Journal
CHEMSUSCHEM
Volume 13, Issue 23, Pages 6426-6432Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202002230
Keywords
activated carbons; activation; CO2 capture; dechloridation; polyvinyl chloride
Funding
- National Key R&D Program of China [2016YFB0600902]
- Dalian National Laboratory for Clean Energy [DNL180401]
- National Natural Science Foundation of China [21925803]
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Polyvinyl chloride (PVC) is the world's third-most widely produced plastic polymer. Directly transforming PVC to carbonaceous materials for CO2 capture provides an environmentally friendly and attractive strategy to recycle plastics. In this work, a simple and effective method was developed to prepare PVC-derived carbon spheres. In this method, the classical spheroidization process shaped the original PVC powders into millimeter spheres, and a special dehalogenation and cross-linking process in the presence of a phase-transfer catalyst transferred the thermoplasticity of the PVC-spheres into thermosetting, which stabilized the shape. Furthermore, by rationally adjusting the activation conditions, the porous structure of the carbon spheres was well optimized. With a specific surface area up to 1738 m(2) g(-1) and the developed microporous structure, the as-prepared carbon spheres showed not only excellent performance in pure CO2 adsorption (8.93 mmol g(-1), 39.3 wt% at 0 degrees C and 5.47 mmol g(-1), 24.1 wt% at 25 degrees C), but also outstanding adsorption capacity and recyclability in low-concentration CO2 capture, even superior to conventional molecular sieves.
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