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使用化学计量热力学模型预测生物固体气化性能

Biosolid Gasification Performance Prediction Using a Stoichiometric Thermodynamic Model.

作者信息

Li Fangtian, Zhang Xin, Ji Yun

机构信息

Department of Chemical Engineering, University of North Dakota, Grand Forks, North Dakota 58202, United States.

出版信息

ACS Omega. 2024 Jul 17;9(30):32639-32650. doi: 10.1021/acsomega.4c01687. eCollection 2024 Jul 30.

DOI:10.1021/acsomega.4c01687
PMID:39100335
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11292848/
Abstract

The gasification process can recover energy from biosolids produced in wastewater treatment. This paper developed a stoichiometric thermodynamic equilibrium model for biosolid gasification based on the biosolid properties, thermodynamic database, and equilibrium constants. If the calculation result showed that the quantity of char was negative, the quantity of char was put to zero, and the simulation was carried out again. The model was first verified by woody gasification under isothermal conditions, and the influence of a given temperature on biosolid gasification was simulated. The model further investigated the effects of different feedstock types, moisture contents, equivalence ratios, and reaction extensions on the adiabatic temperature, exergy efficiency, and syngas properties under autothermal conditions. The four factors were all the main factors for adiabatic temperature. The exergy efficiency depended more on the operation conditions than on the feedstock type. The H concentration of the dry syngas in biosolid gasification exhibited a curve both against the given temperature under isothermal conditions and against the moisture content under autothermal conditions.

摘要

气化过程能够从废水处理产生的生物固体中回收能量。本文基于生物固体特性、热力学数据库和平衡常数，开发了一个用于生物固体气化的化学计量热力学平衡模型。如果计算结果显示焦炭量为负，则将焦炭量设为零，然后再次进行模拟。该模型首先在等温条件下通过木质气化进行验证，并模拟了给定温度对生物固体气化的影响。该模型进一步研究了不同原料类型、水分含量、当量比和反应程度对自热条件下绝热温度、火用效率和合成气性质的影响。这四个因素都是影响绝热温度的主要因素。火用效率更多地取决于操作条件而非原料类型。生物固体气化中干合成气的H浓度在等温条件下相对于给定温度以及在自热条件下相对于水分含量均呈现出一条曲线。

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本文引用的文献

1
Tar Formation in Gasification Systems: A Holistic Review of Remediation Approaches and Removal Methods.气化系统中的焦油形成：修复方法与去除手段的全面综述
ACS Omega. 2024 Jan 4;9(2):2060-2079. doi: 10.1021/acsomega.3c04425. eCollection 2024 Jan 16.
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