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Biomass steam gasification - Mathematical modeling of an innovative pressurized gasification process

机译：生物质蒸汽气化-创新的加压气化过程的数学模型

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The interest on biomass utilization has been enhanced in recent years. Especially the production of so called Secondary Generation Fuels (SGF), like Substitute Natural Gas (SNG) has been focus of research and development. With the Biomass-Heatpipe-Reformer (HPR), an innovative pressurized allothermal gasification technology, a hydrogen-rich product gas can be generated, which is well suitable for production of SNG. A robust and flexible mathematical model of the HPR was developed and implemented into commercial simulation software within this work. Based on this model the thermo-chemical conversion process of solid biomass in the HPR was analyzed. The operating parameters reactor temperature and pressure as well as mean residence time were varied and their influence on amount and composition of residue char was determined. Further an efficiency diagram, characterizing the operation state of the HPR, was created.

机译：近年来，人们对生物质利用的兴趣日益增强。尤其是所谓的第二代燃料（SGF）的生产，例如替代天然气（SNG），已成为研究和开发的重点。利用生物质-热管-重整器（HPR），一种创新的加压变热气化技术，可以产生富氢的产品气，非常适合于SNG的生产。在这项工作中，开发了强大而灵活的HPR数学模型，并将其实施到商业仿真软件中。基于该模型，分析了HPR中固体生物质的热化学转化过程。改变反应器温度和压力以及平均停留时间的操作参数，并确定它们对残炭的量和组成的影响。进一步创建了一个效率图，描述了HPR的运行状态。

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《Recent researches in mechanics》|2011年|p.66-71|共6页
会议地点 Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR)
作者
Thomas Groebl; Heimo Walter; Markus Haider;
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作者单位

Vienna University of Technology, Institute for Energy Systems and Thermodynamics, Getreidemarkt 9/302, A-1060 Vienna, Austria;

Vienna University of Technology, Institute for Energy Systems and Thermodynamics, Getreidemarkt 9/302, A-1060 Vienna, Austria;

Vienna University of Technology, Institute for Energy Systems and Thermodynamics, Getreidemarkt 9/302, A-1060 Vienna, Austria;

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会议组织
原文格式 PDF
正文语种 eng
中图分类机械制造工艺;
关键词
biomass gasification; biomass-heatpipe-reformer; mathematical modeling; sensitivity analysis; substitute natural gas;

机译：生物质气化；生物质热管重整器；数学建模；敏感性分析;替代天然气;

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1. Modeling of the Gas Steam Cycle Integrated with Biomass Pressurized Gasification [J] . T. CHMIELNIAK, S. LEPSZY Archivum Combustionis . 2008,第1a2期

机译：结合生物质加压气化的燃气蒸汽循环模型
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机译：氢气生产生物质气化过程的能量和漏极分析及优化（基于空气，蒸汽和空气/蒸汽气化剂）
3. Reaction kinetics and producer gas compositions of steam gasification of coal and biomass blend chars, part 2: Mathematical modelling and model validation [J] . Xu Q., Pang S., Levi T. Chemical Engineering Science . 2011,第10期

机译：煤和生物质混合焦的蒸汽气化反应动力学和产气成分，第2部分：数学建模和模型验证
4. Biomass steam gasification - Mathematical modeling of an innovative pressurized gasification process [C] . Thomas Grobl, Heimo Walter, Markus Haider International Conference on Fluid Mechanics and Heat and Mass Transfer . 2011

机译：生物质蒸汽气化 - 创新加压气化过程的数学建模
5. Performance of a pilot-scale, steam-blown, pressurized fluidized bed biomass gasifier. [D] . Sweeney, Daniel Joseph. 2012

机译：中试规模，蒸汽吹制，加压流化床生物质气化炉的性能。
6. Novel Model for the Release and Condensation of Inorganicsfor a Pressurized Fluidized-Bed Gasification Process: Effects of GasificationTemperature [O] . Wei Wan, *, Klas Engvall, 2018

机译：无机物释放和冷凝的新模型加压流化床气化工艺：气化的影响温度
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。

Biomass steam gasification - Mathematical modeling of an innovative pressurized gasification process

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