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首页> 外文期刊>Energy & fuels >Hyperbranched Poly(amidoamine) as an Efficient Macroinitiator for Thermal Cracking and Heat-Sink Enhancement of Hydrocarbon Fuels
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Hyperbranched Poly(amidoamine) as an Efficient Macroinitiator for Thermal Cracking and Heat-Sink Enhancement of Hydrocarbon Fuels

机译：超支化聚（酰胺基胺）作为烃类燃料热裂解和散热增强的高效大分子引发剂

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摘要

One of the amidoamine-structured hyperbranched polymers is developed as an efficient macroinitiator to enhance the endothermic capacity of hydrocarbon fuels to meet the stringent cooling requirement of hypersonic aircrafts. Hyperbranched poly(amidoamine) (PAMAM) is treated with palmitoyl chloride to modify a lipophilic shell on the hydrophilic core, and the amphiphilic product, palmitoyl-hyperbranched poly(amidoamine) (PPAMAM), can be well-dissolved in hydrocarbon fuels. The long alkyl chains in PPAMAM break away from the core at about 200 degrees C, and the PAMAM core destructs around 400 degrees C. The high decomposition temperature of the core enables PPAMAM to be performed as a macroinitiator for hydrocarbon fuels. Thermal cracking of methylcyclohexane (MCH) from 600 to 720 degrees C with the addition of PPAMAM is carried out in an electrically heated tubular reactor under the pressure of 3.5 MPa. Significant improvements of the conversion, gas yield, and heat sink of MCH with PPAMAM are observed. The conversion of MCH is increased from 39.5 to 56.3 wt % at 690 degrees C, and the corresponding heat sink has been raised from 2.48 to 2.91 MJ/kg. Furthermore, PPAMAM with the optimum molecular weight is employed for the cracking of aviation kerosene. The heat sink is also improved significantly in comparison to that from the thermal cracking of bare kerosene, which confirms the effective application of PPAMAM in endothermic hydrocarbon fuels.
机译：已开发出一种酰胺基胺结构的超支化聚合物，作为一种有效的大分子引发剂，可增强烃类燃料的吸热能力，以满足高超音速飞机的严格冷却要求。用棕榈酰氯处理超支化聚（酰胺基胺）（PAMAM），以修饰亲水核上的亲脂壳，两亲产品棕榈酰-超支化聚（酰胺基胺）（PPAMAM）可以很好地溶解在烃类燃料中。 PPAMAM中的长烷基链在约200摄氏度时脱离核心，而PAMAM核心在约400摄氏度时发生破坏。核心的高分解温度使PPAMAM可用作烃类燃料的大分子引发剂。在加热的管式反应器中，在3.5 MPa的压力下，通过添加PPAMAM，将甲基环己烷（MCH）从600℃加热至720℃。观察到使用PPAMAM的MCH的转化率，产气量和热沉显着提高。在690摄氏度下，MCH的转化率从39.5 wt％增加到56.3 wt％，相应的散热器从2.48 MJ / kg提高到2.91 MJ / kg。此外，具有最佳分子量的PPAMAM被用于裂解航空煤油。与裸露煤油的热裂解相比，散热器也得到了显着改善，这证实了PPAMAM在吸热烃燃料中的有效应用。

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  • 来源
    《Energy & fuels》 |2017年第7期|6848-6855|共8页
  • 作者

    He Guijin; Wu Xi; Ye Dengfeng; Guo Yongsheng; Hu Shenlin; Li Yu; Fang Wenjun;

  • 作者单位

    Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China;

    China Aerosp Sci & Ind Corp, Res Inst 31, Sci & Technol Scramjet Lab, Beijing 100074, Peoples R China;

    China Aerosp Sci & Ind Corp, Res Inst 31, Sci & Technol Scramjet Lab, Beijing 100074, Peoples R China;

    Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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