NDLI: Experimental Investigation of Enhanced Absorption of Carbon Dioxide in Diethanolamine in a Microreactor

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ganapathy, Harish Shooshtari, Amir Dessiatoun, Serguei Alshehhi, Mohamed Michael, M. Ohadi
Copyright Year	2013
Abstract	Natural gas in its originally extracted form comprises carbon dioxide and hydrogen sulfide as small, but non-negligible fractions of its dominant component, methane. Natural gas in the above form is typically subjected to a sweetening process that removes these acid gases. Microscale technologies have the potential to substantially enhance mass transport phenomena on account of their inherently high surface area to volume ratio. The present work reports the mass transfer characteristics during gas-liquid absorption in a microreactor. The absorption of CO2 mixed with N2 into aqueous diethanolamine was investigated in a single straight channel having a hydraulic diameter of 762 micrometer and circular cross-sectional geometry. The performance of the reactor was characterized with respect to the absorption efficiency and mass transfer coefficient. Close to 100% absorption efficiency was obtained under optimum operating conditions. Shorter channel lengths were observed to yield enhanced values of mass transfer coefficient on account of the improved utilization of the liquid reactants’ absorption capacity for a given reactor volume. In comparison to the 0.5 m long channel, the mass transfer coefficients with the 0.3 m and 0.1 m channels were higher on an average by 35.2% and 210%, respectively. Parametric studies investigating the effects of phase superficial velocity, liquid and gas phase concentration were performed. The mass transfer coefficients achieved using the present minichannel reactor were 1–3 orders of magnitude higher than that reported using conventional gas-liquid absorption systems.
Sponsorship	Fluids Engineering Division Heat Transfer Division
File Format	PDF
ISBN	9780791855591
DOI	10.1115/ICNMM2013-73162
Conference Proceedings	ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels
Language	English
Publisher Date	2013-06-16
Publisher Place	Sapporo, Japan
Access Restriction	Subscribed
Subject Keyword	Microreactor Minichannel Chemical reaction Microchannel Mass transfer Co2 absorption Absorption Carbon dioxide
Content Type	Text
Resource Type	Article

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