String To Characterize the Field Synergy during CO2 Capture by CaCl2-Supported MEA Adsorbent

Autor:	Yun S. Yu, Xiao M. Wu, De L. Mu, Zao X. Zhang
Rok vydání:	2014
Předmět:	Chromatography Field (physics) Chemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Reaction coordinate General Energy Adsorption Chemical engineering Particle diameter C++ string handling Physical and Theoretical Chemistry Diffusion (business) Micro mechanism Porosity
Zdroj:	The Journal of Physical Chemistry C. 119:473-485
ISSN:	1932-7455 1932-7447
DOI:	10.1021/jp510610v
Popis:	CO2 capture is quite effective for protecting the environment. A CaCl2-supported MEA adsorbent was identified as an efficient adsorbent. To design this adsorbent more efficiently from the field synergy, a string method model was developed to characterize field synergistic effects. Experiments were performed to validate the string used to integrate macro and micro mechanisms of reaction and diffusion. Synergistic effects reduced the string damping time by 26%. Mole ratios of MEA/CaCl2 influenced the damping time and string mass much more than the porosity and particle diameter. The free energy and N—C reaction coordinate respectively decreased by 30% and 40% as MEA/CaCl2 mole ratios decreased from 3:1 to 1:1. The addition of CaCl2 produced a 22.7% string mass decrease, which reduced the energy consumption by 30% and improved capture capacity by 27%. The string to characterize the field synergy is developed as a useful method to improve the conventional adsorbent design.
Databáze:	OpenAIRE
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