气体PVTxCO2的特性-N2O二元混合物:实验和模拟
Ruiting Suo1, Shide Mao1, Xunli Shi2
1School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China.
ACS omega
|March 10, 2025
概括
这项研究测量了二氧化碳-氧化 (CO2-N2O) 混合物的压力-体积-温度组成 (PVTx) 数据. 开发了一种新的状态方程,以预测碳捕获和储存 (CCS) 条件下的二氧化碳储存能力.
科学领域:
- 热力学是一种热力学.
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 人为温室气体如二氧化碳和二氧化对气候变化至关重要.
- 在相关的碳捕获和储存 (CCS) 条件下,对于CO2-N2O混合物存在有限的实验PVTx数据.
- 毒性问题限制了可用的CO2-N2O混合物的实验数据.
研究的目的:
- 测量CO2-N2O混合物的PVTx数据,温度为298.15至473.15K,压力为1.0至100.0bar.
- 为CO2-N2O混合物开发一个Helmholtz自由能量状态方程 (EOS).
- 准确预测N2O杂质对CCS中二氧化碳储存能力的影响.
主要方法:
- 使用恒定体积蒸汽相密度装置进行PVTx测量.
- 收集了0.6:0.4和0.8:0.2.2的摩尔比率的CO2-N2O混合物的数据.
- 根据实验数据开发了一个赫尔姆霍尔茨自由能量状态方程 (EOS).
主要成果:
- 实验密度测量显示相对标准不确定性在0.15%到0.35%之间.
- 开发的EOS准确地复制了CO2-N2O流体混合物的PVTx特性.
- 密度最初下降,然后随着N2O含量上升而增加,随着温度下降,随着压力增加.
结论:
- 开发的EOS提供了一个可靠的工具,用于估计含有N2O杂质的二氧化碳储存能力.
- 了解CO2-N2O混合物特性对于优化CCS过程至关重要.
- 这项研究解决了CCS应用中CO2-N2O混合物的关键数据缺口.
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