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| 1 | Euler-Lagrange/DEM simulation of wood gasification in a bubbling fluidized bed reactor显示文摘We present an Euler–Lagrange method for the simulation of wood gasification in a bubbling fluidized bed. The gas phase is modeled as a continuum using the 2D Navier–Stokes equations and the solid phase is modeled by a Discrete Element Method(DEM)using a soft-sphere approach for the particle collision dynamic. Turbulence is included via a Large-Eddy approach using the Smagorinsky sub-grid model.The model takes into account detailed gas phase chemistry,zero-dimensional modeling of the pyrolysis and gasification of each individual particle,particle shrinkage,and heat and mass transfer between the gas phase and the particulate phase.We investigate the influence of wood feeding rate and compare exhaust gas compositions and temperature results obtained with the model against experimental data of a laboratory scale bubbling fluidized bed reactor. | Michael Oevermann Stephan Gerber Frank Behrendt | 2009 | Particuology2009，7，4： | 15 |
| 2 | Evaluation of strategies for the subsequent use of CO_(2)显示文摘If substantial amounts of CO_(2),which according to actual scenarios may in the future be captured from industrial processes and power generation,shall be utilized effectively,scalable energy efficient technologies will be required.Thus,a survey was performed to assess a large variety of applications utilizing CO_(2) chemically(e.g.,production of synthesis-gas,methanol synthesis),biologically(e.g.,CO_(2) as fertilizer in green houses,production of algae),or physically(enhancement of fossil fuel recovery,use as refrigerant).For each of the processes,material and energy balances were set up.Starting with pure CO_(2) at standard conditions,expenditure for transport and further process specific treatment were included.Based on these calculations,the avoidance of greenhouse gas emissions by applying the discussed technologies was evaluated.Based on the currently available technologies,applications for enhanced fossil fuel recovery turn out to be most attractive regarding the potential of utilizing large quantities of CO_(2)(total capacity>1000 Gt CO_(2))and producing significant amounts of marketable products on one hand and having good energy and material balances on the other hand(t_(CO_(2)-emitted)/t_(CO_(2)-utilized)<0.2-0.4).Nevertheless,large scale chemical fixation of CO_(2)providing valuable products like fuels is worth considering,if carbon-free energy sources are used to provide the process energy and H2 being essential as a reactant in a lot of chemical processes(e.g.,production of DME:t_(CO_(2)-emitted)/t_(CO_(2)-utilized)>0.34).Biological processes such as CO_(2) fixation using microalgae look attractive as long as energy and CO_(2) balance are considered.However,the development of effective photobioreactors for growing algae with low requirements for footprint area is a challenge. | Marc SCHAEFER Frank BEHRENDT Thomas HAMMER | 2010 | Frontiers of Chemical Science and Engineering2010，4，2： | 2 |
| 3 | Gas separation using porous cement membrane显示文摘Gas separation is a key issue in various industrial fields. Hydrogen has the potential for application in clean fuel technologies. Therefore, the separation and purification of hydrogen is an important research subject. CO2 capture and storage have important roles in 'green chemistry'. As an efective clean technology, gas separation using inorganic membranes has attracted much attention in the last several decades. Membrane processes have many applications in the field of gas separation. Cement is one type of inorganic material, with the advantages of a lower cost and a longer lifespan. An experimental setup has been created and improved to measure twenty diferent cement membranes. The purpose of this work was to investigate the influence of gas molecule properties on the material transport and to explore the influence of operating conditions and membrane composition on separation efciency. The influences of the above parameters are determined, the best conditions and membrane type are found, it is shown that cementitious material has the ability to separate gas mixtures, and the gas transport mechanism is studied. | Weiqi Zhang Maria Gaggl Gregor J.G.Gluth Frank Behrendt | 2014 | Journal of Environmental Sciences2014，26，1： | 2 |
| 4 | Experimental investigation of natural smoldering of char granules in a packed bed显示文摘 | He Fang Behrendt Frank | 2011 | Fire Safety Journal2011，，46： | 1 |
| 5 | Direct liquefaction of biomass显示文摘 | Behrendt Frank Neubauer York Oevermann Michael | 2008 | Chemical Engineering and Technology2008，31，5： | 1 |
| 6 | Influence of small-scale turbulence and large-scale mixing on phytoplankton primary production显示文摘 | Frank Gervais Dieter Opitz Horst Behrendt | 1997 | Hydrobiologia1997，，0： | 1 |
| 7 | A new method for simulating the combustion of a large biomass particle—A combination of a volume reaction model and front reaction approximation显示文摘 | Fang He Frank Behrendt | 2011 | Combustion and Flame2011，，12： | 1 |
| 8 | Experimental investigation of natural smoldering of char granules in a packed bed显示文摘 | Fang He Frank Behrendt | 2011 | Fire Safety Journal2011，，7： | 1 |
| 9 | 玉米秸炭低温燃烧热效应及燃尽时间实验显示文摘秸秆炭低温燃烧可抑制灰中的钾、钠、氯等的逸出,减少结渣、沾污和气相颗粒物的排放。为明确低温下炭氧化过程主要特性,采用同步热分析仪对玉米秸炭进行了实验。根据热流及失重速率曲线,确定了玉米秸炭低温燃烧温度范围,分析了燃烧温度、空气流量、堆积尺寸对CO/CO_(2)值的影响,计算了动力学参数、堆积燃烧速率(燃尽时间)。结果表明:玉米秸炭低温燃烧可采用500~680℃;CO/CO_(2)值随温度的升高先增加后减小,增大空气流量、减小堆积尺寸均会降低CO/CO_(2)值;秸秆炭动力燃烧时,在500、550、600、650℃下转化90%时所需时间分别为6.8、2.2、0.8、0.3 min。堆积燃烧时,500~680℃内,200 mL/min空气流量下,3、5、8 mg炭燃尽时间分别为15、18、25 min。以上结论可为玉米秸炭低温燃烧设备的设计提供依据。 | 李湘杰 闫升太 李成宇 BEHRENDT Frank 蔡均猛 何芳 | 2022 | 山东理工大学学报(自然科学版)2022，36，2： | 0 |
| 10 | 炭棒与生物质棒稳态阴燃特性对比显示文摘为研究炭与生物质稳态阴燃的特性差异,对不同直径(2~8mm)的炭棒与绝干、空干生物质棒竖直向下的阴燃进行了试验,并编写程序计算了棒状燃料阴燃过程的耗氧速率。结果表明:(1)所制炭棒与生物质棒均能自行调节反应区形状以维持稳态阴燃。(2)炭棒的阴燃传播速度约为生物质棒的4.2倍,最高温度比生物质棒高约50℃,反应区长度约为相应生物质棒的3.8倍,燃料消耗速率约为生物质棒的2.4倍。(3)计算和试验烟气轮廓吻合较好,炭棒耗氧速率约为生物质棒的3.4倍。研究结果可为稳态阴燃机理的深入研究及应用中燃料选择提供参考。 | 赵文涛 张毅 于光鑫 FRANK Behrendt 何芳 | 2023 | 农业工程学报2023，39，8： | 0 |
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