Daniel Lozano-Martín, Fatemeh Pazoki, Heinrich Kipphardt, Peyman Khanipour, Dirk Tuma, Alfonso Horrillo, César R. Chamorro
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In this work, we present experimental density data for an\n11-compound high-calorific (hydrogen-free) natural gas mixture and for two\nderived hydrogen-enriched natural gas mixtures prepared by adding (10 and 20)\nmol-% of hydrogen to the original standard natural gas mixture. The three\nmixtures were prepared gravimetrically according to ISO 6142-1 for maximum\nprecision in their composition and thus qualify for reference materials. A\nsingle-sinker densimeter was used to determine the density of the mixtures from\n(250-350) K and up to 20 MPa. The experimental density results of this work\nhave been compared to the densities calculated by three different reference\nequations of state for natural gas related mixtures: the AGA8-DC92 EoS, the\nGERG-2008 EoS, and an improved version of the GERG-2008 EoS. While relative\ndeviations of the experimental density data for the hydrogen-free natural gas\nmixture are always within the claimed uncertainty of the three considered\nequations of state, larger deviations can be observed for the hydrogen-enriched\nnatural gas mixtures from any of the three equations of state, especially for\nthe lowest temperature and the highest pressures.","PeriodicalId":501304,"journal":{"name":"arXiv - PHYS - Chemical Physics","volume":"8 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Thermodynamic ($p,ρ,T$) characterization of a reference high-calorific natural gas mixture when hydrogen is added up to 20 % (mol/mol)\",\"authors\":\"Daniel Lozano-Martín, Fatemeh Pazoki, Heinrich Kipphardt, Peyman Khanipour, Dirk Tuma, Alfonso Horrillo, César R. 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引用次数: 0
摘要
在热能和电力供应逐步去碳化的过程中,向天然气电网注入氢气是一种替代方法。在处理富氢天然气混合物时,应使用多组分参考混合物的高精度实验热物理数据来验证惯常用于天然气的状态参考方程的性能,并尽可能降低成分的不确定性。在这项工作中,我们展示了 11 种高热量(无氢)天然气混合物的实验密度数据,以及在原始标准天然气混合物中加入(10 和 20)摩尔-% 的氢而制备的两种富氢天然气混合物的实验密度数据。这三种混合物都是根据 ISO 6142-1 以重力法制备的,以保证其成分的最大精确性,因此符合标准物质的要求。使用单沉式密度计测定了混合物在(250-350)K 和高达 20 MPa 下的密度。这项工作的实验密度结果与天然气相关混合物的三种不同参考状态方程计算的密度进行了比较:AGA8-DC92 EoS、GERG-2008 EoS 和 GERG-2008 EoS 的改进版。虽然无氢天然气混合物的实验密度数据的相关偏差始终在三个参考状态方程的声称不确定性范围内,但可以观察到富氢天然气混合物与三个状态方程中任何一个的偏差都较大,尤其是在最低温度和最高压力下。
Thermodynamic ($p,ρ,T$) characterization of a reference high-calorific natural gas mixture when hydrogen is added up to 20 % (mol/mol)
The injection of hydrogen into the natural-gas grid is an alternative during
the process of a gradual decarbonization of the heat and power supply. When
dealing with hydrogen-enriched natural gas mixtures, the performance of the
reference equations of state habitually used for natural gas should be
validated by using high-precision experimental thermophysical data from
multicomponent reference mixtures prepared with the lowest possible uncertainty
in composition. In this work, we present experimental density data for an
11-compound high-calorific (hydrogen-free) natural gas mixture and for two
derived hydrogen-enriched natural gas mixtures prepared by adding (10 and 20)
mol-% of hydrogen to the original standard natural gas mixture. The three
mixtures were prepared gravimetrically according to ISO 6142-1 for maximum
precision in their composition and thus qualify for reference materials. A
single-sinker densimeter was used to determine the density of the mixtures from
(250-350) K and up to 20 MPa. The experimental density results of this work
have been compared to the densities calculated by three different reference
equations of state for natural gas related mixtures: the AGA8-DC92 EoS, the
GERG-2008 EoS, and an improved version of the GERG-2008 EoS. While relative
deviations of the experimental density data for the hydrogen-free natural gas
mixture are always within the claimed uncertainty of the three considered
equations of state, larger deviations can be observed for the hydrogen-enriched
natural gas mixtures from any of the three equations of state, especially for
the lowest temperature and the highest pressures.