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Phase Equilibrium Data for the Hydrates of Synthesized Ternary CH4/CO2/N2 Biogas Mixtures
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2017-12-19 00:00:00 , DOI: 10.1021/acs.jced.7b00823
Xiaoya Zang 1, 2, 3 , Deqing Liang 1, 2, 3
Affiliation  

To enhance the energy efficiency of biogas and reduce environmental pollution, impurities such as CO2 and N2 must be removed. In this context, hydrate-based gas separation (HBGS) is a novel technology that has been utilized in gas purification. As such, the hydrate phase equilibrium data of the CH4/CO2/N2 gas mixture are crucial for application of the HBGS process in biogas separation. This study presents our investigation into the phase equilibrium conditions for the hydrates of synthesized ternary CH4/CO2/N2 biogas mixtures. All experiments were conducted at 276.2–286.3 K and 2.59–8.84 MPa using an isochoric method with different ternary CH4/CO2/N2 gas concentrations. The results obtained herein indicated that the hydrate phase equilibrium conditions shifted to lower pressures and higher temperatures with increasing CO2 contents. In addition, with a N2 content of about 10%, the hydrate phase equilibrium data of the ternary gas mixtures approached that of pure CH4.

中文翻译:

合成三元CH 4 / CO 2 / N 2沼气混合物水合物的相平衡数据

为了提高沼气的能效并减少环境污染,必须去除诸如CO 2和N 2之类的杂质。在这种情况下,基于水合物的气体分离(HBGS)是一种已用于气体净化的新技术。因此,CH 4 / CO 2 / N 2气体混合物的水合物相平衡数据对于将HBGS工艺应用于沼气分离至关重要。本研究为合成三元CH 4 / CO 2 / N 2的水合物的相平衡条件研究提供了条件。沼气混合物。所有实验均采用等渗法,在不同的三元CH 4 / CO 2 / N 2气体浓度下,在276.2–286.3 K和2.59–8.84 MPa下进行。本文获得的结果表明,随着CO 2含量的增加,水合物相平衡条件转移到较低的压力和较高的温度。另外,在N 2含量为约10%的情况下,三元气体混合物的水合相平衡数据接近纯CH 4的水合相平衡数据。
更新日期:2017-12-19
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