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Analysis of Hydrogen Generation through Thermochemical Gasification of Coconut Shell Using Thermodynamic Equilibrium Model Considering Char and Tar

机译：考虑焦炭和焦油的热力学平衡模型分析椰子壳热化学气化制氢

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This work investigates the potential of coconut shell for air-steam gasification using thermodynamic equilibrium model. A thermodynamic equilibrium model considering tar and realistic char conversion was developed using MATLAB software to predict the product gas composition. After comparing it with experimental results the prediction capability of the model is enhanced by multiplying equilibrium constants with suitable coefficients. The modified model is used to study the effect of key process parameters like temperature, steam to biomass ratio, and equivalence ratio on product gas yield, composition, and heating value of syngas along with gasification efficiency. For a steam to biomass ratio of unity, the maximum mole fraction of hydrogen in the product gas is found to be 36.14% with a lower heating value of 7.49 MJ/Nm³ at a gasification temperature of 1500 K and equivalence ratio of 0.15.

机译：这项工作使用热力学平衡模型研究了椰子壳在空气蒸汽气化中的潜力。使用MATLAB软件开发了一个考虑焦油和实际焦炭转化的热力学平衡模型，以预测产物气体的组成。与实验结果进行比较后，通过将平衡常数乘以合适的系数来增强模型的预测能力。修改后的模型用于研究关键工艺参数（例如温度，蒸汽与生物质之比和当量比）对合成气的产气收率，组成和热值以及气化效率的影响。对于蒸汽与生物质的统一比率，发现气化温度为1500 K时，产物气中氢的最大摩尔分数为36.14％，热值较低，为7.49 MJ / Nm ^{3 当量比为0.15。}

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期刊名称 International Scholarly Research Notices
作者
Shanmughom Rupesh; Chandrasekharan Muraleedharan; Palatel Arun;
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年(卷),期 2014(2014),-1
年度 2014
页码 654946
总页数 9
原文格式 PDF
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1. Analysis of Hydrogen Generation through Thermochemical Gasification of Coconut Shell Using Thermodynamic Equilibrium Model Considering Char and Tar [J] . ShanmughomRupesh, ChandrasekharanMuraleedharan, PalatelArun International Scholarly Research Notices . 2014,第8期

机译：考虑焦炭和焦油的热力学平衡模型分析椰子壳热化学气化制氢
2. Comparison of Kinetic Models for COsub2/sub Gasification of Coconut-Shell Chars: Carbonization Temperature Effects on Char Reactivity and Porous Properties of Produced Activated Carbons [J] . Chaiyot Tangsathitkulchai, Supunnee Junpirom, Juejun Katesa Engineering journal . 2013,第1期

机译：椰子壳焦炭CO _{2 气化动力学模型的比较：碳化温度对焦炭反应性和产生的活性炭的多孔性的影响}
3. Comparison of Kinetic Models for CO 2 Gasification of Coconut-Shell Chars: Carbonization Temperature Effects on Char Reactivity and Porous Properties of Produced Activated Carbons [J] . Chaiyot Tangsathitkulchai, Supunnee Junpirom, Juejun Katesa Engineering journal . 2012,第1期

机译：椰子壳炭的CO 2气化动力学模型比较：碳化温度对炭反应性和产生的活性炭的多孔性的影响
4. POSSIBLE UTILIZATION PATHWAYS OF CHAR FROM BIOMASS THERMOCHEMICAL CONVERSION: CHAR AS A CATALYTIC FILTERING MEDIUM FOR TAR CRACKING [C] . J. Ahmad, E. Cordioli, F. Patuzzi, 24th European biomass conference: setting the course for a biobased economy . 2016

机译：生物质热化学转化反应中焦炭的可能利用途径：焦炭作为焦油裂解的催化过滤介质
5. Gasification and combustion of large char particles and tar. [D] . Molintas, Henry. 2015

机译：大炭颗粒和焦油的气化和燃烧。
6. Energy recovery from human faeces via gasification: A thermodynamic equilibrium modelling approach [O] . T. Onabanjo, K. Patchigolla, S.T. Wagland, -1

机译：通过气化从人类粪便中回收能量：一种热力学平衡建模方法
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。
8. An Analysis of the Coupled Chemically Reacting Boundary Layer and Charring Ablator. Part 5 - a General Approach to the Thermochemical Solution of Mixed Equilibrium-Nonequilibrium, Homogeneous or Heterogeneous Systems [R] . Kendall, R. M. 1968

机译：化学反应边界层与炭化消融剂的耦合分析。第5部分 - 混合平衡 - 非平衡，均相或非均匀系统的热化学解的一般方法

Analysis of Hydrogen Generation through Thermochemical Gasification of Coconut Shell Using Thermodynamic Equilibrium Model Considering Char and Tar

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