کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8090221 1521970 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Toward rational selection of amine solutions for PCC applications: CO2 absorption kinetics and absorption heat in tertiary aqueous solutions
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Toward rational selection of amine solutions for PCC applications: CO2 absorption kinetics and absorption heat in tertiary aqueous solutions
چکیده انگلیسی
The CO2 absorption kinetics in aqueous 1-(2-hydroxyethyl)-piperidine (1-(2-HE)PP), 1-(2-hydroxyethyl)pyrrolidine (1-(2-HE)PRLD) and 3-diethylamino-1,2-propanediol (DE-1,2-PD) solutions have been studied using the stopped-flow technique over the temperature range of 293 K-313 K. In order to analyze the kinetics results, the base-catalyzed hydration mechanism and artificial neural network (ANN) models were employed to represent the kinetics results of those three solvents, and all gave acceptable ADDs less than 10%. In addition, the reaction rate constants (k2) and protonation constants (K1) of amines also were presented. The Brønsted plots between protonation constant (K1) and kinetics parameter (k2) have been established to understand the relationship between protonation constant and kinetics. The CO2 absorption heats (△Ha) of those three solvents were also obtained by using the Gibbs Helmholtz equation. Based on a comparison with other amines such as MEA, MDEA and 1DMA2 P with respect to kinetics and absorption heat, the order is as follows: kinetics (MEA > DEA > DEAB > DE-1,2-PD > 1-(2-HE)PRLD > 1-(2-HE)PP > DMMEA > 1DMA2P > MDEA.) and CO2 absorption heat (MEA > DEA > MDEA > DEAB > DE-1,2-PD >1-(2-HE)PRLD > 1-(2HE)PP > 1DMA2P). The overall evaluation of amines for application CCS in terms of absorption and desorption is discussed, providing helpful information for the screening of novel amines.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Greenhouse Gas Control - Volume 50, July 2016, Pages 206-217
نویسندگان
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