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高浓度煤粉燃烧过程中燃料N释放特性实验研究 被引量:2
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作者 宋国良 周俊虎 岑可法 《中国电机工程学报》 EI CSCD 北大核心 2011年第8期25-30,共6页
高浓度煤粉燃烧是一种新型的洁净煤燃烧技术,具有高效低污染排放特性。在一维火焰炉与固定床反应器实验台上,对不同煤种、粒径、炉温在不同煤粉浓度下燃料N的释放特性进行了实验研究。实验结果表明:煤种不同,燃料N的释放特性差异明显。... 高浓度煤粉燃烧是一种新型的洁净煤燃烧技术,具有高效低污染排放特性。在一维火焰炉与固定床反应器实验台上,对不同煤种、粒径、炉温在不同煤粉浓度下燃料N的释放特性进行了实验研究。实验结果表明:煤种不同,燃料N的释放特性差异明显。挥发分越高,燃料N最大释放率对应的煤粉浓度越低;煤粉粒径越小,燃料N在不同煤粉浓度下的释放率越高;炉温越高,燃料N越容易释放,燃料N主要以挥发分N的形式释放出来。随着煤粉浓度的递增,NOx转化率与燃料燃尽率均呈单调递减趋势,高浓度煤粉燃烧有利于低NOx的排放,但煤粉浓度过高,对煤粉的燃尽不利。在高浓度煤粉燃烧过程中,煤粉与空气的充分混合及合理选取过量空气系数至关重要。 展开更多
关键词 一维火焰炉 高浓度煤粉 燃料释放 NOx转化率 燃料燃尽率
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Microalgae for Renewable Energy: Is it a Solution for Global Warming?
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作者 Meltem Conk Dalay 《Journal of Environmental Science and Engineering(A)》 2015年第4期161-168,共8页
Microalgae could be a new sustainable energy source substituted for petroleum. They can produce high value biodiesel, bioethanol, bio-hydrogen, biogas, and that they are able to use waste water and nutrients, allowing... Microalgae could be a new sustainable energy source substituted for petroleum. They can produce high value biodiesel, bioethanol, bio-hydrogen, biogas, and that they are able to use waste water and nutrients, allowing for integration of such processes with waste treatment. Open ponds in hectares of area, could remove excess CO2 in atmosphere with photosynthesis. Large scale microalgal production in fields which are not suitable for agriculture could be a solution for CO: capturing from the atmosphere. Sea water could be used for the culture medium not to consume the fresh water. However microalgae reduce the atmospheric CO: while producing the organic material, using the biomass for either fuel production or food, feed, fertilizer, come out with CO2 release to the atmosphere, when burned by the engine, body and/or bacterial activities. So, microalgal growth can't reduce the CO2 however makes an important contribution to keep the atmospheric CO2 level stable. Long term solution for removing the CO2, could be possible with making durable biomaterials with microalgal biomass and capture the atmospheric CO2 by fixing into the materials and interrupt the carbon cycle for a long while. 展开更多
关键词 MICROALGAE biofuel production biodiesel BIOETHANOL BIOHYDROGEN biogas.
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压水堆核电厂燃料棒大破口情形下的辐射源项特征研究 被引量:1
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作者 景福庭 吕焕文 +2 位作者 朱建平 高希龙 黄迁明 《核动力工程》 EI CAS CSCD 北大核心 2021年第S02期65-69,共5页
反应堆运行中,燃料棒出现大破口后,会引起燃料芯体材料的释放和一回路源项的明显上升,影响反应堆的安全运行。本文基于某核电厂的源项实测值进行燃料破损状态评估,分析表明堆芯燃料棒出现了大尺寸的破口,并出现了燃料的释放,与停堆后的... 反应堆运行中,燃料棒出现大破口后,会引起燃料芯体材料的释放和一回路源项的明显上升,影响反应堆的安全运行。本文基于某核电厂的源项实测值进行燃料破损状态评估,分析表明堆芯燃料棒出现了大尺寸的破口,并出现了燃料的释放,与停堆后的破损检查结果基本一致。研究表明燃料棒大破口情形下的一回路源项存在以下特征:冷却剂中^(134)I源项的持续上升;典型裂变产物的活度谱与沾污铀的活度谱相近;功率瞬变时没有明显碘峰现象;冷却剂中可以检测出^(239)Np源项。这些规律可用于反应堆的燃料破损分析,有助于及时识别出堆芯出现燃料棒大破口的情形。 展开更多
关键词 燃料破损 燃料释放 裂变产物源项
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Flame retarded polymer nanocomposites: Development,trend and future perspective 被引量:6
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作者 MA HaiYun SONG PingAn FANG ZhengPing 《Science China Chemistry》 SCIE EI CAS 2011年第2期302-313,共12页
Polymer nanocomposites are a new class of flame retarded materials which have attracted much attention and considered as a revolutionary new flame retardant approach.A very small amount of nano flame retardants (norma... Polymer nanocomposites are a new class of flame retarded materials which have attracted much attention and considered as a revolutionary new flame retardant approach.A very small amount of nano flame retardants (normally < 5 wt%) can significantly reduce the heat release rate (HRR) and smoke emission (SEA) during the combustion of polymer materials.Moreover,the addition of nano flame retardants can also improve the mechanical properties of polymer materials compared with the deterioration of traditional flame retardants.This paper reviews the recent development in the flame retardant field of polymer nanocomposites and also introduces the related research in our lab.The challenges and problems are discussed and the future development of flame retarded polymer nanocomposites is prospected. 展开更多
关键词 NANOCOMPOSITE layered silicate carbon nanotubes FULLERENE flame retardancy
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Generation of electricity from CO_2 mineralization: Principle and realization 被引量:8
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作者 XIE He Ping WANG Yu Fei +8 位作者 HE Yang GOU Ma Ling LIU Tao WANG Jin Long TANG Liang JIANG Wen ZHANG Ru XIE Ling Zhi LIANG Bin 《Science China(Technological Sciences)》 SCIE EI CAS 2014年第12期2335-2346,共12页
Current CO2 reduction and utilization technologies suffer from high energy consuming. Thus, an energy favourable route is in urgent demanding. CO2 mineralization is theoretically an energy releasing process for CO2 re... Current CO2 reduction and utilization technologies suffer from high energy consuming. Thus, an energy favourable route is in urgent demanding. CO2 mineralization is theoretically an energy releasing process for CO2 reduction and utilization, but an approach to recovery this energy has so far remained elusive. For the first time, here we proposed the principle of harvesting electrical energy directly from CO2 mineralization, and realized an energy output strategz1 for CO2 utilization and reduction via a CO2-mineralization fuel cell (CMFC) system. In this system CO2 and industrial alkaline wastes were used as feedstock, and industrial valuable NaHCO3 was produced concomitantly during the electricity generation. The highest power density of this system reached 5.5 W/m2, higher than many microbial fuel cells. The maximum open circuit voltage reached 0.452 V. Moreo- ver, this system was demonstrated viable to low concentration CO2 (10%) and other carhonation process. Thus, the existing of an energy-generating and environmentally friendly strategy to utilize CO2 as a supplement to the current scenario of CO2 emis- sion control has been demonstrated. 展开更多
关键词 CO2 mineralization electricity generation sodium bicarbonates CO2 utilization
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