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首页> 外文期刊>Journal of Energy Resources Technology >Rheological Properties and Ignition and Combustion Characteristics of Biochar-Algae-Water Slurry Fuels
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Rheological Properties and Ignition and Combustion Characteristics of Biochar-Algae-Water Slurry Fuels

机译：生物炭-藻类-水浆状燃料的流变特性及点火燃烧特性

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摘要

This study examined the rheological properties, ignition, and combustion characteristics of biochar-algae-water (BAW) slurry fuels. A pine sawdust biochar with a median particle size (D-50) of approximately 12 mu m and algae Chlorella vulgaris in dry powder form with D-50 of approximately 19 mu m were used. The BAW slurries with a constant solid loading of 40 wt % and algae/biochar ratio varying from 0 to 0.2 by weight were prepared. The apparent viscosity was measured using a Haake VT550 cone-and-plate viscometer. The stability of the slurries was characterized using a "drop rod" method. Ignition and combustion characteristics of the slurries were studied using a suspended single-droplet technique. A single droplet of a slurry fuel with a diameter ranging from 0.5mm to 1.5mm was suspended on a silicon carbide fibre and burned in air at 1023 K in an electrically heated tube furnace. The ignition and combustion processes of the droplet were recorded using a CCD camera at 200 fps. The ignition delay time, burnout time, and burning rate were determined. The BAW slurries showed shear-thinning flow behavior. The slurries had higher viscosity and greater stability at higher algae proportion in the solid. The ignition and combustion process of BAW slurries followed the sequence of water evaporation, devolatilization, ignition, and combustion of the solid residue. The combustion of the residual solid was diffusion controlled under the experimental conditions and the burning rates of the BAW slurry droplets ranged from 0.15 to 0.25mm(2) s(-1).
机译：这项研究检查了生物炭-藻类水（BAW）浆状燃料的流变特性，着火和燃烧特性。使用中值粒径（D-50）约为12微米的松木屑生物炭和D-50约为19微米的干粉藻类小球藻。制备具有40重量％的恒定固体载量和藻类/生物炭比为0至0.2重量％的BAW浆料。使用Haake VT550锥板粘度计测量表观粘度。使用“落杆”方法表征浆料的稳定性。使用悬浮单液滴技术研究了浆料的点火和燃烧特性。将单滴直径为0.5mm至1.5mm的浆状燃料悬浮在碳化硅纤维上，并在1023 K的电加热管式炉中在空气中燃烧。使用CCD相机以200 fps记录液滴的点火和燃烧过程。确定了点火延迟时间，燃尽时间和燃速。 BAW浆液表现出剪切稀化的流动特性。在固体中较高的藻类比例下，浆料具有较高的粘度和较高的稳定性。 BAW浆料的着火和燃烧过程遵循水蒸发，脱挥发分，着火和固体残留物燃烧的顺序。残留固体的燃烧在实验条件下进行扩散控制，BAW浆料液滴的燃烧速率范围为0.15至0.25mm（2）s（-1）。

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  • 来源
    《Journal of Energy Resources Technology》 |2018年第6期|062203.1-062203.6|共6页
  • 作者

    Zhu Mingming; Zhang Zhezi; Liu Pengfei; Zhang Dongke;

  • 作者单位

    Univ Western Australia, Ctr Energy M473, 35 Stirling Highway, Crawley, WA 6009, Australia;

    Univ Western Australia, Ctr Energy M473, 35 Stirling Highway, Crawley, WA 6009, Australia;

    Univ Western Australia, Ctr Energy M473, 35 Stirling Highway, Crawley, WA 6009, Australia;

    Univ Western Australia, Ctr Energy M473, 35 Stirling Highway, Crawley, WA 6009, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    algae; biochar; combustion; ignition; rheology; slurry fuels;

    机译：藻类;生物炭;燃烧;点火;流变学;浆状燃料;

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