Kinetic and heat duty study of aprotic heterocyclic anion-based dual functionalized ionic liquid solutions for carbon capture
| Autor: | Guohua Jing, Junhai Wu, Zuoming Zhou, Bihong Lv, Chengrui Lin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Arrhenius equation
Chemistry 020209 energy General Chemical Engineering Organic Chemistry Kinetics Heat duty Energy Engineering and Power Technology 02 engineering and technology Kinetic energy Ion Reaction rate chemistry.chemical_compound symbols.namesake Fuel Technology 020401 chemical engineering Desorption Ionic liquid 0202 electrical engineering electronic engineering information engineering symbols Physical chemistry 0204 chemical engineering |
| Zdroj: | Fuel. 263:116676 |
| ISSN: | 0016-2361 |
| Popis: | Due to its excellent and reversible CO2 uptake, the novel aprotic heterocyclic anion-based dual functionalized ionic liquid solution ([DETAH][AHA]) presented as an efficient candidate for CO2 capture. The kinetics of CO2 capture into [DETAH][AHA] solutions, e.g., [DETAH][Im] and [DETAH][Tz], was studied by using a double-stirred cell, with concentrations ranging from 0.25 to 1.0 mol/L and temperatures from 303 to 333 K. The overall first-order reaction rate constants (kov) and the secondary-order reaction rate constants (k2, FIL) of CO2 capture into this two [DETAH][AHA] solutions were obtained, and they all increased as the temperature increased. The relationship between k2, FIL and reaction temperature was determined by Arrhenius equation, which expressed as k 2 = 1.0365 × 10 12 exp - 5873.67 T and k 2 = 3.5361 × 10 12 exp - 6380.60 T , respectively. The calculated activation energies of such two solutions were 48.83 kJ/mol and 53.05 kJ/mol, respectively. From the heat duty evaluation, the total CO2 regeneration energy consumption of [DETAH][Im] and [DETAH][Tz] were respectively 2.94 and 2.84 GJ·mol−1 CO2, which were all less than that of traditional MEA solution due to their lower desorption reaction heat. A fast absorbent rate, a lower activation energies and regeneration energy consumption of [DETAH][AHA] solutions indicate greater potential and application prospects. |
| Databáze: | OpenAIRE |
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