The equilibrium hydrate formation conditions for CO2/H2 gas mixtures with different CO2 concentrations in 0.29 mol% TBAB aqueous solution are firstly measured.The results illustrate that the equilibrium hydrate format...The equilibrium hydrate formation conditions for CO2/H2 gas mixtures with different CO2 concentrations in 0.29 mol% TBAB aqueous solution are firstly measured.The results illustrate that the equilibrium hydrate formation pressure increases remarkably with the decrease of CO2 concentration in the gas mixture.Based on the phase equilibrium data,a three stages hydrate CO2 separation from integrated gasification combined cycle （IGCC） synthesis gas is investigated.Because the separation efficiency is quite low for the third hydrate separation,a hybrid CO2 separation process of two hydrate stages in conjunction with one chemical absorption process （absorption with MEA） is proposed and studied.The experimental results show H2 concentration in the final residual gas released from the three stages hydrate CO2 separation process was approximately 95.0 mol% while that released from the hybrid CO2 separation process was approximately 99.4 mol%.Thus,the hybrid process is possible to be a promising technology for the industrial application in the future.展开更多
Gasification unit is one of the key subsystems in the IGCC power system;the operating parameters of gasifier directly affect syngas quality and performance of whole IGCC system. The system model of gasification unit w...Gasification unit is one of the key subsystems in the IGCC power system;the operating parameters of gasifier directly affect syngas quality and performance of whole IGCC system. The system model of gasification unit with coal water slurry gasifier was simulated and calculated using THERMOFLEX software, and the relations of oxygen coal ratio (Roc), water coal ratio (Rsc), gasification pressure, gasification temperature and cold gas efficiency were mostly researched. The results show that Roc and Rsc have effect of mutual restriction on gasification temperature, cold gas efficiency and syngas composition. Gasification pressure mainly determines the capacity of the gasifier, little effects on syngas composition.展开更多
近年来,褐煤提质技术的发展使得褐煤的高效利用成为可能。基于一种先进的褐煤干燥技术—内部废热利用流化床干燥(wirbelschicht-trocknung mit interner abw rmenu-tzung,WTA),采用ASPEN Plus软件及美国电力研究协会(electric power res...近年来,褐煤提质技术的发展使得褐煤的高效利用成为可能。基于一种先进的褐煤干燥技术—内部废热利用流化床干燥(wirbelschicht-trocknung mit interner abw rmenu-tzung,WTA),采用ASPEN Plus软件及美国电力研究协会(electric power research institute,EPRI)的技术评价准则(technical assessment guide,TAG),分别对烟煤整体煤气化联合循环(integrated gasification combined cycle,IGCC)电站和褐煤IGCC电站进行技术经济性分析。详细介绍了WTA单元及燃气轮机变工况的建模方法。计算结果表明,引入WTA技术后,褐煤IGCC电站的发电效率比采用传统干燥方式时约提高4.6个百分点,整体性能与烟煤IGCC电站相差不大;而褐煤IGCC电站的发电成本比烟煤IGCC电站低24.4%。高效的褐煤干燥技术能显著提高褐煤IGCC电站的效率,而褐煤低廉的价格又对降低发电成本十分有利,褐煤很可能成为比烟煤更适合IGCC的燃料。展开更多
