Thermodynamic and transport properties of CO2, CO2–O2, and CO2–H2 mixtures at temperatures of 300 to 30,000 K and pressures of 0.1 to 10 MPa
Thermodynamic and transport properties of CO2, CO2–O2, and CO2–H2 mixtures at temperatures of 300 to 30,000 K and pressures of 0.1 to 10 MPa
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DOI：
10.1002/eej.20467
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发表时间：
2008-06
影响因子：
0.4
通讯作者：
Yasunori Tanaka;N. Yamachi;S. Matsumoto;S. Kaneko;S. Okabe;M. Shibuya
中科院分区：
文献类型：
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作者：
Yasunori Tanaka;N. Yamachi;S. Matsumoto;S. Kaneko;S. Okabe;M. Shibuya
本文给出了温度为300 ~ 30000 K、压力为0.1 ~ 10 MPa热平衡条件下CO2、CO2 - o2混合物、CO2 - h2混合物的热力学和输运性质的理论计算结果。二氧化碳气体是断路器中环保灭弧介质的候选材料之一。此外，本文还研究了附加气体O2和H2对CO2热力学和输运性质的影响。包含CO2的氢原子类似于开关器件中的聚合物烧蚀蒸汽。首先，通过Gibbs自由能最小化法计算CO2、CO2 - o2混合物、CO2 - h2混合物的平衡组成；其次，利用计算出的组分计算热力学性质。最后，利用物种间的碰撞积分，利用Chapman - Enskog方法的一阶近似计算了输运性质。H2的加入增加了CO2在3000 ~ 6000 K范围内的电导率，因为在该温度范围内产生的CHO分子由于CHO的较低电离电位而发射出更多的电子。它还增加了CO2的导热性，特别是由于H2在3900 K左右的解离反应和H在15,000 K左右的电离反应。这里提供的这些特性可用于CO2热等离子体模拟。©2008 Wiley期刊公司电气工程学报，163(4):18-29,2008；在线发表于Wiley InterScience （www.interscience）。wiley.com)。DOI 10.1002 / eej.20467
This paper provides the theoretical calculation results of thermodynamic and transport properties of CO2, CO2–O2 mixture, CO2–H2 mixture under thermal equilibrium condition at temperatures of 300 to 30,000 K and at pressures of 0.1 to 10 MPa. The gas CO2 is one of the candidates for the environmentally benign arc‐quenching medium in a circuit breaker. Furthermore, the effect of additional gases O2 and H2 on the thermodynamic and transport properties of CO2 was also investigated in this paper. The hydrogen atom included CO2 is similar to the polymer ablated vapor in switching devices. First, equilibrium compositions of CO2, CO2–O2 mixture, CO2–H2 mixture were calculated through the Gibbs free energy minimization method. Second, thermodynamic properties were computed using the calculated composition. Finally, transport properties were calculated by the first‐order approximation of Chapman– Enskog method using the collision integrals between species. Inclusion of H2 increases the electrical conductivity of CO2 in the range 3000 to 6000 K because CHO molecules produced in this temperature range emit more electrons due to the lower ionization potential of CHO. It also increases the thermal conductivity of CO2 especially due to dissociation reactions of H2 around 3900 K and ionization of H around 15,000 K. These properties provided here can be used for CO2 thermal plasma simulation. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 163(4): 18–29, 2008; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/eej.20467