Asphaltene-Derived Activated Carbon and Carbon Nanotube Membranes for CO2 Separation
| Autor: | Georgios N. Karanikolos, Maria Kapsi, Benjamin Kueh, Abhijeet Raj, George Pilatos, Charitomeni M. Veziri, K. Suresh Kumar Reddy, Chrysoula Athanasekou |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Fabrication General Chemical Engineering Energy Engineering and Power Technology Sorption 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Fuel Technology Adsorption Membrane Chemical engineering law medicine Gas separation 0210 nano-technology Asphaltene Activated carbon medicine.drug |
| Zdroj: | Energy & Fuels. 32:11718-11730 |
| ISSN: | 1520-5029 0887-0624 |
| Popis: | Due to large energy requirements of the traditional gas separation processes, novel and less energy-intensive technologies, such as adsorption- and membrane-based ones, are anticipated to play major role in future industrial separations. Thus, finding new means for economical fabrication of materials related to these processes is of significant importance to facilitate their implementation in large-scale operations. In this work, we synthesized high-quality activated porous carbons (AC) and carbon nanotube (CNT) membranes using asphaltene, an abundant waste of the petroleum industry. The resulting materials were tested for CO2 separation in adsorption and membrane modes. Among the various porous carbons produced, AC from raw asphaltene reached a CO2 sorption capacity of 7.56 mmol/g at 4 bar and 25 °C with a relatively low heat of adsorption (up to 23 kJ/mol) implying low energy requirement for regeneration. The versatility of the asphaltene precursors in the formation of carbon nanomaterials was also demo... |
| Databáze: | OpenAIRE |
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