为进一步降低从整体煤气化联合循环(IGCC)系统中捕集CO2的能耗,研究了一个集成氧离子传输膜(oxygen ion transport membrane,OTM)的富氧燃烧法低能耗捕集CO2的IGCC系统。利用Aspen Plus软件对系统进行了模拟,并对新系统与采用深冷空分...为进一步降低从整体煤气化联合循环(IGCC)系统中捕集CO2的能耗,研究了一个集成氧离子传输膜(oxygen ion transport membrane,OTM)的富氧燃烧法低能耗捕集CO2的IGCC系统。利用Aspen Plus软件对系统进行了模拟,并对新系统与采用深冷空分的富氧燃烧法捕集CO2的IGCC系统及不回收CO2的IGCC系统进行了比较研究,并分析了OTM原料侧压力、渗透侧压力以及OTM运行温度对新系统性能的影响。研究结果表明:与采用深冷空分的富氧燃烧法捕集CO2的IGCC基准系统相比,集成OTM的新系统效率高出1.88个百分点,比传统不回收CO2的IGCC系统效率下降了6.67个百分点。展开更多
基金supported by the National Natural Science Foundation of China (51076155)Science & Technology Program of Guangdong Province(2009B050600006)
文摘The equilibrium hydrate formation conditions for CO2/H2 gas mixtures with different CO2 concentrations in 0.29 mol% TBAB aqueous solution are firstly measured.The results illustrate that the equilibrium hydrate formation pressure increases remarkably with the decrease of CO2 concentration in the gas mixture.Based on the phase equilibrium data,a three stages hydrate CO2 separation from integrated gasification combined cycle （IGCC） synthesis gas is investigated.Because the separation efficiency is quite low for the third hydrate separation,a hybrid CO2 separation process of two hydrate stages in conjunction with one chemical absorption process （absorption with MEA） is proposed and studied.The experimental results show H2 concentration in the final residual gas released from the three stages hydrate CO2 separation process was approximately 95.0 mol% while that released from the hybrid CO2 separation process was approximately 99.4 mol%.Thus,the hybrid process is possible to be a promising technology for the industrial application in the future.
文摘Gasification unit is one of the key subsystems in the IGCC power system;the operating parameters of gasifier directly affect syngas quality and performance of whole IGCC system. The system model of gasification unit with coal water slurry gasifier was simulated and calculated using THERMOFLEX software, and the relations of oxygen coal ratio (Roc), water coal ratio (Rsc), gasification pressure, gasification temperature and cold gas efficiency were mostly researched. The results show that Roc and Rsc have effect of mutual restriction on gasification temperature, cold gas efficiency and syngas composition. Gasification pressure mainly determines the capacity of the gasifier, little effects on syngas composition.
文摘近年来,褐煤提质技术的发展使得褐煤的高效利用成为可能。基于一种先进的褐煤干燥技术—内部废热利用流化床干燥(wirbelschicht-trocknung mit interner abw rmenu-tzung,WTA),采用ASPEN Plus软件及美国电力研究协会(electric power research institute,EPRI)的技术评价准则(technical assessment guide,TAG),分别对烟煤整体煤气化联合循环(integrated gasification combined cycle,IGCC)电站和褐煤IGCC电站进行技术经济性分析。详细介绍了WTA单元及燃气轮机变工况的建模方法。计算结果表明,引入WTA技术后,褐煤IGCC电站的发电效率比采用传统干燥方式时约提高4.6个百分点,整体性能与烟煤IGCC电站相差不大;而褐煤IGCC电站的发电成本比烟煤IGCC电站低24.4%。高效的褐煤干燥技术能显著提高褐煤IGCC电站的效率,而褐煤低廉的价格又对降低发电成本十分有利,褐煤很可能成为比烟煤更适合IGCC的燃料。
文摘为进一步降低从整体煤气化联合循环(IGCC)系统中捕集CO2的能耗,研究了一个集成氧离子传输膜(oxygen ion transport membrane,OTM)的富氧燃烧法低能耗捕集CO2的IGCC系统。利用Aspen Plus软件对系统进行了模拟,并对新系统与采用深冷空分的富氧燃烧法捕集CO2的IGCC系统及不回收CO2的IGCC系统进行了比较研究,并分析了OTM原料侧压力、渗透侧压力以及OTM运行温度对新系统性能的影响。研究结果表明:与采用深冷空分的富氧燃烧法捕集CO2的IGCC基准系统相比,集成OTM的新系统效率高出1.88个百分点,比传统不回收CO2的IGCC系统效率下降了6.67个百分点。
