Amphiphilic-Polymer-Coated Carbon Nanotubes as Promoters for Methane Hydrate Formation
| Autor: | Rong-Bo Guo, Gang Guo, Yuan-Mei Song, Fei Wang, Sheng-Jun Luo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Nanotube
Renewable Energy Sustainability and the Environment 020209 energy General Chemical Engineering Inorganic chemistry Clathrate hydrate 02 engineering and technology General Chemistry Carbon nanotube engineering.material Methane law.invention chemistry.chemical_compound chemistry Chemical engineering Coating law 0202 electrical engineering electronic engineering information engineering engineering Environmental Chemistry Sodium dodecyl sulfate Hydrate Amphiphilic copolymer |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 5:9271-9278 |
| ISSN: | 2168-0485 |
| Popis: | Despite being a good promoter for methane hydrate formation, carbon nanotubes (CNTs) aggregate easily, which weakens their promotion effect. In this work, highly dispersed carbon nanotubes (CNTs) were prepared by coating the nanotube surface with an amphiphilic copolymer, namely, poly(styrene-co-sodium styrenesulfonate) (PSCS), to accelerate methane hydrate formation. In the presence of functionalized CNTs (f-CNTs), the hydrate storage capacity increased from 46 ± 8 to 138 ± 8 v/v when the PSCS/CNT mass ratio (R) was increased from 0 to 20. In addition, the hydrate formation period gradually shortened as the R value was increased from 5 to 20. The methane uptake was also enhanced from 68 to 135 mmol of gas/(mol of water) as the f-CNT loading was changed from 10 to 150 ppm. Meanwhile, hydrate formation could be completed within 100 min in f-CNT dispersions with high concentrations. Compared with those formed using sodium dodecyl sulfate (SDS) as the promoter, the hydrates formed with f-CNTs as the promoter... |
| Databáze: | OpenAIRE |
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