热力学和动力学对基于氨基的CO2捕获系统的碳捕获性能的影响
1Department of Chemistry, Zonguldak Bülent Ecevit University, 67100, Zonguldak, Türkiye. turkan.kopac@beun.edu.tr.
概括
计算机模拟显示,基于速率的建模显著影响碳捕获效率. 丁胺 (DEA) 在测试的氨基溶剂中表现最好,性能优于甲基丁胺 (MDEA).
科学领域:
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
- 计算化学计算化学
背景情况:
- 基于溶剂的二氧化碳 (CO2) 捕获对于燃烧后的过程至关重要,通常使用吸收器-剥离器列.
- 通常使用的是像2-amino-2-methyl-1-propanol (AMP),diethanolamine (DEA) 和methyl diethanolamine (MDEA) 这样的氨基溶剂.
- 精确的建模对于优化二氧化碳捕获效率至关重要.
研究的目的:
- 调查基于速率的建模与平衡模型对二氧化碳捕获的影响.
- 评估不同氨基溶剂 (AMP,DEA,MDEA) 在二氧化碳捕获中的性能.
- 评估热力学方法对二氧化碳捕获模拟准确性的影响.
主要方法:
- 使用Aspen Plus软件进行基于氨基的二氧化碳捕获过程的计算机模拟.
- 采用平衡和基于速率的建模方法.
- 集成的电解质NRTL模型用于热力学计算和严格的运输属性建模.
主要成果:
- 基于速率的模型被证明比平衡模型更准确,平衡模型依赖于过于简单的假设.
- 丁胺 (DEA) 显示出最高的二氧化碳捕获能力,而甲基丁胺 (MDEA) 显示出最低的.
- 灵敏度分析强调了吸入二氧化碳成分对捕获性能的显著影响.
结论:
- 基于速率的建模提供了比平衡建模更现实的评估二氧化碳捕获性能.
- 氨基溶剂的选择极大地影响了捕获效率,在本研究中,DEA是最有效的.
- 模拟方法,包括溶液化学和动力学,适用于用于捕获二氧化碳的各种溶剂系统.
相关概念视频
02:24Predicting Reaction Outcomes
8.3K
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
8.3K
03:25Free Energy Changes for Nonstandard States
11.4K
The free energy change for a process taking place with reactants and products present under nonstandard conditions (pressures other than 1 bar; concentrations other than 1 M) is related to the standard free energy change according to this equation:
where R is the gas constant (8.314 J/K·mol), T is the absolute temperature in kelvin, and Q is the reaction quotient. This equation may be used to predict the spontaneity of a process under any given set of conditions.
Reaction Quotient...
where R is the gas constant (8.314 J/K·mol), T is the absolute temperature in kelvin, and Q is the reaction quotient. This equation may be used to predict the spontaneity of a process under any given set of conditions.
Reaction Quotient...
11.4K
02:55Temperature Dependence on Reaction Rate
81.5K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
81.5K
01:16Efficiency of The Carnot Cycle
2.6K
The hypothetical Carnot cycle consists of an ideal gas subjected to two isothermal and two adiabatic processes. Since the internal energy of an ideal gas depends only on its temperature, which is the same before and after the completion of the Carnot cycle, there is no change in its internal energy. Hence, using the first law of thermodynamics, the total heat exchanged by the ideal gas equals the total work done. Thus, we can quantify the efficiency of the Carnot cycle via the heat exchanged...
2.6K
02:50Catalysis
26.9K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
26.9K
01:09Turbulent Flow: Problem Solving
113
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
113