Analysis of Acid Gas Absorption in a Mixed Amine
Madziva, Nyasha.
2017
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Abstract: Chemical absorption and stripping of the acid gases, carbon dioxide and hydrogen sulfide, is an important unit operation in industrial gas processing. The goal of this thesis was to develop computationally efficient, accurate and robust algorithms for calculating local interphase transfer rates in absorption and stripping columns. Within the context of steady-state Film Theory, mass tran... read moresfer is governed by a set of nonlinear differential equations. An approximate solution was developed by applying a variant of the linearization technique of Van Krevelen and Hoftijzer (1948). The algorithm was applied to simulate absorption of CO2 and H2S in aqueous blends of diethanolamine (a secondary amine) and methyldiethanolamine (a tertiary amine). Calculated enhancement factors, by which reactions multiply absorption rates, differed by less than 5% from exact values. The results also conformed with the well-established behavior of tertiary amine solutions: H2S absorption is gas-phase mass transfer-limited and CO2 absorption is liquid-phase kinetics-limited.
Thesis (M.S.)--Tufts University, 2017.
Submitted to the Dept. of Chemical and Biological Engineering.
Advisor: Jerry Meldon.
Committee: Derek Mess, and Christoph Börgers.
Keyword: Chemical engineering.read less - ID:
- z316qc86k
- Component ID:
- tufts:22415
- To Cite:
- DCA Citation Guide EndNote
