Viscosity Measurement of Hydrogen-Methane Mixed Gas for Future Energy Systems
Viscosity Measurement of Hydrogen-Methane Mixed Gas for Future Energy Systems
复制标题
未来能源系统中氢气-甲烷混合气体的粘度测量
DOI：
10.1299/jtst.2.236
复制
发表时间：
2007
影响因子：
1.2
通讯作者：
M. Hirata
中科院分区：
文献类型：
--
作者：
Y. Kobayashi;A. Kurokawa;M. Hirata
为了减少二氧化碳的排放，2004年5月，欧盟（EU）开始了一项被称为“自然项目”的实验方法，通过将氢气与管道中现有的高压天然气混合来输送氢气。天然氢代表氢和天然气的混合物。换句话说，这种气体也被称为乙烷，是氢和甲烷的缩写。“hythane”是美国Hydrogen Consulting Inc.的注册商标。为什么天然气会变得越来越重要？人们普遍认为氢能社会的突然实现是不可能的。通常假设甲烷作为能量载体的现状逐渐转变为氢-甲烷混合气体状态，最后变为100%氢。这就是为什么作者研究这种混合物的性质。该研究被认为是首次测量了氢-甲烷混合气体粘度的温度依赖性。为了测量粘度，作者采用毛细管法测量管道层流中的压降。在电抛光、超清洁和光滑的管中进行，并使用电容压力计仔细测量上游和下游之间的压降。为了消除温度依赖性的影响，将管置于恒温浴中，整个实验研究过程中温度波动保持在±0.3°C。在20 ~ 70℃的温度范围内，得到了氢-甲烷混合气体的粘度。
In order to reduce the CO2 emission, in May 2004, the European Union (EU) started an experimental approach known as the “naturalhy Project” in order to transport hydrogen by mixing it with the existing high-pressure natural gas in the pipelines. Naturalhy represents a mixture of hydrogen and natural gas. In other words, this gas is also known as hythane, which is an abbreviation of hydrogen and methane. The name “hythane” is the registered trademark of Hydrogen Consulting Inc., USA. Why will this gas gain importance? It is generally considered that the sudden realization of a hydrogen energy society cannot take place. It is normally assumed that the present status of methane as an energy carrier gradually changes to a state of hydrogen-methane mixed gas and finally to 100% hydrogen. This is why the authors investigate the properties of this mixture. This study is considered to be the first to measure the temperature dependence of the viscosity of hydrogen-methane mixed gas. In order to measure the viscosity, the authors used a capillary method that measures the pressure drop in the laminar flow through a pipe. It was conducted in an electrically polished, ultra clean and smooth tube and the pressure drop between the upstream and downstream was carefully measured using a capacitance manometer. In order to remove the effect of temperature dependence, the tube was placed in a constant temperature bath, and the temperature fluctuation was maintained within ±0.3°C throughout this experimental study. The authors obtained the viscosity of the hydrogen-methane mixed gas within a temperature range of 20-70°C.