Partoon 1, a 1 Department of Chemical Engineering Universiti Teknologi Petronas, Perak, Malaysia 2 Phase Separation Laboratory, Research center for CO 2 capture (RCCO 2 C) Universiti Teknologi Petronas, Perak, Malaysia 3 Heriot-Watt University, Malaysia , Level 2, Menara PjH, No. 2, Jalan Tun Abdul Razak, Precinct 2, 62100 Putrajaya, Federal Territory of Putrajaya Malaysia a qazinasir@gmail.com, b khalik_msabil@petronas.com.my, c behzadpartoon@gmail.com Keywords: Clathrate hydrate, carbon dioxide, Hydreval Abstract. In this paper we present experimental hydrate-liquid water vapor equilibrium data for mixtures of gas comprising rich CO 2 content. Data were generated by a reliable step-heating technique validated using measured data for CH 4 . The experimental results obtained in this measurement were compared with various commercial softwares (CSMGem, CSMHYD). The prediction results obtained with different software packages shows in weak agreement with experiment data point with high average absolute error (AAE) of 1.18 and 1.45 for hydrate equilibrium pressure condition while with model used in this work the average absolute error obtained is 0.01 respectively. Introduction Greenhouse gases e.g. CO 2 has a strong influence on our environment with its increasing level has a potential threat on climate and sea level.CO 2 capturing in the industry is not only challenging but suited to reduce global carbon emission. Various methods are employed for the removal of these industrial gases which have impact on global warming before being sent to atmosphere[1], however for the removal of these gases in designing process it is very important to consider the CO 2 quantity to be treated. Hydrate technology is an alternative approach for the removal of greenhouse gases which proves to be competitive for high concentrated mixture of CO 2 [2]. It is well known that CO 2 hydrate form at much lower pressure and higher temperature in comparison with methane. which means for CO 2 rich gas mixture is more susceptible for hydrate formation specially under deep water exploration, where transportation pipeline can be more than 100 Km long and temperature of transport liquid can be as low as 5 o C at pressure of 100 bar and is more likely that hydrate forms and block the pipeline [3, 4]. In this study comprises of measured hydrate liquid-water vapor (H-Lw-V) equilibrium data for CO 2 rich gas mixture based on hydrate dissociation condition and a comparison with commercially available softwares (CSMGem and CSMHYD) for prediction of gas hydrates equilibrium conditions[5]. Experimental Equipment and Method Material Gas composition in mole % consist of CH 4 (26.3), C 2 H 6 (0.94), C 3 H 8 (0.29), CO 2 (69.37) and N 2 (3.1) was purchased from Gas Walker SDN BHD with a cylinder capacity of 10L with a fill pressure of 45 bar and 0.6/m 3 gas volume. De-ionized water is used for the formation of hydrate in all experiments. Applied Mechanics and Materials Vol. 625 (2014) pp 386-389 © (2014) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/AMM.625.386 All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of TTP, www.ttp.net. (ID: 203.135.190.8-29/08/14,02:47:56)