GASIFICATION OF CHAR FROM DRIED SEWAGE SLUDGE WITH STEAM AND CO_2 IN FLUIDIZED BED

机译：流化床中含蒸汽和CO_2的污泥干化焦的气化。

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Kinetics of gasification of char obtained from dried sewage sludge (DSS) with steam and CO_2 havernbeen measured in a laboratory fluidized bed (FB) reactor at temperatures between 800 and 950 ℃ with steam andrnCO_2. Char was generated in situ in N_2 atmosphere, which is important since cooling of char significantly influencesrnits reactivity. The reaction with steam was found to be three to four times faster than the reaction with CO_2 dependingrnon the operating temperature. Activation energies were determined for the two reactions. The reactivities with steamrnand CO_2 were found to decrease with increasing char conversion.

机译：在实验室流化床（FB）反应器中，在800至950℃的温度下，用蒸汽和CO_2对从干污泥（DSS）中获得的蒸汽和CO_2气化的动力学进行了测量。炭是在N_2气氛中原位生成的，这很重要，因为炭的冷却会显着影响其反应性。根据工作温度，发现与蒸汽的反应比与CO_2的反应快三到四倍。确定了两个反应的活化能。发现与蒸汽和CO_2的反应性随焦炭转化率的增加而降低。

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《18th European biomass conference : From research to industry and markets》|2010年|624-627|共4页
会议地点 Lyon(FR)
作者
S. Nilsson; G. Claro; A. Gómez-Barea; D. Fuentes-Cano; P. Ollero;
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Bioenergy Group. Chemical and Environmental Engineering Department. Escuela Superior de Ingenieros (University of Seville) Camino de los Descubrimientos s. 41092 Seville (Spain) Tel.: +34 954 481391 Fax: +34 954 461775 E-mail: sln@esi.us.es;

Bioenergy Group. Chemical and Environmental Engineering Department. Escuela Superior de Ingenieros (University of Seville) Camino de los Descubrimientos s. 41092 Seville (Spain);

Bioenergy Group. Chemical and Environmental Engineering Department. Escuela Superior de Ingenieros (University of Seville) Camino de los Descubrimientos s. 41092 Seville (Spain);

Bioenergy Group. Chemical and Environmental Engineering Department. Escuela Superior de Ingenieros (University of Seville) Camino de los Descubrimientos s. 41092 Seville (Spain);

Bioenergy Group. Chemical and Environmental Engineering Department. Escuela Superior de Ingenieros (University of Seville) Camino de los Descubrimientos s. 41092 Seville (Spain);

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1. Gasification of char from dried sewage sludge in fluidized bed: Reaction rate in mixtures of CO_2 and H_2O [J] . Susanna Nilsson, Alberto Gomez-Barea, Pedro Ollero Fuel . 2013,第MARa期

机译：流化床干污泥中焦炭的气化：CO_2和H_2O混合物中的反应速率
2. Product gas composition for steam-oxygen fluidized bed gasification of dried sewage sludge, straw pellets and wood pellets and the influence of limestone as bed material [J] . Schmid M., Beirow M., Schweitzer D., Biomass & bioenergy . 2018,第OCTa期

机译：干式污水污泥，秸秆颗粒和木质颗粒的蒸汽-氧气流化床气化的产物气体组成以及石灰石作为床层材料的影响
3. Gasification reactivity of char from dried sewage sludge in a.fluidized bed [J] . Susanna Nilsson, Alberto Gomez-Barea, Diego Fuentes Cano Fuel . 2012,第1期

机译：流化床中干污泥焦炭的气化反应性
4. GASIFICATION OF CHAR FROM DRIED SEWAGE SLUDGE WITH STEAM AND CO_2 IN FLUIDIZED BED [C] . S. Nilsson, G. Claro, A. Gómez-Barea, European biomass conference . 2010

机译：从干燥污水污泥与蒸汽和CO_2在流化床中的气化
5. Low Temperature Drying of Sewage Sludge Using a Fluidized Bed Dryer [D] . Matheus, Mike 2011

机译：使用流化床干燥机对污水污泥进行低温干燥
6. An Experimental Investigation of Sewage Sludge Gasification in a Fluidized Bed Reactor [O] . L. F. Calvo, A. I. García, M. Otero 2013

机译：流化床反应器中污泥气化的实验研究
7. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

机译：本文提供了一个新的数值模型，该模型描述了暴露于高太阳热通量（高于1 / MW / m2）的热厚木材样品的行为。基于无量纲数的初步研究用于对问题进行分类并支持模型构建假设。然后，提出了一种基于质量，动量和能量平衡方程的模型。这些方程式与液体蒸汽干燥模型和假物种生物质降解模型耦合。通过与以前的实验研究进行比较，初步结果表明，这些方程不足以准确预测高太阳热通量下的生物量行为。的确，在样品暴露的表面上形成了充当辐射屏蔽层的炭层。除了这套经典的方程式之外，还必须考虑到辐射向介质的渗透。此外，由于生物质中含有水，因此还必须在炭蒸气汽化后进行连续的介质变形。最后，通过添加这两种策略，该模型能够在一定范围的样品初始水分含量下暴露于高辐射热通量的情况下，正确捕获生物质的降解。还得出了在高太阳热通量下生物量行为的其他见解。样品内部同时存在干燥，热解和气化前沿。这三个热化学前沿的共存会导致样品干燥产生的蒸汽产生焦炭气化，这是介质烧蚀的主要现象。

GASIFICATION OF CHAR FROM DRIED SEWAGE SLUDGE WITH STEAM AND CO_2 IN FLUIDIZED BED

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