通过引入多项式结构来弥合吸附数据和吸附过程,以准确描述IUPAC异常热量,逐步异常热量和逐步突破曲线,弥合吸附数据和吸附过程
Chao Zheng1, Xuanlin Yang2, Ming Li3
1State Key Laboratory of NBC Protection for Civilian, Beijing 102205, People's Republic of China.
Langmuir : the ACS journal of surfaces and colloids
|February 16, 2024
概括
一个新的多项式模型准确地描述了复杂的气体吸附等温体,包括阶段式类型,以前很难建模. 这一突破有助于模拟各种多孔材料中的气体固体吸附过程.
科学领域:
- 吸附科学 吸附科学
- 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.
背景情况:
- 多孔异质吸附剂表现出复杂的吸附同热体 (IUPAC类型I-V,分阶段) 难以用单个平衡模型进行建模.
- 现有的模型限制了复杂的阶段突破曲线的准确计算,阻碍了过程模拟.
研究的目的:
- 开发一种简单,准确的模型,用于各种气/蒸汽吸附等热体和逐步突破曲线.
- 为了弥合吸附数据和吸附过程模拟之间的差距.
主要方法:
- 开发了经验性/半经验性多项式吸附模型,包括N位多项式Langmuir-Freundlich方程.
- 利用吸附等热点的曲点数来表示吸附相互作用,忽视静态条件下的扩散.
主要成果:
- N位多项式Langmuir-Freundlich方程准确地适应了常见的IUPAC等温体 (I-V) 和复杂的阶段性等温体.
- 通过使用N位多项式的Yoon-Nelson方程,成功描述了逐步突破曲线.
- 在各种吸附剂 (VOCs,TICs,H2O,CO2) 和吸附剂 (MOFs,COFs,泽奥利特,多孔碳) 中证明适用性.
结论:
- 介绍了一种多功能多项式吸附模型,能够表征所有异温体类型.
- 这种基本模型可以模拟固定和流体化床的气体固体吸附与多孔吸附剂.
更多相关视频
11:38In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
Published on: February 1, 2020
15.9K
09:43Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method
Published on: April 11, 2020
6.6K
相关概念视频
01:09Analyte Adsorption and Distribution
652
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
652
01:10Chromatography: Introduction
4.3K
Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
The phase in which the compounds linger or on which the compounds adsorb is called the stationary phase, whereas the mobile phase is the solvent that carries the solutes to be analyzed. In traditional column chromatography, the mixture flows through the stationary phase, and the compounds partition between the stationary and mobile phases...
The phase in which the compounds linger or on which the compounds adsorb is called the stationary phase, whereas the mobile phase is the solvent that carries the solutes to be analyzed. In traditional column chromatography, the mixture flows through the stationary phase, and the compounds partition between the stationary and mobile phases...
4.3K
01:08Molecular Weight of Step-Growth Polymers
2.2K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.2K
01:18pV-Diagrams
4.1K
The pV diagram, which is a graph of pressure versus volume of the gas under study, is helpful in describing certain aspects of the substance. When the substance behaves like an ideal gas, the ideal gas equation describes the relationship between its pressure and volume. On a pV diagram, it is common to plot an isotherm, which is a curve showing p as a function of V with the number of molecules and the temperature fixed. Then, for an ideal gas, the product of the pressure of the gas and its...
4.1K
02:44Heating and Cooling Curves
22.8K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
22.8K
01:21Fundamental Mathematical Principles in Pharmacokinetics: Calculus and Graphs
1.4K
The fundamental mathematical principles, such as calculus and graphs, play crucial roles in analyzing drug movement and determining pharmacokinetic parameters. Differential calculus examines rates of change and helps to determine the dissolution rate of drugs in biofluids, as well as how drug concentrations change over time. For instance, it can help calculate the rate of elimination of a drug from the body based on its concentration-time profile.
On the other hand, integral calculus focuses on...
On the other hand, integral calculus focuses on...
1.4K