“双碳”背景下,随着碳捕集与封存技术逐步被应用于燃煤机组中,碳捕集-电转气(carbon capture-power to gas,CC-P2G)的耦合特性对电-气互联系统(integrated electricity and gas system,IEGS)安全可靠性的影响不可忽视。为评估该影响,...“双碳”背景下,随着碳捕集与封存技术逐步被应用于燃煤机组中,碳捕集-电转气(carbon capture-power to gas,CC-P2G)的耦合特性对电-气互联系统(integrated electricity and gas system,IEGS)安全可靠性的影响不可忽视。为评估该影响,基于耦合设备变工况精细化模型,提出了考虑CC-P2G耦合特性的IEGS连锁故障评估方法。首先,将电转气过程划分为电解水和甲烷化,并将碳捕集系统中的二氧化碳参与甲烷化,建立CC-P2G变工况精细化模型;同时,考虑详细的气转电过程建立燃气轮机变工况精细化模型。然后,根据电能和天然气流动惯性差异,分别建立基于直流潮流的电力系统连锁故障模型和基于动态潮流的天然气系统连锁故障模型,协同模拟IEGS连锁故障。最后,从拓扑完整性与物理运行特性角度建立评估指标,分别对电力系统与天然气系统受到的连锁故障影响进行量化评估。利用IEEE 39节点系统和29节点天然气系统构建电-气互联测试系统,验证所提方法的有效性。展开更多
Recently, a kind of hybrid solution MEA-methanol shows a better CO_2 capture performance over aqueous MEA solution. However, the vaporization of methanol is the biggest disadvantage that hinders its application, so it...Recently, a kind of hybrid solution MEA-methanol shows a better CO_2 capture performance over aqueous MEA solution. However, the vaporization of methanol is the biggest disadvantage that hinders its application, so it is necessary to minimize the vaporization of methanol during both the absorption and regeneration processes. In this work, two kinds of hybrid solutions were studied and compared with aqueous MEA solution and MEA-methanol solution, including MEA/TEA/methanol solution and MEA/glycerol/methanol solution. The absorption property of MEA/glycerol/methanol solution is better than aqueous MEA solution within a certain period of time and the absorption property of MEA/TEA/methanol solution is too poor to be used in CO_2 capture. By increasing the concentration of TEA and decreasing the concentration of MEA, the absorption rate, CO_2 capture efficiency and absorption capacity all decreased. Upon adding glycerol, the cyclic capacity decreased and the generation temperature increased, and moreover, the density and viscosity also increased considerably. So after adding TEA and glycerol, the CO_2 capture performance of MEAmethanol solvent cannot be improved.展开更多
文摘“双碳”背景下,随着碳捕集与封存技术逐步被应用于燃煤机组中,碳捕集-电转气(carbon capture-power to gas,CC-P2G)的耦合特性对电-气互联系统(integrated electricity and gas system,IEGS)安全可靠性的影响不可忽视。为评估该影响,基于耦合设备变工况精细化模型,提出了考虑CC-P2G耦合特性的IEGS连锁故障评估方法。首先,将电转气过程划分为电解水和甲烷化,并将碳捕集系统中的二氧化碳参与甲烷化,建立CC-P2G变工况精细化模型;同时,考虑详细的气转电过程建立燃气轮机变工况精细化模型。然后,根据电能和天然气流动惯性差异,分别建立基于直流潮流的电力系统连锁故障模型和基于动态潮流的天然气系统连锁故障模型,协同模拟IEGS连锁故障。最后,从拓扑完整性与物理运行特性角度建立评估指标,分别对电力系统与天然气系统受到的连锁故障影响进行量化评估。利用IEEE 39节点系统和29节点天然气系统构建电-气互联测试系统,验证所提方法的有效性。
基金supported by the Sinopec Ningbo Engineering Co., Ltd. (No. 14850000-14-ZC0609-0003, H8XY-0032)
文摘Recently, a kind of hybrid solution MEA-methanol shows a better CO_2 capture performance over aqueous MEA solution. However, the vaporization of methanol is the biggest disadvantage that hinders its application, so it is necessary to minimize the vaporization of methanol during both the absorption and regeneration processes. In this work, two kinds of hybrid solutions were studied and compared with aqueous MEA solution and MEA-methanol solution, including MEA/TEA/methanol solution and MEA/glycerol/methanol solution. The absorption property of MEA/glycerol/methanol solution is better than aqueous MEA solution within a certain period of time and the absorption property of MEA/TEA/methanol solution is too poor to be used in CO_2 capture. By increasing the concentration of TEA and decreasing the concentration of MEA, the absorption rate, CO_2 capture efficiency and absorption capacity all decreased. Upon adding glycerol, the cyclic capacity decreased and the generation temperature increased, and moreover, the density and viscosity also increased considerably. So after adding TEA and glycerol, the CO_2 capture performance of MEAmethanol solvent cannot be improved.
