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Technoeconomic Analysis of Microalgae Cofiring Process for Fossil Fuel-Fired Power Plants

机译:火力发电厂微藻共烧工艺的技术经济分析

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摘要

The concept of cofiring (algal biomass burned together with coal or natural gas in existing utility power boilers) includes the utilization of CO_2 from power plant for algal biomass culture and oxycombustion of using oxygen generated by biomass to enhance the combustion efficiency. As it reduces CO_2 emission by recycling it and uses less fossil fuel, there are concomitant benefits of reduced greenhouse gas (GHG) emissions. The byproducts (oxygen) of microalgal biomass can be mixed with air or recycled flue gas prior to combustion, which will have the benefits of lower nitrogen oxide concentration in flue gas, higher efficiency of combustion, and not too high temperature (avoided by available construction materials) resulting from coal combustion in pure oxygen. A technoeconomic analysis of microalgae cofiring process for fossil fuel-fired power plants is studied. A process with closed photobioreactor and artificial illumination is evaluated for microalgae cultivation, due to its simplicity with less influence from climate variations. The results from this process would contribute to further estimation of process performance and investment. Two case studies show that there are average savings about $0,264 million/MW/yr and $0,203 million/MW/yr for coal-fired and natural gas-fired power plants, respectively. These cost savings are economically attractive and demonstrate the promise of microalgae technology for reducing GHG emission from fossil fuel-fired power plants.
机译:共燃的概念(在现有的电站锅炉中与煤或天然气一起燃烧的藻类生物质)包括利用发电厂的CO_2进行藻类生物质培养,以及利用生物质产生的氧气进行氧燃烧以提高燃烧效率。由于它通过回收利用来减少CO_2排放并减少化石燃料的使用,因此减少了温室气体(GHG)的排放。微藻生物质的副产物(氧气)可在燃烧前与空气或循环烟气混合,这具有烟气中一氧化氮浓度较低,燃烧效率更高且温度不太高的优点(可利用的结构避免)材料)是由煤在纯氧中燃烧产生的。研究了化石燃料发电厂微藻类共烧过程的技术经济分析。由于其简单性且受气候变化的影响较小,因此评估了具有封闭式光生物反应器和人工照明的工艺用于微藻培养。该过程的结果将有助于进一步估计过程性能和投资。两项案例研究表明,燃煤电厂和天然气电厂分别平均节省约0.264亿美元/兆瓦/年和0.203亿美元/兆瓦/年。这些节省的成本在经济上具有吸引力,并证明了微藻技术有望减少化石燃料发电厂的温室气体排放。

著录项

  • 来源
    《Journal of Energy Resources Technology》 |2011年第1期|p.8-15|共8页
  • 作者

    Jian Ma; Oliver Hemmers;

  • 作者单位

    Department of Mechanical Engineering and Harry Reid Center for Environmental Studies,University of Nevada, Las Vegas,4505 Maryland Parkway,Box 4009,Las Vegas, NV 89154;

    Harry Reid Center for Environmental Studies,University of Nevada, Las Vegas,4505 Maryland Parkway,Box 4009,Las Vegas, NV 89154;

  • 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

    microalgae; biomass; cofiring process; technoeconomic analysis;

    机译:微藻;生物质;共烧过程;技术经济分析;
  • 入库时间 2022-08-18 00:30:13

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