Strategically designed macromolecules as additives for high energy-density hydrocarbon fuels
Autor: | Yitong Dai, Dengfeng Ye, Hujun Xie, Ji Mi, Yongsheng Guo, Wenjun Fang, Di Wu, Haiyun Sun |
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Rok vydání: | 2020 |
Předmět: |
chemistry.chemical_classification
Chemistry 020209 energy General Chemical Engineering Organic Chemistry Ethyleneimine Energy Engineering and Power Technology 02 engineering and technology Heat sink Scavenger (chemistry) Supercritical fluid Cracking Fuel Technology Hydrocarbon 020401 chemical engineering Chemical engineering 0202 electrical engineering electronic engineering information engineering Density functional theory 0204 chemical engineering Macromolecule |
Zdroj: | Fuel. 270:117433 |
ISSN: | 0016-2361 |
Popis: | To improve oxidative stability and heat sink of hydrocarbon fuels, a series of versatile macromolecular additives, BHPEI and CBHPEI, were synthesized by modification of hyperbranched poly(ethyleneimine) (HPEI). These macromolecules were used as circumstance-dependent additives in JP-10, a high energy–density hydrocarbon fuel. Each strategically designed macromolecule serves not only as a radical scavenger to improve the thermal-oxidative stability of hydrocarbon fuels at relatively low temperature, but also as a cracking initiator for heat sink enhancement as the temperature rises. According to the ASTM E1858, with the addition of BHPEI-10K at 500 ppm, the oxidation induction time of JP-10 under 175 °C could increase from 9.3 min to 14.8 min. The insoluble deposits could be reduced by 73% with the addition of 500 ppm BHPEI-10K according to accelerated oxidation tests. The superior antioxidation capability of macromolecular antioxidants were further elucidated by density functional theory (DFT) calculations. Furthermore, the BHPEI-10K performed decently as a macromolecular initiator for supercritical cracking of JP-10, with a dosage of 0.1 wt%, the conversion of JP-10 at 675 °C can be elevated from 16.4% to 33.4% and the corresponding heat sink can be improved from 1.98 MJ/kg to 2.15 MJ/kg. |
Databáze: | OpenAIRE |
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