CO2的孔径大小依赖的起源 在广泛的操作压力下在有孔的碳中吸附热力学
Yi Zhang1,2, Fei Sun1,2, Chaowei Yang1,2
1School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
ACS applied materials & interfaces
|December 20, 2025
概括
多孔碳吸附剂通过利用二氧化碳聚合的中孔而不是仅仅微孔,显示出增强的二氧化碳 (CO2) 捕获能力. 这一发现指导了在不同压力下有效捕获二氧化碳的先进材料的设计.
科学领域:
- 材料科学 材料科学 材料科学
- 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:
- 多孔碳是下一代二氧化碳 (CO2) 捕获的关键材料.
- 了解孔隙结构和在不同压力下二氧化碳吸附行为之间的关系对于有针对性的吸附剂设计至关重要.
- 目前的模型往往忽略了中二氧化碳吸附动态中的中二氧化碳的作用.
研究的目的:
- 为了阐明二氧化碳吸附和多尺度凝结行为在多孔碳的孔隙大小依赖的起源.
- 调查中对二氧化碳储存和聚合在广泛的压力范围内的影响.
- 引导开发先进的碳吸收剂,用于高吸收的二氧化碳捕获.
主要方法:
- 使用模型碳吸附剂,精确控制孔径分布的实验研究.
- 对二氧化碳吸附热力学的分子水平计算.
- 在广泛的压力范围 (0.04至30巴) 中分析二氧化碳吸附行为.
主要成果:
- 二氧化碳的吸附和聚合发生在原子 (微孔) 和介质层 (大约. 10纳米) 的尺度.
- 半孔促进二氧化碳分子受限的流动和聚合,形成一个独特的二氧化碳集群阶段.
- 半孔碳吸附剂在更高的压力下显示出CO2吸附能力异常增强.
- 发育的富含美索的活性炭显示了高的二氧化碳吸收率 (23.2 mmol g-1在20 bar).
结论:
- 这项研究揭示了一种新的二氧化碳吸附机制,涉及高压下的中孔驱动聚合.
- 除了传统的微孔表面吸附,中孔在二氧化碳储存中发挥着至关重要的作用.
- 这项工作为设计用于选择性二氧化碳捕获的高性能碳吸附剂提供了基本的见解.
更多相关视频
09:46Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
Published on: August 25, 2016
12.1K
10:27A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System
Published on: June 12, 2019
9.1K
相关概念视频
Phase Diagrams
48.5K
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
48.5K
Pore Size Distribution
414
In concrete, the pore size distribution significantly influences the material's properties. Capillary pores, markedly larger than gel pores, form a vast network within partially hydrated cement paste, reducing the concrete's strength and increasing its permeability. This heightened permeability leads to a greater risk of damage from environmental factors like freeze-thaw cycles and chemical attacks, with the extent of vulnerability also being tied to the water-to-cement ratio.
Adequate...
Adequate...
414
Physical Principles Governing Gas Exchange
3.2K
Gas behavior plays a vital role in understanding bodily processes such as external and internal respiration. External respiration involves the diffusion of oxygen into the blood and carbon dioxide out of it in the lungs. In contrast, internal respiration happens in body tissues, where these gases move in opposite directions.
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total...
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total...
3.2K
Physical Properties Affecting Solubility
26.0K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
26.0K
Pressure and Volume in an Adiabatic Process
3.3K
Free expansion of a gas is an adiabatic process. However, there are few differences between free expansion and adiabatic expansion. During free expansion, no work is done, and there is no change in internal energy. But, for an adiabatic expansion, work is done, and there is a change in internal energy. During an adiabatic process, the relation between the pressure and volume is obtained from the condition for the adiabatic process, that is,
3.3K
Turbulent Flow: Problem Solving
364
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 enhance...
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures enhance...
364
