Thermodynamics and kinetics analysis of Ca-looping for CO2 capture: Application of carbide slag
| Autor: | Quxiu Dai, Hongpan Liu, Yi Wei, Jie Yang, Bounkhong Keomounlath, Liping Ma |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Thermogravimetric analysis
Materials science 020209 energy General Chemical Engineering Carbonation Organic Chemistry Energy Engineering and Power Technology Slag Thermodynamics 02 engineering and technology Carbide law.invention chemistry.chemical_compound Fuel Technology 020401 chemical engineering Acetylene chemistry law visual_art 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Calcination 0204 chemical engineering Thermal analysis Calcium looping |
| Zdroj: | Fuel. 242:1-11 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/j.fuel.2019.01.018 |
| Popis: | The calcium looping process, which is based on the calcination/carbonation of CaCO3, has emerged over the years as a recommended low cost technology for post-combustion CO2 capture. In this work, a novel Ca-based material (carbide slag) is proposed for CO2 capture through the Ca-looping method. Carbide slag is a by-product generated in the process of acetylene production, and its main components are Ca(OH)2 and CaCO3. In this work, CO2 was chemisorbed by CaO solid particles derived from precalcination of inexpensive and widely available carbide slag. The reaction mechanism was investigated by the thermodynamics software-FactSage and by Thermogravimetric Analysis-Differential Thermal Analysis (TG-DTA). The study found that the temperature of CO2 capture should be more than 650 °C and lower than 900 °C. Moreover, the carbide slag showed good stability for over 20 cycles of calcination/carbonation. Further, the kinetics of calcination/carbonation were investigated by the Kissinger method, Flynn-Wall-Ozawa (FWO) method and Coats-Redfern method. The results of this work indicate that carbide slag is a suitable material for CO2 capture by Ca-looping technology, which would be very helpful for carbide slag resource utilization. |
| Databáze: | OpenAIRE |
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